firmware/libraries/Adafruit_BMP280_Library/Adafruit_BMP280.cpp

@@ -0,0 +1,493 @@
+/*!
+ *  @file Adafruit_BMP280.cpp
+ *
+ *  This is a library for the BMP280 orientation sensor
+ *
+ *  Designed specifically to work with the Adafruit BMP280 Sensor.
+ *
+ *  Pick one up today in the adafruit shop!
+ *  ------> https://www.adafruit.com/product/2651
+ *
+ *  These sensors use I2C to communicate, 2 pins are required to interface.
+ *
+ *  Adafruit invests time and resources providing this open source code,
+ *  please support Adafruit andopen-source hardware by purchasing products
+ *  from Adafruit!
+ *
+ *  K.Townsend (Adafruit Industries)
+ *
+ *  BSD license, all text above must be included in any redistribution
+ */
+
+#include <Adafruit_BMP280.h>
+
+/*!
+ * @brief  BMP280 constructor using i2c
+ * @param  *theWire
+ *         optional wire
+ */
+Adafruit_BMP280::Adafruit_BMP280(TwoWire *theWire) {
+  _wire = theWire;
+  temp_sensor = new Adafruit_BMP280_Temp(this);
+  pressure_sensor = new Adafruit_BMP280_Pressure(this);
+}
+
+/*!
+ * @brief  BMP280 constructor using hardware SPI
+ * @param  cspin
+ *         cs pin number
+ * @param  theSPI
+ *         optional SPI object
+ */
+Adafruit_BMP280::Adafruit_BMP280(int8_t cspin, SPIClass *theSPI) {
+  spi_dev = new Adafruit_SPIDevice(cspin, 1000000, SPI_BITORDER_MSBFIRST,
+                                   SPI_MODE0, theSPI);
+  temp_sensor = new Adafruit_BMP280_Temp(this);
+  pressure_sensor = new Adafruit_BMP280_Pressure(this);
+}
+
+/*!
+ * @brief  BMP280 constructor using bitbang SPI
+ * @param  cspin
+ *         The pin to use for CS/SSEL.
+ * @param  mosipin
+ *         The pin to use for MOSI.
+ * @param  misopin
+ *         The pin to use for MISO.
+ * @param  sckpin
+ *         The pin to use for SCK.
+ */
+Adafruit_BMP280::Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin,
+                                 int8_t sckpin) {
+  spi_dev = new Adafruit_SPIDevice(cspin, sckpin, misopin, mosipin);
+  temp_sensor = new Adafruit_BMP280_Temp(this);
+  pressure_sensor = new Adafruit_BMP280_Pressure(this);
+}
+
+Adafruit_BMP280::~Adafruit_BMP280(void) {
+  if (spi_dev)
+    delete spi_dev;
+  if (i2c_dev)
+    delete i2c_dev;
+  if (temp_sensor)
+    delete temp_sensor;
+  if (pressure_sensor)
+    delete pressure_sensor;
+}
+
+/*!
+ *  Initialises the sensor.
+ *  @param addr
+ *         The I2C address to use (default = 0x77)
+ *  @param chipid
+ *         The expected chip ID (used to validate connection).
+ *  @return True if the init was successful, otherwise false.
+ */
+bool Adafruit_BMP280::begin(uint8_t addr, uint8_t chipid) {
+  if (spi_dev == NULL) {
+    // I2C mode
+    if (i2c_dev)
+      delete i2c_dev;
+    i2c_dev = new Adafruit_I2CDevice(addr, _wire);
+    if (!i2c_dev->begin())
+      return false;
+  } else {
+    // SPI mode
+    if (!spi_dev->begin())
+      return false;
+  }
+
+  // check if sensor, i.e. the chip ID is correct
+  _sensorID = read8(BMP280_REGISTER_CHIPID);
+  if (_sensorID != chipid)
+    return false;
+
+  readCoefficients();
+  // write8(BMP280_REGISTER_CONTROL, 0x3F); /* needed? */
+  setSampling();
+  delay(100);
+  return true;
+}
+
+/*!
+ * Sets the sampling config for the device.
+ * @param mode
+ *        The operating mode of the sensor.
+ * @param tempSampling
+ *        The sampling scheme for temp readings.
+ * @param pressSampling
+ *        The sampling scheme for pressure readings.
+ * @param filter
+ *        The filtering mode to apply (if any).
+ * @param duration
+ *        The sampling duration.
+ */
+void Adafruit_BMP280::setSampling(sensor_mode mode,
+                                  sensor_sampling tempSampling,
+                                  sensor_sampling pressSampling,
+                                  sensor_filter filter,
+                                  standby_duration duration) {
+  if (!_sensorID)
+    return; // begin() not called yet
+  _measReg.mode = mode;
+  _measReg.osrs_t = tempSampling;
+  _measReg.osrs_p = pressSampling;
+
+  _configReg.filter = filter;
+  _configReg.t_sb = duration;
+
+  write8(BMP280_REGISTER_CONFIG, _configReg.get());
+  write8(BMP280_REGISTER_CONTROL, _measReg.get());
+}
+
+/**************************************************************************/
+/*!
+    @brief  Writes an 8 bit value over I2C/SPI
+*/
+/**************************************************************************/
+void Adafruit_BMP280::write8(byte reg, byte value) {
+  byte buffer[2];
+  buffer[1] = value;
+  if (i2c_dev) {
+    buffer[0] = reg;
+    i2c_dev->write(buffer, 2);
+  } else {
+    buffer[0] = reg & ~0x80;
+    spi_dev->write(buffer, 2);
+  }
+}
+
+/*!
+ *  @brief  Reads an 8 bit value over I2C/SPI
+ *  @param  reg
+ *          selected register
+ *  @return value from selected register
+ */
+uint8_t Adafruit_BMP280::read8(byte reg) {
+  uint8_t buffer[1];
+  if (i2c_dev) {
+    buffer[0] = uint8_t(reg);
+    i2c_dev->write_then_read(buffer, 1, buffer, 1);
+  } else {
+    buffer[0] = uint8_t(reg | 0x80);
+    spi_dev->write_then_read(buffer, 1, buffer, 1);
+  }
+  return buffer[0];
+}
+
+/*!
+ *  @brief  Reads a 16 bit value over I2C/SPI
+ */
+uint16_t Adafruit_BMP280::read16(byte reg) {
+  uint8_t buffer[2];
+
+  if (i2c_dev) {
+    buffer[0] = uint8_t(reg);
+    i2c_dev->write_then_read(buffer, 1, buffer, 2);
+  } else {
+    buffer[0] = uint8_t(reg | 0x80);
+    spi_dev->write_then_read(buffer, 1, buffer, 2);
+  }
+  return uint16_t(buffer[0]) << 8 | uint16_t(buffer[1]);
+}
+
+uint16_t Adafruit_BMP280::read16_LE(byte reg) {
+  uint16_t temp = read16(reg);
+  return (temp >> 8) | (temp << 8);
+}
+
+/*!
+ *   @brief  Reads a signed 16 bit value over I2C/SPI
+ */
+int16_t Adafruit_BMP280::readS16(byte reg) { return (int16_t)read16(reg); }
+
+int16_t Adafruit_BMP280::readS16_LE(byte reg) {
+  return (int16_t)read16_LE(reg);
+}
+
+/*!
+ *  @brief  Reads a 24 bit value over I2C/SPI
+ */
+uint32_t Adafruit_BMP280::read24(byte reg) {
+  uint8_t buffer[3];
+
+  if (i2c_dev) {
+    buffer[0] = uint8_t(reg);
+    i2c_dev->write_then_read(buffer, 1, buffer, 3);
+  } else {
+    buffer[0] = uint8_t(reg | 0x80);
+    spi_dev->write_then_read(buffer, 1, buffer, 3);
+  }
+  return uint32_t(buffer[0]) << 16 | uint32_t(buffer[1]) << 8 |
+         uint32_t(buffer[2]);
+}
+
+/*!
+ *  @brief  Reads the factory-set coefficients
+ */
+void Adafruit_BMP280::readCoefficients() {
+  _bmp280_calib.dig_T1 = read16_LE(BMP280_REGISTER_DIG_T1);
+  _bmp280_calib.dig_T2 = readS16_LE(BMP280_REGISTER_DIG_T2);
+  _bmp280_calib.dig_T3 = readS16_LE(BMP280_REGISTER_DIG_T3);
+
+  _bmp280_calib.dig_P1 = read16_LE(BMP280_REGISTER_DIG_P1);
+  _bmp280_calib.dig_P2 = readS16_LE(BMP280_REGISTER_DIG_P2);
+  _bmp280_calib.dig_P3 = readS16_LE(BMP280_REGISTER_DIG_P3);
+  _bmp280_calib.dig_P4 = readS16_LE(BMP280_REGISTER_DIG_P4);
+  _bmp280_calib.dig_P5 = readS16_LE(BMP280_REGISTER_DIG_P5);
+  _bmp280_calib.dig_P6 = readS16_LE(BMP280_REGISTER_DIG_P6);
+  _bmp280_calib.dig_P7 = readS16_LE(BMP280_REGISTER_DIG_P7);
+  _bmp280_calib.dig_P8 = readS16_LE(BMP280_REGISTER_DIG_P8);
+  _bmp280_calib.dig_P9 = readS16_LE(BMP280_REGISTER_DIG_P9);
+}
+
+/*!
+ * Reads the temperature from the device.
+ * @return The temperature in degrees celsius.
+ */
+float Adafruit_BMP280::readTemperature() {
+  int32_t var1, var2;
+  if (!_sensorID)
+    return NAN; // begin() not called yet
+
+  int32_t adc_T = read24(BMP280_REGISTER_TEMPDATA);
+  adc_T >>= 4;
+
+  var1 = ((((adc_T >> 3) - ((int32_t)_bmp280_calib.dig_T1 << 1))) *
+          ((int32_t)_bmp280_calib.dig_T2)) >>
+         11;
+
+  var2 = (((((adc_T >> 4) - ((int32_t)_bmp280_calib.dig_T1)) *
+            ((adc_T >> 4) - ((int32_t)_bmp280_calib.dig_T1))) >>
+           12) *
+          ((int32_t)_bmp280_calib.dig_T3)) >>
+         14;
+
+  t_fine = var1 + var2;
+
+  float T = (t_fine * 5 + 128) >> 8;
+  return T / 100;
+}
+
+/*!
+ * Reads the barometric pressure from the device.
+ * @return Barometric pressure in Pa.
+ */
+float Adafruit_BMP280::readPressure() {
+  int64_t var1, var2, p;
+  if (!_sensorID)
+    return NAN; // begin() not called yet
+
+  // Must be done first to get the t_fine variable set up
+  readTemperature();
+
+  int32_t adc_P = read24(BMP280_REGISTER_PRESSUREDATA);
+  adc_P >>= 4;
+
+  var1 = ((int64_t)t_fine) - 128000;
+  var2 = var1 * var1 * (int64_t)_bmp280_calib.dig_P6;
+  var2 = var2 + ((var1 * (int64_t)_bmp280_calib.dig_P5) << 17);
+  var2 = var2 + (((int64_t)_bmp280_calib.dig_P4) << 35);
+  var1 = ((var1 * var1 * (int64_t)_bmp280_calib.dig_P3) >> 8) +
+         ((var1 * (int64_t)_bmp280_calib.dig_P2) << 12);
+  var1 =
+      (((((int64_t)1) << 47) + var1)) * ((int64_t)_bmp280_calib.dig_P1) >> 33;
+
+  if (var1 == 0) {
+    return 0; // avoid exception caused by division by zero
+  }
+  p = 1048576 - adc_P;
+  p = (((p << 31) - var2) * 3125) / var1;
+  var1 = (((int64_t)_bmp280_calib.dig_P9) * (p >> 13) * (p >> 13)) >> 25;
+  var2 = (((int64_t)_bmp280_calib.dig_P8) * p) >> 19;
+
+  p = ((p + var1 + var2) >> 8) + (((int64_t)_bmp280_calib.dig_P7) << 4);
+  return (float)p / 256;
+}
+
+/*!
+ * @brief Calculates the approximate altitude using barometric pressure and the
+ * supplied sea level hPa as a reference.
+ * @param seaLevelhPa
+ *        The current hPa at sea level.
+ * @return The approximate altitude above sea level in meters.
+ */
+float Adafruit_BMP280::readAltitude(float seaLevelhPa) {
+  float altitude;
+
+  float pressure = readPressure(); // in Si units for Pascal
+  pressure /= 100;
+
+  altitude = 44330 * (1.0 - pow(pressure / seaLevelhPa, 0.1903));
+
+  return altitude;
+}
+
+/*!
+ * Calculates the pressure at sea level (QNH) from the specified altitude,
+ * and atmospheric pressure (QFE).
+ * @param  altitude      Altitude in m
+ * @param  atmospheric   Atmospheric pressure in hPa
+ * @return The approximate pressure in hPa
+ */
+float Adafruit_BMP280::seaLevelForAltitude(float altitude, float atmospheric) {
+  // Equation taken from BMP180 datasheet (page 17):
+  // http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
+
+  // Note that using the equation from wikipedia can give bad results
+  // at high altitude.  See this thread for more information:
+  // http://forums.adafruit.com/viewtopic.php?f=22&t=58064
+  return atmospheric / pow(1.0 - (altitude / 44330.0), 5.255);
+}
+
+/*!
+    @brief  calculates the boiling point  of water by a given pressure
+    @param pressure pressure in hPa
+    @return temperature in °C
+*/
+
+float Adafruit_BMP280::waterBoilingPoint(float pressure) {
+  // Magnusformular for calculation of the boiling point of water at a given
+  // pressure
+  return (234.175 * log(pressure / 6.1078)) /
+         (17.08085 - log(pressure / 6.1078));
+}
+
+/*!
+    @brief  Take a new measurement (only possible in forced mode)
+    @return true if successful, otherwise false
+ */
+bool Adafruit_BMP280::takeForcedMeasurement() {
+  // If we are in forced mode, the BME sensor goes back to sleep after each
+  // measurement and we need to set it to forced mode once at this point, so
+  // it will take the next measurement and then return to sleep again.
+  // In normal mode simply does new measurements periodically.
+  if (_measReg.mode == MODE_FORCED) {
+    // set to forced mode, i.e. "take next measurement"
+    write8(BMP280_REGISTER_CONTROL, _measReg.get());
+    // wait until measurement has been completed, otherwise we would read
+    // the values from the last measurement
+    while (read8(BMP280_REGISTER_STATUS) & 0x08)
+      delay(1);
+    return true;
+  }
+  return false;
+}
+
+/*!
+ *  @brief  Resets the chip via soft reset
+ */
+void Adafruit_BMP280::reset(void) {
+  write8(BMP280_REGISTER_SOFTRESET, MODE_SOFT_RESET_CODE);
+}
+
+/*!
+ *   Returns Sensor ID for diagnostics
+ *   @returns 0x61 for BME680, 0x60 for BME280, 0x56, 0x57, 0x58 for BMP280
+ */
+uint8_t Adafruit_BMP280::sensorID(void) { return _sensorID; };
+
+/*!
+    @brief  Gets the most recent sensor event from the hardware status register.
+    @return Sensor status as a byte.
+ */
+uint8_t Adafruit_BMP280::getStatus(void) {
+  return read8(BMP280_REGISTER_STATUS);
+}
+
+/*!
+    @brief  Gets an Adafruit Unified Sensor object for the temp sensor component
+    @return Adafruit_Sensor pointer to temperature sensor
+ */
+Adafruit_Sensor *Adafruit_BMP280::getTemperatureSensor(void) {
+  return temp_sensor;
+}
+
+/*!
+    @brief  Gets an Adafruit Unified Sensor object for the pressure sensor
+   component
+    @return Adafruit_Sensor pointer to pressure sensor
+ */
+Adafruit_Sensor *Adafruit_BMP280::getPressureSensor(void) {
+  return pressure_sensor;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Gets the sensor_t data for the BMP280's temperature sensor
+*/
+/**************************************************************************/
+void Adafruit_BMP280_Temp::getSensor(sensor_t *sensor) {
+  /* Clear the sensor_t object */
+  memset(sensor, 0, sizeof(sensor_t));
+
+  /* Insert the sensor name in the fixed length char array */
+  strncpy(sensor->name, "BMP280", sizeof(sensor->name) - 1);
+  sensor->name[sizeof(sensor->name) - 1] = 0;
+  sensor->version = 1;
+  sensor->sensor_id = _sensorID;
+  sensor->type = SENSOR_TYPE_AMBIENT_TEMPERATURE;
+  sensor->min_delay = 0;
+  sensor->min_value = -40.0; /* Temperature range -40 ~ +85 C  */
+  sensor->max_value = +85.0;
+  sensor->resolution = 0.01; /*  0.01 C */
+}
+
+/**************************************************************************/
+/*!
+    @brief  Gets the temperature as a standard sensor event
+    @param  event Sensor event object that will be populated
+    @returns True
+*/
+/**************************************************************************/
+bool Adafruit_BMP280_Temp::getEvent(sensors_event_t *event) {
+  /* Clear the event */
+  memset(event, 0, sizeof(sensors_event_t));
+
+  event->version = sizeof(sensors_event_t);
+  event->sensor_id = _sensorID;
+  event->type = SENSOR_TYPE_AMBIENT_TEMPERATURE;
+  event->timestamp = millis();
+  event->temperature = _theBMP280->readTemperature();
+  return true;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Gets the sensor_t data for the BMP280's pressure sensor
+*/
+/**************************************************************************/
+void Adafruit_BMP280_Pressure::getSensor(sensor_t *sensor) {
+  /* Clear the sensor_t object */
+  memset(sensor, 0, sizeof(sensor_t));
+
+  /* Insert the sensor name in the fixed length char array */
+  strncpy(sensor->name, "BMP280", sizeof(sensor->name) - 1);
+  sensor->name[sizeof(sensor->name) - 1] = 0;
+  sensor->version = 1;
+  sensor->sensor_id = _sensorID;
+  sensor->type = SENSOR_TYPE_PRESSURE;
+  sensor->min_delay = 0;
+  sensor->min_value = 300.0; /* 300 ~ 1100 hPa  */
+  sensor->max_value = 1100.0;
+  sensor->resolution = 0.012; /* 0.12 hPa relative */
+}
+
+/**************************************************************************/
+/*!
+    @brief  Gets the pressure as a standard sensor event
+    @param  event Sensor event object that will be populated
+    @returns True
+*/
+/**************************************************************************/
+bool Adafruit_BMP280_Pressure::getEvent(sensors_event_t *event) {
+  /* Clear the event */
+  memset(event, 0, sizeof(sensors_event_t));
+
+  event->version = sizeof(sensors_event_t);
+  event->sensor_id = _sensorID;
+  event->type = SENSOR_TYPE_PRESSURE;
+  event->timestamp = millis();
+  event->pressure = _theBMP280->readPressure() / 100; // convert Pa to hPa
+  return true;
+}

firmware/libraries/Adafruit_BMP280_Library/Adafruit_BMP280.h

@@ -0,0 +1,267 @@
+/*!
+ *  @file Adafruit_BMP280.h
+ *
+ *  This is a library for the Adafruit BMP280 Breakout.
+ *
+ *  Designed specifically to work with the Adafruit BMP280 Breakout.
+ *
+ *  Pick one up today in the adafruit shop!
+ *  ------> https://www.adafruit.com/product/2651
+ *
+ *  These sensors use I2C to communicate, 2 pins are required to interface.
+ *
+ *  Adafruit invests time and resources providing this open source code,
+ *  please support Adafruit andopen-source hardware by purchasing products
+ *  from Adafruit!
+ *
+ *  K.Townsend (Adafruit Industries)
+ *
+ *  BSD license, all text above must be included in any redistribution
+ */
+#ifndef __BMP280_H__
+#define __BMP280_H__
+
+// clang-format off
+#include <Arduino.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_SPIDevice.h>
+// clang-format on
+
+/*!
+ *  I2C ADDRESS/BITS/SETTINGS
+ */
+#define BMP280_ADDRESS (0x77) /**< The default I2C address for the sensor. */
+#define BMP280_ADDRESS_ALT                                                     \
+  (0x76)                     /**< Alternative I2C address for the sensor. */
+#define BMP280_CHIPID (0x58) /**< Default chip ID. */
+
+/*!
+ * Registers available on the sensor.
+ */
+enum {
+  BMP280_REGISTER_DIG_T1 = 0x88,
+  BMP280_REGISTER_DIG_T2 = 0x8A,
+  BMP280_REGISTER_DIG_T3 = 0x8C,
+  BMP280_REGISTER_DIG_P1 = 0x8E,
+  BMP280_REGISTER_DIG_P2 = 0x90,
+  BMP280_REGISTER_DIG_P3 = 0x92,
+  BMP280_REGISTER_DIG_P4 = 0x94,
+  BMP280_REGISTER_DIG_P5 = 0x96,
+  BMP280_REGISTER_DIG_P6 = 0x98,
+  BMP280_REGISTER_DIG_P7 = 0x9A,
+  BMP280_REGISTER_DIG_P8 = 0x9C,
+  BMP280_REGISTER_DIG_P9 = 0x9E,
+  BMP280_REGISTER_CHIPID = 0xD0,
+  BMP280_REGISTER_VERSION = 0xD1,
+  BMP280_REGISTER_SOFTRESET = 0xE0,
+  BMP280_REGISTER_CAL26 = 0xE1, /**< R calibration = 0xE1-0xF0 */
+  BMP280_REGISTER_STATUS = 0xF3,
+  BMP280_REGISTER_CONTROL = 0xF4,
+  BMP280_REGISTER_CONFIG = 0xF5,
+  BMP280_REGISTER_PRESSUREDATA = 0xF7,
+  BMP280_REGISTER_TEMPDATA = 0xFA,
+};
+
+/*!
+ *  Struct to hold calibration data.
+ */
+typedef struct {
+  uint16_t dig_T1; /**< dig_T1 cal register. */
+  int16_t dig_T2;  /**<  dig_T2 cal register. */
+  int16_t dig_T3;  /**< dig_T3 cal register. */
+
+  uint16_t dig_P1; /**< dig_P1 cal register. */
+  int16_t dig_P2;  /**< dig_P2 cal register. */
+  int16_t dig_P3;  /**< dig_P3 cal register. */
+  int16_t dig_P4;  /**< dig_P4 cal register. */
+  int16_t dig_P5;  /**< dig_P5 cal register. */
+  int16_t dig_P6;  /**< dig_P6 cal register. */
+  int16_t dig_P7;  /**< dig_P7 cal register. */
+  int16_t dig_P8;  /**< dig_P8 cal register. */
+  int16_t dig_P9;  /**< dig_P9 cal register. */
+} bmp280_calib_data;
+
+class Adafruit_BMP280;
+
+/** Adafruit Unified Sensor interface for temperature component of BMP280 */
+class Adafruit_BMP280_Temp : public Adafruit_Sensor {
+public:
+  /** @brief Create an Adafruit_Sensor compatible object for the temp sensor
+      @param parent A pointer to the BMP280 class */
+  Adafruit_BMP280_Temp(Adafruit_BMP280 *parent) { _theBMP280 = parent; }
+  bool getEvent(sensors_event_t *);
+  void getSensor(sensor_t *);
+
+private:
+  int _sensorID = 280;
+  Adafruit_BMP280 *_theBMP280 = NULL;
+};
+
+/** Adafruit Unified Sensor interface for pressure component of BMP280 */
+class Adafruit_BMP280_Pressure : public Adafruit_Sensor {
+public:
+  /** @brief Create an Adafruit_Sensor compatible object for the pressure sensor
+      @param parent A pointer to the BMP280 class */
+  Adafruit_BMP280_Pressure(Adafruit_BMP280 *parent) { _theBMP280 = parent; }
+  bool getEvent(sensors_event_t *);
+  void getSensor(sensor_t *);
+
+private:
+  int _sensorID = 0;
+  Adafruit_BMP280 *_theBMP280 = NULL;
+};
+
+/**
+ * Driver for the Adafruit BMP280 barometric pressure sensor.
+ */
+class Adafruit_BMP280 {
+public:
+  /** Oversampling rate for the sensor. */
+  enum sensor_sampling {
+    /** No over-sampling. */
+    SAMPLING_NONE = 0x00,
+    /** 1x over-sampling. */
+    SAMPLING_X1 = 0x01,
+    /** 2x over-sampling. */
+    SAMPLING_X2 = 0x02,
+    /** 4x over-sampling. */
+    SAMPLING_X4 = 0x03,
+    /** 8x over-sampling. */
+    SAMPLING_X8 = 0x04,
+    /** 16x over-sampling. */
+    SAMPLING_X16 = 0x05
+  };
+
+  /** Operating mode for the sensor. */
+  enum sensor_mode {
+    /** Sleep mode. */
+    MODE_SLEEP = 0x00,
+    /** Forced mode. */
+    MODE_FORCED = 0x01,
+    /** Normal mode. */
+    MODE_NORMAL = 0x03,
+    /** Software reset. */
+    MODE_SOFT_RESET_CODE = 0xB6
+  };
+
+  /** Filtering level for sensor data. */
+  enum sensor_filter {
+    /** No filtering. */
+    FILTER_OFF = 0x00,
+    /** 2x filtering. */
+    FILTER_X2 = 0x01,
+    /** 4x filtering. */
+    FILTER_X4 = 0x02,
+    /** 8x filtering. */
+    FILTER_X8 = 0x03,
+    /** 16x filtering. */
+    FILTER_X16 = 0x04
+  };
+
+  /** Standby duration in ms */
+  enum standby_duration {
+    /** 1 ms standby. */
+    STANDBY_MS_1 = 0x00,
+    /** 62.5 ms standby. */
+    STANDBY_MS_63 = 0x01,
+    /** 125 ms standby. */
+    STANDBY_MS_125 = 0x02,
+    /** 250 ms standby. */
+    STANDBY_MS_250 = 0x03,
+    /** 500 ms standby. */
+    STANDBY_MS_500 = 0x04,
+    /** 1000 ms standby. */
+    STANDBY_MS_1000 = 0x05,
+    /** 2000 ms standby. */
+    STANDBY_MS_2000 = 0x06,
+    /** 4000 ms standby. */
+    STANDBY_MS_4000 = 0x07
+  };
+
+  Adafruit_BMP280(TwoWire *theWire = &Wire);
+  Adafruit_BMP280(int8_t cspin, SPIClass *theSPI = &SPI);
+  Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
+  ~Adafruit_BMP280(void);
+
+  bool begin(uint8_t addr = BMP280_ADDRESS, uint8_t chipid = BMP280_CHIPID);
+  void reset(void);
+  uint8_t getStatus(void);
+  uint8_t sensorID(void);
+
+  float readTemperature();
+  float readPressure(void);
+  float readAltitude(float seaLevelhPa = 1013.25);
+  float seaLevelForAltitude(float altitude, float atmospheric);
+  float waterBoilingPoint(float pressure);
+  bool takeForcedMeasurement();
+
+  Adafruit_Sensor *getTemperatureSensor(void);
+  Adafruit_Sensor *getPressureSensor(void);
+
+  void setSampling(sensor_mode mode = MODE_NORMAL,
+                   sensor_sampling tempSampling = SAMPLING_X16,
+                   sensor_sampling pressSampling = SAMPLING_X16,
+                   sensor_filter filter = FILTER_OFF,
+                   standby_duration duration = STANDBY_MS_1);
+
+private:
+  TwoWire *_wire;                     /**< Wire object */
+  Adafruit_I2CDevice *i2c_dev = NULL; ///< Pointer to I2C bus interface
+  Adafruit_SPIDevice *spi_dev = NULL; ///< Pointer to SPI bus interface
+
+  Adafruit_BMP280_Temp *temp_sensor = NULL;
+  Adafruit_BMP280_Pressure *pressure_sensor = NULL;
+
+  /** Encapsulates the config register */
+  struct config {
+    /** Initialize to power-on-reset state */
+    config() : t_sb(STANDBY_MS_1), filter(FILTER_OFF), none(0), spi3w_en(0) {}
+    /** Inactive duration (standby time) in normal mode */
+    unsigned int t_sb : 3;
+    /** Filter settings */
+    unsigned int filter : 3;
+    /** Unused - don't set */
+    unsigned int none : 1;
+    /** Enables 3-wire SPI */
+    unsigned int spi3w_en : 1;
+    /** Used to retrieve the assembled config register's byte value. */
+    unsigned int get() { return (t_sb << 5) | (filter << 2) | spi3w_en; }
+  };
+
+  /** Encapsulates trhe ctrl_meas register */
+  struct ctrl_meas {
+    /** Initialize to power-on-reset state */
+    ctrl_meas()
+        : osrs_t(SAMPLING_NONE), osrs_p(SAMPLING_NONE), mode(MODE_SLEEP) {}
+    /** Temperature oversampling. */
+    unsigned int osrs_t : 3;
+    /** Pressure oversampling. */
+    unsigned int osrs_p : 3;
+    /** Device mode */
+    unsigned int mode : 2;
+    /** Used to retrieve the assembled ctrl_meas register's byte value. */
+    unsigned int get() { return (osrs_t << 5) | (osrs_p << 2) | mode; }
+  };
+
+  void readCoefficients(void);
+  uint8_t spixfer(uint8_t x);
+  void write8(byte reg, byte value);
+  uint8_t read8(byte reg);
+  uint16_t read16(byte reg);
+  uint32_t read24(byte reg);
+  int16_t readS16(byte reg);
+  uint16_t read16_LE(byte reg);
+  int16_t readS16_LE(byte reg);
+
+  uint8_t _i2caddr;
+
+  int32_t _sensorID = 0;
+  int32_t t_fine;
+  // int8_t _cs, _mosi, _miso, _sck;
+  bmp280_calib_data _bmp280_calib;
+  config _configReg;
+  ctrl_meas _measReg;
+};
+
+#endif

firmware/libraries/Adafruit_BMP280_Library/README.md

@@ -0,0 +1,47 @@
+# Adafruit BMP280 Driver (Barometric Pressure Sensor) [![Build Status](https://travis-ci.com/adafruit/Adafruit_BMP280_Library.svg?branch=master)](https://travis-ci.com/adafruit/Adafruit_BMP280_Library)
+
+This driver is for the [Adafruit BMP280 Breakout](http://www.adafruit.com/products/2651)
+
+<a href="https://www.adafruit.com/product/2651"><img src="assets/board.jpg" width="500"/></a>
+
+## About the BMP280 ##
+
+This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter!
+
+## About this Driver ##
+
+Adafruit invests time and resources providing this open source code.  Please support Adafruit and open-source hardware by purchasing products from Adafruit!
+
+Written by Kevin (KTOWN) Townsend for Adafruit Industries.
+
+<!-- START COMPATIBILITY TABLE -->
+
+## Compatibility
+
+MCU                | Tested Works | Doesn't Work | Not Tested  | Notes
+------------------ | :----------: | :----------: | :---------: | -----
+Atmega328 @ 16MHz  |      X       |             |            |
+Atmega328 @ 12MHz  |      X       |             |            |
+Atmega32u4 @ 16MHz |      X       |             |            | Use SDA/SCL on pins D2 &amp; D3
+Atmega32u4 @ 8MHz  |      X       |             |            | Use SDA/SCL on pins D2 &amp; D3
+ESP8266            |      X       |             |            | SDA/SCL default to pins 4 &amp; 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL)
+Atmega2560 @ 16MHz |      X       |             |            | Use SDA/SCL on pins 20 &amp; 21
+ATSAM3X8E          |      X       |             |            | Use SDA/SCL on pins 20 &amp; 21
+ATSAM21D           |      X       |             |            |
+ATtiny85 @ 16MHz   |             |      X       |            |
+ATtiny85 @ 8MHz    |             |      X       |            |
+Intel Curie @ 32MHz |             |             |     X       |
+STM32F2            |             |             |     X       |
+
+  * ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
+  * ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
+  * ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
+  * ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
+  * ESP8266 : Adafruit Huzzah
+  * ATmega2560 @ 16MHz : Arduino Mega
+  * ATSAM3X8E : Arduino Due
+  * ATSAM21D : Arduino Zero, M0 Pro
+  * ATtiny85 @ 16MHz : Adafruit Trinket 5V
+  * ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V
+
+<!-- END COMPATIBILITY TABLE -->

firmware/libraries/Adafruit_BMP280_Library/examples/bmp280_forced/bmp280_forced.ino

@@ -0,0 +1,72 @@
+/***************************************************************************
+  This is a library for the BMP280 humidity, temperature & pressure sensor
+
+  Designed specifically to work with the Adafruit BMP280 Breakout
+  ----> http://www.adafruit.com/products/2651
+
+  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
+  to interface.
+
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit andopen-source hardware by purchasing products
+  from Adafruit!
+
+  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
+  BSD license, all text above must be included in any redistribution
+ ***************************************************************************/
+
+#include <Adafruit_BMP280.h>
+
+#define BMP_SCK  (13)
+#define BMP_MISO (12)
+#define BMP_MOSI (11)
+#define BMP_CS   (10)
+
+Adafruit_BMP280 bmp; // I2C
+//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI
+//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO,  BMP_SCK);
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println(F("BMP280 Forced Mode Test."));
+
+  //if (!bmp.begin(BMP280_ADDRESS_ALT, BMP280_CHIPID)) {
+  if (!bmp.begin()) {
+    Serial.println(F("Could not find a valid BMP280 sensor, check wiring or "
+                      "try a different address!"));
+    while (1) delay(10);
+  }
+
+  /* Default settings from datasheet. */
+  bmp.setSampling(Adafruit_BMP280::MODE_FORCED,     /* Operating Mode. */
+                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
+                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
+}
+
+void loop() {
+  // must call this to wake sensor up and get new measurement data
+  // it blocks until measurement is complete
+  if (bmp.takeForcedMeasurement()) {
+    // can now print out the new measurements
+    Serial.print(F("Temperature = "));
+    Serial.print(bmp.readTemperature());
+    Serial.println(" *C");
+
+    Serial.print(F("Pressure = "));
+    Serial.print(bmp.readPressure());
+    Serial.println(" Pa");
+
+    Serial.print(F("Approx altitude = "));
+    Serial.print(bmp.readAltitude(1013.25)); /* Adjusted to local forecast! */
+    Serial.println(" m");
+
+    Serial.println();
+    delay(2000);
+  } else {
+    Serial.println("Forced measurement failed!");
+  }
+
+
+}

firmware/libraries/Adafruit_BMP280_Library/examples/bmp280_sensortest/bmp280_sensortest.ino

@@ -0,0 +1,71 @@
+/***************************************************************************
+  This is a library for the BMP280 humidity, temperature & pressure sensor
+  This example shows how to take Sensor Events instead of direct readings
+  
+  Designed specifically to work with the Adafruit BMP280 Breakout
+  ----> http://www.adafruit.com/products/2651
+
+  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
+  to interface.
+
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing products
+  from Adafruit!
+
+  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
+  BSD license, all text above must be included in any redistribution
+ ***************************************************************************/
+
+#include <Wire.h>
+#include <SPI.h>
+#include <Adafruit_BMP280.h>
+
+Adafruit_BMP280 bmp; // use I2C interface
+Adafruit_Sensor *bmp_temp = bmp.getTemperatureSensor();
+Adafruit_Sensor *bmp_pressure = bmp.getPressureSensor();
+
+void setup() {
+  Serial.begin(9600);
+  while ( !Serial ) delay(100);   // wait for native usb
+  Serial.println(F("BMP280 Sensor event test"));
+
+  unsigned status;
+  //status = bmp.begin(BMP280_ADDRESS_ALT, BMP280_CHIPID);
+  status = bmp.begin();
+  if (!status) {
+    Serial.println(F("Could not find a valid BMP280 sensor, check wiring or "
+                      "try a different address!"));
+    Serial.print("SensorID was: 0x"); Serial.println(bmp.sensorID(),16);
+    Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
+    Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
+    Serial.print("        ID of 0x60 represents a BME 280.\n");
+    Serial.print("        ID of 0x61 represents a BME 680.\n");
+    while (1) delay(10);
+  }
+
+  /* Default settings from datasheet. */
+  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
+                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
+                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
+
+  bmp_temp->printSensorDetails();
+}
+
+void loop() {
+  sensors_event_t temp_event, pressure_event;
+  bmp_temp->getEvent(&temp_event);
+  bmp_pressure->getEvent(&pressure_event);
+  
+  Serial.print(F("Temperature = "));
+  Serial.print(temp_event.temperature);
+  Serial.println(" *C");
+
+  Serial.print(F("Pressure = "));
+  Serial.print(pressure_event.pressure);
+  Serial.println(" hPa");
+
+  Serial.println();
+  delay(2000);
+}

firmware/libraries/Adafruit_BMP280_Library/examples/bmp280test/bmp280test.ino

@@ -0,0 +1,72 @@
+/***************************************************************************
+  This is a library for the BMP280 humidity, temperature & pressure sensor
+
+  Designed specifically to work with the Adafruit BMP280 Breakout
+  ----> http://www.adafruit.com/products/2651
+
+  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
+  to interface.
+
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit andopen-source hardware by purchasing products
+  from Adafruit!
+
+  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
+  BSD license, all text above must be included in any redistribution
+ ***************************************************************************/
+
+#include <Wire.h>
+#include <SPI.h>
+#include <Adafruit_BMP280.h>
+
+#define BMP_SCK  (13)
+#define BMP_MISO (12)
+#define BMP_MOSI (11)
+#define BMP_CS   (10)
+
+Adafruit_BMP280 bmp; // I2C
+//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI
+//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO,  BMP_SCK);
+
+void setup() {
+  Serial.begin(9600);
+  while ( !Serial ) delay(100);   // wait for native usb
+  Serial.println(F("BMP280 test"));
+  unsigned status;
+  //status = bmp.begin(BMP280_ADDRESS_ALT, BMP280_CHIPID);
+  status = bmp.begin();
+  if (!status) {
+    Serial.println(F("Could not find a valid BMP280 sensor, check wiring or "
+                      "try a different address!"));
+    Serial.print("SensorID was: 0x"); Serial.println(bmp.sensorID(),16);
+    Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
+    Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
+    Serial.print("        ID of 0x60 represents a BME 280.\n");
+    Serial.print("        ID of 0x61 represents a BME 680.\n");
+    while (1) delay(10);
+  }
+
+  /* Default settings from datasheet. */
+  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
+                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
+                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
+}
+
+void loop() {
+    Serial.print(F("Temperature = "));
+    Serial.print(bmp.readTemperature());
+    Serial.println(" *C");
+
+    Serial.print(F("Pressure = "));
+    Serial.print(bmp.readPressure());
+    Serial.println(" Pa");
+
+    Serial.print(F("Approx altitude = "));
+    Serial.print(bmp.readAltitude(1013.25)); /* Adjusted to local forecast! */
+    Serial.println(" m");
+
+    Serial.println();
+    delay(2000);
+}

firmware/libraries/Adafruit_BMP280_Library/keywords.txt

@@ -0,0 +1,57 @@
+#######################################
+# Syntax Coloring Map for BMP280 library
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+Adafruit_BMP280	KEYWORD1
+Adafruit_BMP280_Temp	KEYWORD1
+Adafruit_BMP280_Pressure	KEYWORD1
+bmp280_calib_data	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+begin	KEYWORD2
+reset	KEYWORD2
+getStatus	KEYWORD2
+sensorID	KEYWORD2
+getEvent	KEYWORD2
+getSensor	KEYWORD2
+readTemperature	KEYWORD2
+readPressure	KEYWORD2
+readAltitude	KEYWORD2
+seaLevelForAltitude	KEYWORD2
+waterBoilingPoint	KEYWORD2
+takeForcedMeasurement	KEYWORD2
+getTemperatureSensor	KEYWORD2
+getPressureSensor	KEYWORD2
+setSampling	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+SAMPLING_NONE	LITERAL1
+SAMPLING_X1	LITERAL1
+SAMPLING_X2	LITERAL1
+SAMPLING_X4	LITERAL1
+SAMPLING_X8	LITERAL1
+SAMPLING_X16	LITERAL1
+MODE_SLEEP	LITERAL1
+MODE_FORCED	LITERAL1
+MODE_NORMAL	LITERAL1
+MODE_SOFT_RESET_CODE	LITERAL1
+FILTER_OFF	LITERAL1
+FILTER_X2	LITERAL1
+FILTER_X4	LITERAL1
+FILTER_X8	LITERAL1
+FILTER_X16	LITERAL1
+STANDBY_MS_1	LITERAL1
+STANDBY_MS_63	LITERAL1
+STANDBY_MS_125	LITERAL1
+STANDBY_MS_250	LITERAL1
+STANDBY_MS_500	LITERAL1
+STANDBY_MS_1000	LITERAL1
+STANDBY_MS_2000	LITERAL1
+STANDBY_MS_4000	LITERAL1

firmware/libraries/Adafruit_BMP280_Library/library.properties

@@ -0,0 +1,10 @@
+name=Adafruit BMP280 Library
+version=2.6.6
+author=Adafruit
+maintainer=Adafruit <info@adafruit.com>
+sentence=Arduino library for BMP280 sensors.
+paragraph=Arduino library for BMP280 pressure and altitude sensors.
+category=Sensors
+url=https://github.com/adafruit/Adafruit_BMP280_Library
+architectures=*
+depends=Adafruit Unified Sensor, Adafruit BusIO

firmware/libraries/Adafruit_BusIO/Adafruit_BusIO_Register.cpp

@@ -0,0 +1,365 @@
+#include <Adafruit_BusIO_Register.h>
+
+#if !defined(SPI_INTERFACES_COUNT) ||                                          \
+    (defined(SPI_INTERFACES_COUNT) && (SPI_INTERFACES_COUNT > 0))
+
+/*!
+ *    @brief  Create a register we access over an I2C Device (which defines the
+ * bus and address)
+ *    @param  i2cdevice The I2CDevice to use for underlying I2C access
+ *    @param  reg_addr The address pointer value for the I2C/SMBus register, can
+ * be 8 or 16 bits
+ *    @param  width    The width of the register data itself, defaults to 1 byte
+ *    @param  byteorder The byte order of the register (used when width is > 1),
+ * defaults to LSBFIRST
+ *    @param  address_width The width of the register address itself, defaults
+ * to 1 byte
+ */
+Adafruit_BusIO_Register::Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice,
+                                                 uint16_t reg_addr,
+                                                 uint8_t width,
+                                                 uint8_t byteorder,
+                                                 uint8_t address_width) {
+  _i2cdevice = i2cdevice;
+  _spidevice = nullptr;
+  _addrwidth = address_width;
+  _address = reg_addr;
+  _byteorder = byteorder;
+  _width = width;
+}
+
+/*!
+ *    @brief  Create a register we access over an SPI Device (which defines the
+ * bus and CS pin)
+ *    @param  spidevice The SPIDevice to use for underlying SPI access
+ *    @param  reg_addr The address pointer value for the SPI register, can
+ * be 8 or 16 bits
+ *    @param  type     The method we use to read/write data to SPI (which is not
+ * as well defined as I2C)
+ *    @param  width    The width of the register data itself, defaults to 1 byte
+ *    @param  byteorder The byte order of the register (used when width is > 1),
+ * defaults to LSBFIRST
+ *    @param  address_width The width of the register address itself, defaults
+ * to 1 byte
+ */
+Adafruit_BusIO_Register::Adafruit_BusIO_Register(Adafruit_SPIDevice *spidevice,
+                                                 uint16_t reg_addr,
+                                                 Adafruit_BusIO_SPIRegType type,
+                                                 uint8_t width,
+                                                 uint8_t byteorder,
+                                                 uint8_t address_width) {
+  _spidevice = spidevice;
+  _spiregtype = type;
+  _i2cdevice = nullptr;
+  _addrwidth = address_width;
+  _address = reg_addr;
+  _byteorder = byteorder;
+  _width = width;
+}
+
+/*!
+ *    @brief  Create a register we access over an I2C or SPI Device. This is a
+ * handy function because we can pass in nullptr for the unused interface,
+ * allowing libraries to mass-define all the registers
+ *    @param  i2cdevice The I2CDevice to use for underlying I2C access, if
+ * nullptr we use SPI
+ *    @param  spidevice The SPIDevice to use for underlying SPI access, if
+ * nullptr we use I2C
+ *    @param  reg_addr The address pointer value for the I2C/SMBus/SPI register,
+ * can be 8 or 16 bits
+ *    @param  type     The method we use to read/write data to SPI (which is not
+ * as well defined as I2C)
+ *    @param  width    The width of the register data itself, defaults to 1 byte
+ *    @param  byteorder The byte order of the register (used when width is > 1),
+ * defaults to LSBFIRST
+ *    @param  address_width The width of the register address itself, defaults
+ * to 1 byte
+ */
+Adafruit_BusIO_Register::Adafruit_BusIO_Register(
+    Adafruit_I2CDevice *i2cdevice, Adafruit_SPIDevice *spidevice,
+    Adafruit_BusIO_SPIRegType type, uint16_t reg_addr, uint8_t width,
+    uint8_t byteorder, uint8_t address_width) {
+  _spidevice = spidevice;
+  _i2cdevice = i2cdevice;
+  _spiregtype = type;
+  _addrwidth = address_width;
+  _address = reg_addr;
+  _byteorder = byteorder;
+  _width = width;
+}
+
+/*!
+ *    @brief  Write a buffer of data to the register location
+ *    @param  buffer Pointer to data to write
+ *    @param  len Number of bytes to write
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_Register::write(uint8_t *buffer, uint8_t len) {
+
+  uint8_t addrbuffer[2] = {(uint8_t)(_address & 0xFF),
+                           (uint8_t)(_address >> 8)};
+
+  if (_i2cdevice) {
+    return _i2cdevice->write(buffer, len, true, addrbuffer, _addrwidth);
+  }
+  if (_spidevice) {
+    if (_spiregtype == ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE) {
+      // very special case!
+
+      // pass the special opcode address which we set as the high byte of the
+      // regaddr
+      addrbuffer[0] =
+          (uint8_t)(_address >> 8) & ~0x01; // set bottom bit low to write
+      // the 'actual' reg addr is the second byte then
+      addrbuffer[1] = (uint8_t)(_address & 0xFF);
+      // the address appears to be a byte longer
+      return _spidevice->write(buffer, len, addrbuffer, _addrwidth + 1);
+    }
+
+    if (_spiregtype == ADDRBIT8_HIGH_TOREAD) {
+      addrbuffer[0] &= ~0x80;
+    }
+    if (_spiregtype == ADDRBIT8_HIGH_TOWRITE) {
+      addrbuffer[0] |= 0x80;
+    }
+    if (_spiregtype == AD8_HIGH_TOREAD_AD7_HIGH_TOINC) {
+      addrbuffer[0] &= ~0x80;
+      addrbuffer[0] |= 0x40;
+    }
+    return _spidevice->write(buffer, len, addrbuffer, _addrwidth);
+  }
+  return false;
+}
+
+/*!
+ *    @brief  Write up to 4 bytes of data to the register location
+ *    @param  value Data to write
+ *    @param  numbytes How many bytes from 'value' to write
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_Register::write(uint32_t value, uint8_t numbytes) {
+  if (numbytes == 0) {
+    numbytes = _width;
+  }
+  if (numbytes > 4) {
+    return false;
+  }
+
+  // store a copy
+  _cached = value;
+
+  for (int i = 0; i < numbytes; i++) {
+    if (_byteorder == LSBFIRST) {
+      _buffer[i] = value & 0xFF;
+    } else {
+      _buffer[numbytes - i - 1] = value & 0xFF;
+    }
+    value >>= 8;
+  }
+  return write(_buffer, numbytes);
+}
+
+/*!
+ *    @brief  Read data from the register location. This does not do any error
+ * checking!
+ *    @return Returns 0xFFFFFFFF on failure, value otherwise
+ */
+uint32_t Adafruit_BusIO_Register::read(void) {
+  if (!read(_buffer, _width)) {
+    return -1;
+  }
+
+  uint32_t value = 0;
+
+  for (int i = 0; i < _width; i++) {
+    value <<= 8;
+    if (_byteorder == LSBFIRST) {
+      value |= _buffer[_width - i - 1];
+    } else {
+      value |= _buffer[i];
+    }
+  }
+
+  return value;
+}
+
+/*!
+ *    @brief  Read cached data from last time we wrote to this register
+ *    @return Returns 0xFFFFFFFF on failure, value otherwise
+ */
+uint32_t Adafruit_BusIO_Register::readCached(void) { return _cached; }
+
+/*!
+ *    @brief  Read a buffer of data from the register location
+ *    @param  buffer Pointer to data to read into
+ *    @param  len Number of bytes to read
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_Register::read(uint8_t *buffer, uint8_t len) {
+  uint8_t addrbuffer[2] = {(uint8_t)(_address & 0xFF),
+                           (uint8_t)(_address >> 8)};
+
+  if (_i2cdevice) {
+    return _i2cdevice->write_then_read(addrbuffer, _addrwidth, buffer, len);
+  }
+  if (_spidevice) {
+    if (_spiregtype == ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE) {
+      // very special case!
+
+      // pass the special opcode address which we set as the high byte of the
+      // regaddr
+      addrbuffer[0] =
+          (uint8_t)(_address >> 8) | 0x01; // set bottom bit high to read
+      // the 'actual' reg addr is the second byte then
+      addrbuffer[1] = (uint8_t)(_address & 0xFF);
+      // the address appears to be a byte longer
+      return _spidevice->write_then_read(addrbuffer, _addrwidth + 1, buffer,
+                                         len);
+    }
+    if (_spiregtype == ADDRBIT8_HIGH_TOREAD) {
+      addrbuffer[0] |= 0x80;
+    }
+    if (_spiregtype == ADDRBIT8_HIGH_TOWRITE) {
+      addrbuffer[0] &= ~0x80;
+    }
+    if (_spiregtype == AD8_HIGH_TOREAD_AD7_HIGH_TOINC) {
+      addrbuffer[0] |= 0x80 | 0x40;
+    }
+    return _spidevice->write_then_read(addrbuffer, _addrwidth, buffer, len);
+  }
+  return false;
+}
+
+/*!
+ *    @brief  Read 2 bytes of data from the register location
+ *    @param  value Pointer to uint16_t variable to read into
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_Register::read(uint16_t *value) {
+  if (!read(_buffer, 2)) {
+    return false;
+  }
+
+  if (_byteorder == LSBFIRST) {
+    *value = _buffer[1];
+    *value <<= 8;
+    *value |= _buffer[0];
+  } else {
+    *value = _buffer[0];
+    *value <<= 8;
+    *value |= _buffer[1];
+  }
+  return true;
+}
+
+/*!
+ *    @brief  Read 1 byte of data from the register location
+ *    @param  value Pointer to uint8_t variable to read into
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_Register::read(uint8_t *value) {
+  if (!read(_buffer, 1)) {
+    return false;
+  }
+
+  *value = _buffer[0];
+  return true;
+}
+
+/*!
+ *    @brief  Pretty printer for this register
+ *    @param  s The Stream to print to, defaults to &Serial
+ */
+void Adafruit_BusIO_Register::print(Stream *s) {
+  uint32_t val = read();
+  s->print("0x");
+  s->print(val, HEX);
+}
+
+/*!
+ *    @brief  Pretty printer for this register
+ *    @param  s The Stream to print to, defaults to &Serial
+ */
+void Adafruit_BusIO_Register::println(Stream *s) {
+  print(s);
+  s->println();
+}
+
+/*!
+ *    @brief  Create a slice of the register that we can address without
+ * touching other bits
+ *    @param  reg The Adafruit_BusIO_Register which defines the bus/register
+ *    @param  bits The number of bits wide we are slicing
+ *    @param  shift The number of bits that our bit-slice is shifted from LSB
+ */
+Adafruit_BusIO_RegisterBits::Adafruit_BusIO_RegisterBits(
+    Adafruit_BusIO_Register *reg, uint8_t bits, uint8_t shift) {
+  _register = reg;
+  _bits = bits;
+  _shift = shift;
+}
+
+/*!
+ *    @brief  Read 4 bytes of data from the register
+ *    @return  data The 4 bytes to read
+ */
+uint32_t Adafruit_BusIO_RegisterBits::read(void) {
+  uint32_t val = _register->read();
+  val >>= _shift;
+  return val & ((1 << (_bits)) - 1);
+}
+
+/*!
+ *    @brief  Write 4 bytes of data to the register
+ *    @param  data The 4 bytes to write
+ *    @return True on successful write (only really useful for I2C as SPI is
+ * uncheckable)
+ */
+bool Adafruit_BusIO_RegisterBits::write(uint32_t data) {
+  uint32_t val = _register->read();
+
+  // mask off the data before writing
+  uint32_t mask = (1 << (_bits)) - 1;
+  data &= mask;
+
+  mask <<= _shift;
+  val &= ~mask;          // remove the current data at that spot
+  val |= data << _shift; // and add in the new data
+
+  return _register->write(val, _register->width());
+}
+
+/*!
+ *    @brief  The width of the register data, helpful for doing calculations
+ *    @returns The data width used when initializing the register
+ */
+uint8_t Adafruit_BusIO_Register::width(void) { return _width; }
+
+/*!
+ *    @brief  Set the default width of data
+ *    @param width the default width of data read from register
+ */
+void Adafruit_BusIO_Register::setWidth(uint8_t width) { _width = width; }
+
+/*!
+ *    @brief  Set register address
+ *    @param address the address from register
+ */
+void Adafruit_BusIO_Register::setAddress(uint16_t address) {
+  _address = address;
+}
+
+/*!
+ *    @brief  Set the width of register address
+ *    @param address_width the width for register address
+ */
+void Adafruit_BusIO_Register::setAddressWidth(uint16_t address_width) {
+  _addrwidth = address_width;
+}
+
+#endif // SPI exists

firmware/libraries/Adafruit_BusIO/Adafruit_BusIO_Register.h

@@ -0,0 +1,105 @@
+#ifndef Adafruit_BusIO_Register_h
+#define Adafruit_BusIO_Register_h
+
+#include <Arduino.h>
+
+#if !defined(SPI_INTERFACES_COUNT) ||                                          \
+    (defined(SPI_INTERFACES_COUNT) && (SPI_INTERFACES_COUNT > 0))
+
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_SPIDevice.h>
+
+typedef enum _Adafruit_BusIO_SPIRegType {
+  ADDRBIT8_HIGH_TOREAD = 0,
+  /*!<
+   * ADDRBIT8_HIGH_TOREAD
+   * When reading a register you must actually send the value 0x80 + register
+   * address to the device. e.g. To read the register 0x0B the register value
+   * 0x8B is sent and to write 0x0B is sent.
+   */
+  AD8_HIGH_TOREAD_AD7_HIGH_TOINC = 1,
+
+  /*!<
+   * ADDRBIT8_HIGH_TOWRITE
+   * When writing to a register you must actually send the value 0x80 +
+   * the register address to the device. e.g. To write to the register 0x19 the
+   * register value 0x99 is sent and to read 0x19 is sent.
+   */
+  ADDRBIT8_HIGH_TOWRITE = 2,
+
+  /*!<
+   * ADDRESSED_OPCODE_LOWBIT_TO_WRITE
+   * Used by the MCP23S series, we send 0x40 |'rd with the opcode
+   * Then set the lowest bit to write
+   */
+  ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE = 3,
+
+} Adafruit_BusIO_SPIRegType;
+
+/*!
+ * @brief The class which defines a device register (a location to read/write
+ * data from)
+ */
+class Adafruit_BusIO_Register {
+public:
+  Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice, uint16_t reg_addr,
+                          uint8_t width = 1, uint8_t byteorder = LSBFIRST,
+                          uint8_t address_width = 1);
+
+  Adafruit_BusIO_Register(Adafruit_SPIDevice *spidevice, uint16_t reg_addr,
+                          Adafruit_BusIO_SPIRegType type, uint8_t width = 1,
+                          uint8_t byteorder = LSBFIRST,
+                          uint8_t address_width = 1);
+
+  Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice,
+                          Adafruit_SPIDevice *spidevice,
+                          Adafruit_BusIO_SPIRegType type, uint16_t reg_addr,
+                          uint8_t width = 1, uint8_t byteorder = LSBFIRST,
+                          uint8_t address_width = 1);
+
+  bool read(uint8_t *buffer, uint8_t len);
+  bool read(uint8_t *value);
+  bool read(uint16_t *value);
+  uint32_t read(void);
+  uint32_t readCached(void);
+  bool write(uint8_t *buffer, uint8_t len);
+  bool write(uint32_t value, uint8_t numbytes = 0);
+
+  uint8_t width(void);
+
+  void setWidth(uint8_t width);
+  void setAddress(uint16_t address);
+  void setAddressWidth(uint16_t address_width);
+
+  void print(Stream *s = &Serial);
+  void println(Stream *s = &Serial);
+
+private:
+  Adafruit_I2CDevice *_i2cdevice;
+  Adafruit_SPIDevice *_spidevice;
+  Adafruit_BusIO_SPIRegType _spiregtype;
+  uint16_t _address;
+  uint8_t _width, _addrwidth, _byteorder;
+  uint8_t _buffer[4]; // we won't support anything larger than uint32 for
+                      // non-buffered read
+  uint32_t _cached = 0;
+};
+
+/*!
+ * @brief The class which defines a slice of bits from within a device register
+ * (a location to read/write data from)
+ */
+class Adafruit_BusIO_RegisterBits {
+public:
+  Adafruit_BusIO_RegisterBits(Adafruit_BusIO_Register *reg, uint8_t bits,
+                              uint8_t shift);
+  bool write(uint32_t value);
+  uint32_t read(void);
+
+private:
+  Adafruit_BusIO_Register *_register;
+  uint8_t _bits, _shift;
+};
+
+#endif // SPI exists
+#endif // BusIO_Register_h

firmware/libraries/Adafruit_BusIO/Adafruit_I2CDevice.cpp

@@ -0,0 +1,313 @@
+#include "Adafruit_I2CDevice.h"
+
+//#define DEBUG_SERIAL Serial
+
+/*!
+ *    @brief  Create an I2C device at a given address
+ *    @param  addr The 7-bit I2C address for the device
+ *    @param  theWire The I2C bus to use, defaults to &Wire
+ */
+Adafruit_I2CDevice::Adafruit_I2CDevice(uint8_t addr, TwoWire *theWire) {
+  _addr = addr;
+  _wire = theWire;
+  _begun = false;
+#ifdef ARDUINO_ARCH_SAMD
+  _maxBufferSize = 250; // as defined in Wire.h's RingBuffer
+#elif defined(ESP32)
+  _maxBufferSize = I2C_BUFFER_LENGTH;
+#else
+  _maxBufferSize = 32;
+#endif
+}
+
+/*!
+ *    @brief  Initializes and does basic address detection
+ *    @param  addr_detect Whether we should attempt to detect the I2C address
+ * with a scan. 99% of sensors/devices don't mind but once in a while, they spaz
+ * on a scan!
+ *    @return True if I2C initialized and a device with the addr found
+ */
+bool Adafruit_I2CDevice::begin(bool addr_detect) {
+  _wire->begin();
+  _begun = true;
+
+  if (addr_detect) {
+    return detected();
+  }
+  return true;
+}
+
+/*!
+ *    @brief  De-initialize device, turn off the Wire interface
+ */
+void Adafruit_I2CDevice::end(void) {
+  // Not all port implement Wire::end(), such as
+  // - ESP8266
+  // - AVR core without WIRE_HAS_END
+  // - ESP32: end() is implemented since 2.0.1 which is latest at the moment.
+  // Temporarily disable for now to give time for user to update.
+#if !(defined(ESP8266) ||                                                      \
+      (defined(ARDUINO_ARCH_AVR) && !defined(WIRE_HAS_END)) ||                 \
+      defined(ARDUINO_ARCH_ESP32))
+  _wire->end();
+  _begun = false;
+#endif
+}
+
+/*!
+ *    @brief  Scans I2C for the address - note will give a false-positive
+ *    if there's no pullups on I2C
+ *    @return True if I2C initialized and a device with the addr found
+ */
+bool Adafruit_I2CDevice::detected(void) {
+  // Init I2C if not done yet
+  if (!_begun && !begin()) {
+    return false;
+  }
+
+  // A basic scanner, see if it ACK's
+  _wire->beginTransmission(_addr);
+  if (_wire->endTransmission() == 0) {
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.println(F("Detected"));
+#endif
+    return true;
+  }
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.println(F("Not detected"));
+#endif
+  return false;
+}
+
+/*!
+ *    @brief  Write a buffer or two to the I2C device. Cannot be more than
+ * maxBufferSize() bytes.
+ *    @param  buffer Pointer to buffer of data to write. This is const to
+ *            ensure the content of this buffer doesn't change.
+ *    @param  len Number of bytes from buffer to write
+ *    @param  prefix_buffer Pointer to optional array of data to write before
+ * buffer. Cannot be more than maxBufferSize() bytes. This is const to
+ *            ensure the content of this buffer doesn't change.
+ *    @param  prefix_len Number of bytes from prefix buffer to write
+ *    @param  stop Whether to send an I2C STOP signal on write
+ *    @return True if write was successful, otherwise false.
+ */
+bool Adafruit_I2CDevice::write(const uint8_t *buffer, size_t len, bool stop,
+                               const uint8_t *prefix_buffer,
+                               size_t prefix_len) {
+  if ((len + prefix_len) > maxBufferSize()) {
+    // currently not guaranteed to work if more than 32 bytes!
+    // we will need to find out if some platforms have larger
+    // I2C buffer sizes :/
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.println(F("\tI2CDevice could not write such a large buffer"));
+#endif
+    return false;
+  }
+
+  _wire->beginTransmission(_addr);
+
+  // Write the prefix data (usually an address)
+  if ((prefix_len != 0) && (prefix_buffer != nullptr)) {
+    if (_wire->write(prefix_buffer, prefix_len) != prefix_len) {
+#ifdef DEBUG_SERIAL
+      DEBUG_SERIAL.println(F("\tI2CDevice failed to write"));
+#endif
+      return false;
+    }
+  }
+
+  // Write the data itself
+  if (_wire->write(buffer, len) != len) {
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.println(F("\tI2CDevice failed to write"));
+#endif
+    return false;
+  }
+
+#ifdef DEBUG_SERIAL
+
+  DEBUG_SERIAL.print(F("\tI2CWRITE @ 0x"));
+  DEBUG_SERIAL.print(_addr, HEX);
+  DEBUG_SERIAL.print(F(" :: "));
+  if ((prefix_len != 0) && (prefix_buffer != nullptr)) {
+    for (uint16_t i = 0; i < prefix_len; i++) {
+      DEBUG_SERIAL.print(F("0x"));
+      DEBUG_SERIAL.print(prefix_buffer[i], HEX);
+      DEBUG_SERIAL.print(F(", "));
+    }
+  }
+  for (uint16_t i = 0; i < len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (i % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+
+  if (stop) {
+    DEBUG_SERIAL.print("\tSTOP");
+  }
+#endif
+
+  if (_wire->endTransmission(stop) == 0) {
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.println();
+    // DEBUG_SERIAL.println("Sent!");
+#endif
+    return true;
+  } else {
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.println("\tFailed to send!");
+#endif
+    return false;
+  }
+}
+
+/*!
+ *    @brief  Read from I2C into a buffer from the I2C device.
+ *    Cannot be more than maxBufferSize() bytes.
+ *    @param  buffer Pointer to buffer of data to read into
+ *    @param  len Number of bytes from buffer to read.
+ *    @param  stop Whether to send an I2C STOP signal on read
+ *    @return True if read was successful, otherwise false.
+ */
+bool Adafruit_I2CDevice::read(uint8_t *buffer, size_t len, bool stop) {
+  size_t pos = 0;
+  while (pos < len) {
+    size_t read_len =
+        ((len - pos) > maxBufferSize()) ? maxBufferSize() : (len - pos);
+    bool read_stop = (pos < (len - read_len)) ? false : stop;
+    if (!_read(buffer + pos, read_len, read_stop))
+      return false;
+    pos += read_len;
+  }
+  return true;
+}
+
+bool Adafruit_I2CDevice::_read(uint8_t *buffer, size_t len, bool stop) {
+#if defined(TinyWireM_h)
+  size_t recv = _wire->requestFrom((uint8_t)_addr, (uint8_t)len);
+#elif defined(ARDUINO_ARCH_MEGAAVR)
+  size_t recv = _wire->requestFrom(_addr, len, stop);
+#else
+  size_t recv = _wire->requestFrom((uint8_t)_addr, (uint8_t)len, (uint8_t)stop);
+#endif
+
+  if (recv != len) {
+    // Not enough data available to fulfill our obligation!
+#ifdef DEBUG_SERIAL
+    DEBUG_SERIAL.print(F("\tI2CDevice did not receive enough data: "));
+    DEBUG_SERIAL.println(recv);
+#endif
+    return false;
+  }
+
+  for (uint16_t i = 0; i < len; i++) {
+    buffer[i] = _wire->read();
+  }
+
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.print(F("\tI2CREAD  @ 0x"));
+  DEBUG_SERIAL.print(_addr, HEX);
+  DEBUG_SERIAL.print(F(" :: "));
+  for (uint16_t i = 0; i < len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (len % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+  DEBUG_SERIAL.println();
+#endif
+
+  return true;
+}
+
+/*!
+ *    @brief  Write some data, then read some data from I2C into another buffer.
+ *    Cannot be more than maxBufferSize() bytes. The buffers can point to
+ *    same/overlapping locations.
+ *    @param  write_buffer Pointer to buffer of data to write from
+ *    @param  write_len Number of bytes from buffer to write.
+ *    @param  read_buffer Pointer to buffer of data to read into.
+ *    @param  read_len Number of bytes from buffer to read.
+ *    @param  stop Whether to send an I2C STOP signal between the write and read
+ *    @return True if write & read was successful, otherwise false.
+ */
+bool Adafruit_I2CDevice::write_then_read(const uint8_t *write_buffer,
+                                         size_t write_len, uint8_t *read_buffer,
+                                         size_t read_len, bool stop) {
+  if (!write(write_buffer, write_len, stop)) {
+    return false;
+  }
+
+  return read(read_buffer, read_len);
+}
+
+/*!
+ *    @brief  Returns the 7-bit address of this device
+ *    @return The 7-bit address of this device
+ */
+uint8_t Adafruit_I2CDevice::address(void) { return _addr; }
+
+/*!
+ *    @brief  Change the I2C clock speed to desired (relies on
+ *    underlying Wire support!
+ *    @param desiredclk The desired I2C SCL frequency
+ *    @return True if this platform supports changing I2C speed.
+ *    Not necessarily that the speed was achieved!
+ */
+bool Adafruit_I2CDevice::setSpeed(uint32_t desiredclk) {
+#if defined(__AVR_ATmega328__) ||                                              \
+    defined(__AVR_ATmega328P__) // fix arduino core set clock
+  // calculate TWBR correctly
+
+  if ((F_CPU / 18) < desiredclk) {
+#ifdef DEBUG_SERIAL
+    Serial.println(F("I2C.setSpeed too high."));
+#endif
+    return false;
+  }
+  uint32_t atwbr = ((F_CPU / desiredclk) - 16) / 2;
+  if (atwbr > 16320) {
+#ifdef DEBUG_SERIAL
+    Serial.println(F("I2C.setSpeed too low."));
+#endif
+    return false;
+  }
+
+  if (atwbr <= 255) {
+    atwbr /= 1;
+    TWSR = 0x0;
+  } else if (atwbr <= 1020) {
+    atwbr /= 4;
+    TWSR = 0x1;
+  } else if (atwbr <= 4080) {
+    atwbr /= 16;
+    TWSR = 0x2;
+  } else { //  if (atwbr <= 16320)
+    atwbr /= 64;
+    TWSR = 0x3;
+  }
+  TWBR = atwbr;
+
+#ifdef DEBUG_SERIAL
+  Serial.print(F("TWSR prescaler = "));
+  Serial.println(pow(4, TWSR));
+  Serial.print(F("TWBR = "));
+  Serial.println(atwbr);
+#endif
+  return true;
+#elif (ARDUINO >= 157) && !defined(ARDUINO_STM32_FEATHER) &&                   \
+    !defined(TinyWireM_h)
+  _wire->setClock(desiredclk);
+  return true;
+
+#else
+  (void)desiredclk;
+  return false;
+#endif
+}

firmware/libraries/Adafruit_BusIO/Adafruit_I2CDevice.h

@@ -0,0 +1,36 @@
+#ifndef Adafruit_I2CDevice_h
+#define Adafruit_I2CDevice_h
+
+#include <Arduino.h>
+#include <Wire.h>
+
+///< The class which defines how we will talk to this device over I2C
+class Adafruit_I2CDevice {
+public:
+  Adafruit_I2CDevice(uint8_t addr, TwoWire *theWire = &Wire);
+  uint8_t address(void);
+  bool begin(bool addr_detect = true);
+  void end(void);
+  bool detected(void);
+
+  bool read(uint8_t *buffer, size_t len, bool stop = true);
+  bool write(const uint8_t *buffer, size_t len, bool stop = true,
+             const uint8_t *prefix_buffer = nullptr, size_t prefix_len = 0);
+  bool write_then_read(const uint8_t *write_buffer, size_t write_len,
+                       uint8_t *read_buffer, size_t read_len,
+                       bool stop = false);
+  bool setSpeed(uint32_t desiredclk);
+
+  /*!   @brief  How many bytes we can read in a transaction
+   *    @return The size of the Wire receive/transmit buffer */
+  size_t maxBufferSize() { return _maxBufferSize; }
+
+private:
+  uint8_t _addr;
+  TwoWire *_wire;
+  bool _begun;
+  size_t _maxBufferSize;
+  bool _read(uint8_t *buffer, size_t len, bool stop);
+};
+
+#endif // Adafruit_I2CDevice_h

firmware/libraries/Adafruit_BusIO/Adafruit_I2CRegister.h

@@ -0,0 +1,10 @@
+#ifndef _ADAFRUIT_I2C_REGISTER_H_
+#define _ADAFRUIT_I2C_REGISTER_H_
+
+#include <Adafruit_BusIO_Register.h>
+#include <Arduino.h>
+
+typedef Adafruit_BusIO_Register Adafruit_I2CRegister;
+typedef Adafruit_BusIO_RegisterBits Adafruit_I2CRegisterBits;
+
+#endif

firmware/libraries/Adafruit_BusIO/Adafruit_SPIDevice.cpp

@@ -0,0 +1,508 @@
+#include "Adafruit_SPIDevice.h"
+
+//#define DEBUG_SERIAL Serial
+
+/*!
+ *    @brief  Create an SPI device with the given CS pin and settings
+ *    @param  cspin The arduino pin number to use for chip select
+ *    @param  freq The SPI clock frequency to use, defaults to 1MHz
+ *    @param  dataOrder The SPI data order to use for bits within each byte,
+ * defaults to SPI_BITORDER_MSBFIRST
+ *    @param  dataMode The SPI mode to use, defaults to SPI_MODE0
+ *    @param  theSPI The SPI bus to use, defaults to &theSPI
+ */
+Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, uint32_t freq,
+                                       BusIOBitOrder dataOrder,
+                                       uint8_t dataMode, SPIClass *theSPI) {
+#ifdef BUSIO_HAS_HW_SPI
+  _cs = cspin;
+  _sck = _mosi = _miso = -1;
+  _spi = theSPI;
+  _begun = false;
+  _spiSetting = new SPISettings(freq, dataOrder, dataMode);
+  _freq = freq;
+  _dataOrder = dataOrder;
+  _dataMode = dataMode;
+#else
+  // unused, but needed to suppress compiler warns
+  (void)cspin;
+  (void)freq;
+  (void)dataOrder;
+  (void)dataMode;
+  (void)theSPI;
+#endif
+}
+
+/*!
+ *    @brief  Create an SPI device with the given CS pin and settings
+ *    @param  cspin The arduino pin number to use for chip select
+ *    @param  sckpin The arduino pin number to use for SCK
+ *    @param  misopin The arduino pin number to use for MISO, set to -1 if not
+ * used
+ *    @param  mosipin The arduino pin number to use for MOSI, set to -1 if not
+ * used
+ *    @param  freq The SPI clock frequency to use, defaults to 1MHz
+ *    @param  dataOrder The SPI data order to use for bits within each byte,
+ * defaults to SPI_BITORDER_MSBFIRST
+ *    @param  dataMode The SPI mode to use, defaults to SPI_MODE0
+ */
+Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, int8_t sckpin,
+                                       int8_t misopin, int8_t mosipin,
+                                       uint32_t freq, BusIOBitOrder dataOrder,
+                                       uint8_t dataMode) {
+  _cs = cspin;
+  _sck = sckpin;
+  _miso = misopin;
+  _mosi = mosipin;
+
+#ifdef BUSIO_USE_FAST_PINIO
+  csPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(cspin));
+  csPinMask = digitalPinToBitMask(cspin);
+  if (mosipin != -1) {
+    mosiPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(mosipin));
+    mosiPinMask = digitalPinToBitMask(mosipin);
+  }
+  if (misopin != -1) {
+    misoPort = (BusIO_PortReg *)portInputRegister(digitalPinToPort(misopin));
+    misoPinMask = digitalPinToBitMask(misopin);
+  }
+  clkPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(sckpin));
+  clkPinMask = digitalPinToBitMask(sckpin);
+#endif
+
+  _freq = freq;
+  _dataOrder = dataOrder;
+  _dataMode = dataMode;
+  _begun = false;
+}
+
+/*!
+ *    @brief  Release memory allocated in constructors
+ */
+Adafruit_SPIDevice::~Adafruit_SPIDevice() {
+  if (_spiSetting)
+    delete _spiSetting;
+}
+
+/*!
+ *    @brief  Initializes SPI bus and sets CS pin high
+ *    @return Always returns true because there's no way to test success of SPI
+ * init
+ */
+bool Adafruit_SPIDevice::begin(void) {
+  if (_cs != -1) {
+    pinMode(_cs, OUTPUT);
+    digitalWrite(_cs, HIGH);
+  }
+
+  if (_spi) { // hardware SPI
+#ifdef BUSIO_HAS_HW_SPI
+    _spi->begin();
+#endif
+  } else {
+    pinMode(_sck, OUTPUT);
+
+    if ((_dataMode == SPI_MODE0) || (_dataMode == SPI_MODE1)) {
+      // idle low on mode 0 and 1
+      digitalWrite(_sck, LOW);
+    } else {
+      // idle high on mode 2 or 3
+      digitalWrite(_sck, HIGH);
+    }
+    if (_mosi != -1) {
+      pinMode(_mosi, OUTPUT);
+      digitalWrite(_mosi, HIGH);
+    }
+    if (_miso != -1) {
+      pinMode(_miso, INPUT);
+    }
+  }
+
+  _begun = true;
+  return true;
+}
+
+/*!
+ *    @brief  Transfer (send/receive) a buffer over hard/soft SPI, without
+ * transaction management
+ *    @param  buffer The buffer to send and receive at the same time
+ *    @param  len    The number of bytes to transfer
+ */
+void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
+  //
+  // HARDWARE SPI
+  //
+  if (_spi) {
+#ifdef BUSIO_HAS_HW_SPI
+#if defined(SPARK)
+    _spi->transfer(buffer, buffer, len, nullptr);
+#elif defined(STM32)
+    for (size_t i = 0; i < len; i++) {
+      _spi->transfer(buffer[i]);
+    }
+#else
+    _spi->transfer(buffer, len);
+#endif
+    return;
+#endif
+  }
+
+  //
+  // SOFTWARE SPI
+  //
+  uint8_t startbit;
+  if (_dataOrder == SPI_BITORDER_LSBFIRST) {
+    startbit = 0x1;
+  } else {
+    startbit = 0x80;
+  }
+
+  bool towrite, lastmosi = !(buffer[0] & startbit);
+  uint8_t bitdelay_us = (1000000 / _freq) / 2;
+
+  for (size_t i = 0; i < len; i++) {
+    uint8_t reply = 0;
+    uint8_t send = buffer[i];
+
+    /*
+    Serial.print("\tSending software SPI byte 0x");
+    Serial.print(send, HEX);
+    Serial.print(" -> 0x");
+    */
+
+    // Serial.print(send, HEX);
+    for (uint8_t b = startbit; b != 0;
+         b = (_dataOrder == SPI_BITORDER_LSBFIRST) ? b << 1 : b >> 1) {
+
+      if (bitdelay_us) {
+        delayMicroseconds(bitdelay_us);
+      }
+
+      if (_dataMode == SPI_MODE0 || _dataMode == SPI_MODE2) {
+        towrite = send & b;
+        if ((_mosi != -1) && (lastmosi != towrite)) {
+#ifdef BUSIO_USE_FAST_PINIO
+          if (towrite)
+            *mosiPort |= mosiPinMask;
+          else
+            *mosiPort &= ~mosiPinMask;
+#else
+          digitalWrite(_mosi, towrite);
+#endif
+          lastmosi = towrite;
+        }
+
+#ifdef BUSIO_USE_FAST_PINIO
+        *clkPort |= clkPinMask; // Clock high
+#else
+        digitalWrite(_sck, HIGH);
+#endif
+
+        if (bitdelay_us) {
+          delayMicroseconds(bitdelay_us);
+        }
+
+        if (_miso != -1) {
+#ifdef BUSIO_USE_FAST_PINIO
+          if (*misoPort & misoPinMask) {
+#else
+          if (digitalRead(_miso)) {
+#endif
+            reply |= b;
+          }
+        }
+
+#ifdef BUSIO_USE_FAST_PINIO
+        *clkPort &= ~clkPinMask; // Clock low
+#else
+        digitalWrite(_sck, LOW);
+#endif
+      } else { // if (_dataMode == SPI_MODE1 || _dataMode == SPI_MODE3)
+
+#ifdef BUSIO_USE_FAST_PINIO
+        *clkPort |= clkPinMask; // Clock high
+#else
+        digitalWrite(_sck, HIGH);
+#endif
+
+        if (bitdelay_us) {
+          delayMicroseconds(bitdelay_us);
+        }
+
+        if (_mosi != -1) {
+#ifdef BUSIO_USE_FAST_PINIO
+          if (send & b)
+            *mosiPort |= mosiPinMask;
+          else
+            *mosiPort &= ~mosiPinMask;
+#else
+          digitalWrite(_mosi, send & b);
+#endif
+        }
+
+#ifdef BUSIO_USE_FAST_PINIO
+        *clkPort &= ~clkPinMask; // Clock low
+#else
+        digitalWrite(_sck, LOW);
+#endif
+
+        if (_miso != -1) {
+#ifdef BUSIO_USE_FAST_PINIO
+          if (*misoPort & misoPinMask) {
+#else
+          if (digitalRead(_miso)) {
+#endif
+            reply |= b;
+          }
+        }
+      }
+      if (_miso != -1) {
+        buffer[i] = reply;
+      }
+    }
+  }
+  return;
+}
+
+/*!
+ *    @brief  Transfer (send/receive) one byte over hard/soft SPI, without
+ * transaction management
+ *    @param  send The byte to send
+ *    @return The byte received while transmitting
+ */
+uint8_t Adafruit_SPIDevice::transfer(uint8_t send) {
+  uint8_t data = send;
+  transfer(&data, 1);
+  return data;
+}
+
+/*!
+ *    @brief  Manually begin a transaction (calls beginTransaction if hardware
+ * SPI)
+ */
+void Adafruit_SPIDevice::beginTransaction(void) {
+  if (_spi) {
+#ifdef BUSIO_HAS_HW_SPI
+    _spi->beginTransaction(*_spiSetting);
+#endif
+  }
+}
+
+/*!
+ *    @brief  Manually end a transaction (calls endTransaction if hardware SPI)
+ */
+void Adafruit_SPIDevice::endTransaction(void) {
+  if (_spi) {
+#ifdef BUSIO_HAS_HW_SPI
+    _spi->endTransaction();
+#endif
+  }
+}
+
+/*!
+ *    @brief  Assert/Deassert the CS pin if it is defined
+ *    @param  value The state the CS is set to
+ */
+void Adafruit_SPIDevice::setChipSelect(int value) {
+  if (_cs != -1) {
+    digitalWrite(_cs, value);
+  }
+}
+
+/*!
+ *    @brief  Write a buffer or two to the SPI device, with transaction
+ * management.
+ *    @brief  Manually begin a transaction (calls beginTransaction if hardware
+ *            SPI) with asserting the CS pin
+ */
+void Adafruit_SPIDevice::beginTransactionWithAssertingCS() {
+  beginTransaction();
+  setChipSelect(LOW);
+}
+
+/*!
+ *    @brief  Manually end a transaction (calls endTransaction if hardware SPI)
+ *            with deasserting the CS pin
+ */
+void Adafruit_SPIDevice::endTransactionWithDeassertingCS() {
+  setChipSelect(HIGH);
+  endTransaction();
+}
+
+/*!
+ *    @brief  Write a buffer or two to the SPI device, with transaction
+ * management.
+ *    @param  buffer Pointer to buffer of data to write
+ *    @param  len Number of bytes from buffer to write
+ *    @param  prefix_buffer Pointer to optional array of data to write before
+ * buffer.
+ *    @param  prefix_len Number of bytes from prefix buffer to write
+ *    @return Always returns true because there's no way to test success of SPI
+ * writes
+ */
+bool Adafruit_SPIDevice::write(const uint8_t *buffer, size_t len,
+                               const uint8_t *prefix_buffer,
+                               size_t prefix_len) {
+  beginTransactionWithAssertingCS();
+
+  // do the writing
+#if defined(ARDUINO_ARCH_ESP32)
+  if (_spi) {
+    if (prefix_len > 0) {
+      _spi->transferBytes(prefix_buffer, nullptr, prefix_len);
+    }
+    if (len > 0) {
+      _spi->transferBytes(buffer, nullptr, len);
+    }
+  } else
+#endif
+  {
+    for (size_t i = 0; i < prefix_len; i++) {
+      transfer(prefix_buffer[i]);
+    }
+    for (size_t i = 0; i < len; i++) {
+      transfer(buffer[i]);
+    }
+  }
+  endTransactionWithDeassertingCS();
+
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.print(F("\tSPIDevice Wrote: "));
+  if ((prefix_len != 0) && (prefix_buffer != nullptr)) {
+    for (uint16_t i = 0; i < prefix_len; i++) {
+      DEBUG_SERIAL.print(F("0x"));
+      DEBUG_SERIAL.print(prefix_buffer[i], HEX);
+      DEBUG_SERIAL.print(F(", "));
+    }
+  }
+  for (uint16_t i = 0; i < len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (i % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+  DEBUG_SERIAL.println();
+#endif
+
+  return true;
+}
+
+/*!
+ *    @brief  Read from SPI into a buffer from the SPI device, with transaction
+ * management.
+ *    @param  buffer Pointer to buffer of data to read into
+ *    @param  len Number of bytes from buffer to read.
+ *    @param  sendvalue The 8-bits of data to write when doing the data read,
+ * defaults to 0xFF
+ *    @return Always returns true because there's no way to test success of SPI
+ * writes
+ */
+bool Adafruit_SPIDevice::read(uint8_t *buffer, size_t len, uint8_t sendvalue) {
+  memset(buffer, sendvalue, len); // clear out existing buffer
+
+  beginTransactionWithAssertingCS();
+  transfer(buffer, len);
+  endTransactionWithDeassertingCS();
+
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.print(F("\tSPIDevice Read: "));
+  for (uint16_t i = 0; i < len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (len % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+  DEBUG_SERIAL.println();
+#endif
+
+  return true;
+}
+
+/*!
+ *    @brief  Write some data, then read some data from SPI into another buffer,
+ * with transaction management. The buffers can point to same/overlapping
+ * locations. This does not transmit-receive at the same time!
+ *    @param  write_buffer Pointer to buffer of data to write from
+ *    @param  write_len Number of bytes from buffer to write.
+ *    @param  read_buffer Pointer to buffer of data to read into.
+ *    @param  read_len Number of bytes from buffer to read.
+ *    @param  sendvalue The 8-bits of data to write when doing the data read,
+ * defaults to 0xFF
+ *    @return Always returns true because there's no way to test success of SPI
+ * writes
+ */
+bool Adafruit_SPIDevice::write_then_read(const uint8_t *write_buffer,
+                                         size_t write_len, uint8_t *read_buffer,
+                                         size_t read_len, uint8_t sendvalue) {
+  beginTransactionWithAssertingCS();
+  // do the writing
+#if defined(ARDUINO_ARCH_ESP32)
+  if (_spi) {
+    if (write_len > 0) {
+      _spi->transferBytes(write_buffer, nullptr, write_len);
+    }
+  } else
+#endif
+  {
+    for (size_t i = 0; i < write_len; i++) {
+      transfer(write_buffer[i]);
+    }
+  }
+
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.print(F("\tSPIDevice Wrote: "));
+  for (uint16_t i = 0; i < write_len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(write_buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (write_len % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+  DEBUG_SERIAL.println();
+#endif
+
+  // do the reading
+  for (size_t i = 0; i < read_len; i++) {
+    read_buffer[i] = transfer(sendvalue);
+  }
+
+#ifdef DEBUG_SERIAL
+  DEBUG_SERIAL.print(F("\tSPIDevice Read: "));
+  for (uint16_t i = 0; i < read_len; i++) {
+    DEBUG_SERIAL.print(F("0x"));
+    DEBUG_SERIAL.print(read_buffer[i], HEX);
+    DEBUG_SERIAL.print(F(", "));
+    if (read_len % 32 == 31) {
+      DEBUG_SERIAL.println();
+    }
+  }
+  DEBUG_SERIAL.println();
+#endif
+
+  endTransactionWithDeassertingCS();
+
+  return true;
+}
+
+/*!
+ *    @brief  Write some data and read some data at the same time from SPI
+ * into the same buffer, with transaction management. This is basicaly a wrapper
+ * for transfer() with CS-pin and transaction management. This /does/
+ * transmit-receive at the same time!
+ *    @param  buffer Pointer to buffer of data to write/read to/from
+ *    @param  len Number of bytes from buffer to write/read.
+ *    @return Always returns true because there's no way to test success of SPI
+ * writes
+ */
+bool Adafruit_SPIDevice::write_and_read(uint8_t *buffer, size_t len) {
+  beginTransactionWithAssertingCS();
+  transfer(buffer, len);
+  endTransactionWithDeassertingCS();
+
+  return true;
+}

firmware/libraries/Adafruit_BusIO/Adafruit_SPIDevice.h

@@ -0,0 +1,138 @@
+#ifndef Adafruit_SPIDevice_h
+#define Adafruit_SPIDevice_h
+
+#include <Arduino.h>
+
+#if !defined(SPI_INTERFACES_COUNT) ||                                          \
+    (defined(SPI_INTERFACES_COUNT) && (SPI_INTERFACES_COUNT > 0))
+// HW SPI available
+#include <SPI.h>
+#define BUSIO_HAS_HW_SPI
+#else
+// SW SPI ONLY
+enum { SPI_MODE0, SPI_MODE1, SPI_MODE2, _SPI_MODE4 };
+typedef uint8_t SPIClass;
+#endif
+
+// some modern SPI definitions don't have BitOrder enum
+#if (defined(__AVR__) && !defined(ARDUINO_ARCH_MEGAAVR)) ||                    \
+    defined(ESP8266) || defined(TEENSYDUINO) || defined(SPARK) ||              \
+    defined(ARDUINO_ARCH_SPRESENSE) || defined(MEGATINYCORE) ||                \
+    defined(DXCORE) || defined(ARDUINO_AVR_ATmega4809) ||                      \
+    defined(ARDUINO_AVR_ATmega4808) || defined(ARDUINO_AVR_ATmega3209) ||      \
+    defined(ARDUINO_AVR_ATmega3208) || defined(ARDUINO_AVR_ATmega1609) ||      \
+    defined(ARDUINO_AVR_ATmega1608) || defined(ARDUINO_AVR_ATmega809) ||       \
+    defined(ARDUINO_AVR_ATmega808) || defined(ARDUINO_ARCH_ARC32)
+
+typedef enum _BitOrder {
+  SPI_BITORDER_MSBFIRST = MSBFIRST,
+  SPI_BITORDER_LSBFIRST = LSBFIRST,
+} BusIOBitOrder;
+
+#elif defined(ESP32) || defined(__ASR6501__) || defined(__ASR6502__)
+
+// some modern SPI definitions don't have BitOrder enum and have different SPI
+// mode defines
+typedef enum _BitOrder {
+  SPI_BITORDER_MSBFIRST = SPI_MSBFIRST,
+  SPI_BITORDER_LSBFIRST = SPI_LSBFIRST,
+} BusIOBitOrder;
+
+#else
+// Some platforms have a BitOrder enum but its named MSBFIRST/LSBFIRST
+#define SPI_BITORDER_MSBFIRST MSBFIRST
+#define SPI_BITORDER_LSBFIRST LSBFIRST
+typedef BitOrder BusIOBitOrder;
+#endif
+
+#if defined(__IMXRT1062__) // Teensy 4.x
+// *Warning* I disabled the usage of FAST_PINIO as the set/clear operations
+// used in the cpp file are not atomic and can effect multiple IO pins
+// and if an interrupt happens in between the time the code reads the register
+//  and writes out the updated value, that changes one or more other IO pins
+// on that same IO port, those change will be clobbered when the updated
+// values are written back.  A fast version can be implemented that uses the
+// ports set and clear registers which are atomic.
+// typedef volatile uint32_t BusIO_PortReg;
+// typedef uint32_t BusIO_PortMask;
+//#define BUSIO_USE_FAST_PINIO
+
+#elif defined(__AVR__) || defined(TEENSYDUINO)
+typedef volatile uint8_t BusIO_PortReg;
+typedef uint8_t BusIO_PortMask;
+#define BUSIO_USE_FAST_PINIO
+
+#elif defined(ESP8266) || defined(ESP32) || defined(__SAM3X8E__) ||            \
+    defined(ARDUINO_ARCH_SAMD)
+typedef volatile uint32_t BusIO_PortReg;
+typedef uint32_t BusIO_PortMask;
+#define BUSIO_USE_FAST_PINIO
+
+#elif (defined(__arm__) || defined(ARDUINO_FEATHER52)) &&                      \
+    !defined(ARDUINO_ARCH_MBED) && !defined(ARDUINO_ARCH_RP2040)
+typedef volatile uint32_t BusIO_PortReg;
+typedef uint32_t BusIO_PortMask;
+#if !defined(__ASR6501__) && !defined(__ASR6502__)
+#define BUSIO_USE_FAST_PINIO
+#endif
+
+#else
+#undef BUSIO_USE_FAST_PINIO
+#endif
+
+/**! The class which defines how we will talk to this device over SPI **/
+class Adafruit_SPIDevice {
+public:
+#ifdef BUSIO_HAS_HW_SPI
+  Adafruit_SPIDevice(int8_t cspin, uint32_t freq = 1000000,
+                     BusIOBitOrder dataOrder = SPI_BITORDER_MSBFIRST,
+                     uint8_t dataMode = SPI_MODE0, SPIClass *theSPI = &SPI);
+#else
+  Adafruit_SPIDevice(int8_t cspin, uint32_t freq = 1000000,
+                     BusIOBitOrder dataOrder = SPI_BITORDER_MSBFIRST,
+                     uint8_t dataMode = SPI_MODE0, SPIClass *theSPI = nullptr);
+#endif
+  Adafruit_SPIDevice(int8_t cspin, int8_t sck, int8_t miso, int8_t mosi,
+                     uint32_t freq = 1000000,
+                     BusIOBitOrder dataOrder = SPI_BITORDER_MSBFIRST,
+                     uint8_t dataMode = SPI_MODE0);
+  ~Adafruit_SPIDevice();
+
+  bool begin(void);
+  bool read(uint8_t *buffer, size_t len, uint8_t sendvalue = 0xFF);
+  bool write(const uint8_t *buffer, size_t len,
+             const uint8_t *prefix_buffer = nullptr, size_t prefix_len = 0);
+  bool write_then_read(const uint8_t *write_buffer, size_t write_len,
+                       uint8_t *read_buffer, size_t read_len,
+                       uint8_t sendvalue = 0xFF);
+  bool write_and_read(uint8_t *buffer, size_t len);
+
+  uint8_t transfer(uint8_t send);
+  void transfer(uint8_t *buffer, size_t len);
+  void beginTransaction(void);
+  void endTransaction(void);
+  void beginTransactionWithAssertingCS();
+  void endTransactionWithDeassertingCS();
+
+private:
+#ifdef BUSIO_HAS_HW_SPI
+  SPIClass *_spi = nullptr;
+  SPISettings *_spiSetting = nullptr;
+#else
+  uint8_t *_spi = nullptr;
+  uint8_t *_spiSetting = nullptr;
+#endif
+  uint32_t _freq;
+  BusIOBitOrder _dataOrder;
+  uint8_t _dataMode;
+  void setChipSelect(int value);
+
+  int8_t _cs, _sck, _mosi, _miso;
+#ifdef BUSIO_USE_FAST_PINIO
+  BusIO_PortReg *mosiPort, *clkPort, *misoPort, *csPort;
+  BusIO_PortMask mosiPinMask, misoPinMask, clkPinMask, csPinMask;
+#endif
+  bool _begun;
+};
+
+#endif // Adafruit_SPIDevice_h

firmware/libraries/Adafruit_BusIO/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Adafruit Bus IO Library
+# https://github.com/adafruit/Adafruit_BusIO
+# MIT License
+
+cmake_minimum_required(VERSION 3.5)
+
+idf_component_register(SRCS "Adafruit_I2CDevice.cpp" "Adafruit_BusIO_Register.cpp" "Adafruit_SPIDevice.cpp" 
+                       INCLUDE_DIRS "."
+                       REQUIRES arduino)
+
+project(Adafruit_BusIO)

firmware/libraries/Adafruit_BusIO/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2017 Adafruit Industries
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

firmware/libraries/Adafruit_BusIO/README.md

@@ -0,0 +1,8 @@
+# Adafruit Bus IO Library [![Build Status](https://github.com/adafruit/Adafruit_BusIO/workflows/Arduino%20Library%20CI/badge.svg)](https://github.com/adafruit/Adafruit_BusIO/actions)
+
+
+This is a helper library to abstract away I2C & SPI transactions and registers
+
+Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!
+
+MIT license, all text above must be included in any redistribution

firmware/libraries/Adafruit_BusIO/component.mk

@@ -0,0 +1 @@
+COMPONENT_ADD_INCLUDEDIRS = .

firmware/libraries/Adafruit_BusIO/examples/i2c_address_detect/i2c_address_detect.ino

@@ -0,0 +1,21 @@
+#include <Adafruit_I2CDevice.h>
+
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(0x10);
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("I2C address detection test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1);
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/examples/i2c_readwrite/i2c_readwrite.ino

@@ -0,0 +1,41 @@
+#include <Adafruit_I2CDevice.h>
+
+#define I2C_ADDRESS 0x60
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
+
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("I2C device read and write test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1);
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+
+  uint8_t buffer[32];
+  // Try to read 32 bytes
+  i2c_dev.read(buffer, 32);
+  Serial.print("Read: ");
+  for (uint8_t i=0; i<32; i++) {
+    Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
+  }
+  Serial.println();
+
+  // read a register by writing first, then reading
+  buffer[0] = 0x0C;  // we'll reuse the same buffer
+  i2c_dev.write_then_read(buffer, 1, buffer, 2, false);
+  Serial.print("Write then Read: ");
+  for (uint8_t i=0; i<2; i++) {
+    Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
+  }
+  Serial.println();
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/examples/i2c_registers/i2c_registers.ino

@@ -0,0 +1,38 @@
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_BusIO_Register.h>
+
+#define I2C_ADDRESS 0x60
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
+
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("I2C device register test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1);
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+
+  Adafruit_BusIO_Register id_reg = Adafruit_BusIO_Register(&i2c_dev, 0x0C, 2, LSBFIRST);
+  uint16_t id;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x"); Serial.println(id, HEX);
+
+  Adafruit_BusIO_Register thresh_reg = Adafruit_BusIO_Register(&i2c_dev, 0x01, 2, LSBFIRST);
+  uint16_t thresh;
+  thresh_reg.read(&thresh);
+  Serial.print("Initial threshold register = 0x"); Serial.println(thresh, HEX);
+
+  thresh_reg.write(~thresh);
+
+  Serial.print("Post threshold register = 0x"); Serial.println(thresh_reg.read(), HEX);
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/examples/i2corspi_register/i2corspi_register.ino

@@ -0,0 +1,38 @@
+#include <Adafruit_BusIO_Register.h>
+
+// Define which interface to use by setting the unused interface to NULL!
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice *spi_dev = NULL; // new Adafruit_SPIDevice(SPIDEVICE_CS);
+
+#define I2C_ADDRESS 0x5D
+Adafruit_I2CDevice *i2c_dev = new Adafruit_I2CDevice(I2C_ADDRESS);
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("I2C or SPI device register test");
+
+  if (spi_dev && !spi_dev->begin()) {
+    Serial.println("Could not initialize SPI device");
+  }
+
+  if (i2c_dev) {
+    if (i2c_dev->begin()) {
+      Serial.print("Device found on I2C address 0x");
+      Serial.println(i2c_dev->address(), HEX);
+    } else {
+      Serial.print("Did not find I2C device at 0x");
+      Serial.println(i2c_dev->address(), HEX);
+    }
+  }
+
+  Adafruit_BusIO_Register id_reg = Adafruit_BusIO_Register(i2c_dev, spi_dev, ADDRBIT8_HIGH_TOREAD, 0x0F);
+  uint8_t id=0;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x"); Serial.println(id, HEX);
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/examples/spi_modetest/spi_modetest.ino

@@ -0,0 +1,29 @@
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS, 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1);
+//Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS, 13, 12, 11, 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1);
+
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("SPI device mode test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1);
+  }
+}
+
+void loop() {
+  Serial.println("\n\nTransfer test");
+  for (uint16_t x=0; x<=0xFF; x++) {
+    uint8_t i = x;   
+    Serial.print("0x"); Serial.print(i, HEX); 
+    spi_dev.read(&i, 1, i);
+    Serial.print("/"); Serial.print(i, HEX);
+    Serial.print(", ");
+    delay(25);
+  }
+}

firmware/libraries/Adafruit_BusIO/examples/spi_readwrite/spi_readwrite.ino

@@ -0,0 +1,39 @@
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS);
+
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("SPI device read and write test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1);
+  }
+
+  uint8_t buffer[32];
+
+  // Try to read 32 bytes
+  spi_dev.read(buffer, 32);
+  Serial.print("Read: ");
+  for (uint8_t i=0; i<32; i++) {
+    Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
+  }
+  Serial.println();
+
+  // read a register by writing first, then reading
+  buffer[0] = 0x8F;  // we'll reuse the same buffer
+  spi_dev.write_then_read(buffer, 1, buffer, 2, false);
+  Serial.print("Write then Read: ");
+  for (uint8_t i=0; i<2; i++) {
+    Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
+  }
+  Serial.println();
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/examples/spi_register_bits/spi_register_bits.ino

@@ -0,0 +1,192 @@
+/*************************************************** 
+
+  This is an example for how to use Adafruit_BusIO_RegisterBits from Adafruit_BusIO library.
+
+  Designed specifically to work with the Adafruit RTD Sensor
+  ----> https://www.adafruit.com/products/3328
+  uisng a MAX31865 RTD-to-Digital Converter
+  ----> https://datasheets.maximintegrated.com/en/ds/MAX31865.pdf
+
+  This sensor uses SPI to communicate, 4 pins are required to  
+  interface.
+  A fifth pin helps to detect when a new conversion is ready.
+
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Example written (2020/3) by Andreas Hardtung/AnHard.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Adafruit_BusIO_Register.h>
+#include <Adafruit_SPIDevice.h>
+
+#define MAX31865_SPI_SPEED    (5000000)
+#define MAX31865_SPI_BITORDER (SPI_BITORDER_MSBFIRST)
+#define MAX31865_SPI_MODE     (SPI_MODE1)
+
+#define MAX31865_SPI_CS       (10)
+#define MAX31865_READY_PIN    (2)
+
+
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice( MAX31865_SPI_CS, MAX31865_SPI_SPEED, MAX31865_SPI_BITORDER, MAX31865_SPI_MODE, &SPI); // Hardware SPI
+// Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice( MAX31865_SPI_CS, 13, 12, 11, MAX31865_SPI_SPEED, MAX31865_SPI_BITORDER, MAX31865_SPI_MODE); // Software SPI
+
+// MAX31865 chip related *********************************************************************************************
+Adafruit_BusIO_Register     config_reg  = Adafruit_BusIO_Register(&spi_dev, 0x00, ADDRBIT8_HIGH_TOWRITE, 1, MSBFIRST);
+Adafruit_BusIO_RegisterBits   bias_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 7);
+Adafruit_BusIO_RegisterBits   auto_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 6);
+Adafruit_BusIO_RegisterBits   oneS_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 5);
+Adafruit_BusIO_RegisterBits   wire_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 4);
+Adafruit_BusIO_RegisterBits faultT_bits = Adafruit_BusIO_RegisterBits(&config_reg, 2, 2);
+Adafruit_BusIO_RegisterBits faultR_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 1);
+Adafruit_BusIO_RegisterBits fi50hz_bit  = Adafruit_BusIO_RegisterBits(&config_reg, 1, 0);
+
+Adafruit_BusIO_Register     rRatio_reg  = Adafruit_BusIO_Register(&spi_dev, 0x01, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits rRatio_bits = Adafruit_BusIO_RegisterBits(&rRatio_reg, 15, 1);
+Adafruit_BusIO_RegisterBits  fault_bit  = Adafruit_BusIO_RegisterBits(&rRatio_reg,  1, 0);
+
+Adafruit_BusIO_Register      maxRratio_reg = Adafruit_BusIO_Register(&spi_dev, 0x03, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits maxRratio_bits = Adafruit_BusIO_RegisterBits(&maxRratio_reg, 15, 1);
+
+Adafruit_BusIO_Register      minRratio_reg = Adafruit_BusIO_Register(&spi_dev, 0x05, ADDRBIT8_HIGH_TOWRITE, 2, MSBFIRST);
+Adafruit_BusIO_RegisterBits minRratio_bits = Adafruit_BusIO_RegisterBits(&minRratio_reg, 15, 1);
+
+Adafruit_BusIO_Register                fault_reg = Adafruit_BusIO_Register(&spi_dev, 0x07, ADDRBIT8_HIGH_TOWRITE, 1, MSBFIRST);
+Adafruit_BusIO_RegisterBits range_high_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 7);
+Adafruit_BusIO_RegisterBits  range_low_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 6);
+Adafruit_BusIO_RegisterBits refin_high_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 5);
+Adafruit_BusIO_RegisterBits  refin_low_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 4);
+Adafruit_BusIO_RegisterBits  rtdin_low_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 3);
+Adafruit_BusIO_RegisterBits    voltage_fault_bit = Adafruit_BusIO_RegisterBits(&fault_reg, 1, 2);
+
+// Print the details of the configuration register.
+void printConfig( void ) {
+  Serial.print("BIAS: ");         if (bias_bit.read() )   Serial.print("ON");   else Serial.print("OFF");
+  Serial.print(", AUTO: ");       if (auto_bit.read() )   Serial.print("ON");   else Serial.print("OFF");
+  Serial.print(", ONES: ");       if (oneS_bit.read() )   Serial.print("ON");   else Serial.print("OFF");
+  Serial.print(", WIRE: ");       if (wire_bit.read() )   Serial.print("3");    else Serial.print("2/4");
+  Serial.print(", FAULTCLEAR: "); if (faultR_bit.read() ) Serial.print("ON");   else Serial.print("OFF");
+  Serial.print(", ");             if (fi50hz_bit.read() ) Serial.print("50HZ"); else Serial.print("60HZ");
+  Serial.println();
+}
+
+// Check and print faults. Then clear them.
+void checkFaults( void ) {
+  if (fault_bit.read()) {
+    Serial.print("MAX: "); Serial.println(maxRratio_bits.read());
+    Serial.print("VAL: "); Serial.println(   rRatio_bits.read());
+    Serial.print("MIN: "); Serial.println(minRratio_bits.read());
+
+    if (range_high_fault_bit.read() ) Serial.println("Range high fault");
+    if ( range_low_fault_bit.read() ) Serial.println("Range low fault");
+    if (refin_high_fault_bit.read() ) Serial.println("REFIN high fault");
+    if ( refin_low_fault_bit.read() ) Serial.println("REFIN low fault");
+    if ( rtdin_low_fault_bit.read() ) Serial.println("RTDIN low fault");
+    if (   voltage_fault_bit.read() ) Serial.println("Voltage fault");
+
+    faultR_bit.write(1); // clear fault
+  }
+}
+
+void setup() {
+  #if (MAX31865_1_READY_PIN != -1)
+    pinMode(MAX31865_READY_PIN ,INPUT_PULLUP);
+  #endif
+
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("SPI Adafruit_BusIO_RegisterBits test on MAX31865");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1);
+  }
+
+  // Set up for automode 50Hz. We don't care about selfheating. We want the highest possible sampling rate.
+  auto_bit.write(0);   // Don't switch filtermode while auto_mode is on.
+  fi50hz_bit.write(1); // Set filter to 50Hz mode.
+  faultR_bit.write(1); // Clear faults.
+  bias_bit.write(1);   // In automode we want to have the bias current always on.
+  delay(5);            // Wait until bias current settles down.
+                       // 10.5 time constants of the input RC network is required.
+                       // 10ms worst case for 10kω reference resistor and a 0.1µF capacitor across the RTD inputs.
+                       // Adafruit Module has 0.1µF and only 430/4300ω So here 0.43/4.3ms
+  auto_bit.write(1);   // Now we can set automode. Automatically starting first conversion.
+
+  // Test the READY_PIN
+  #if (defined( MAX31865_READY_PIN ) && (MAX31865_READY_PIN != -1))
+    int i = 0;
+    while (digitalRead(MAX31865_READY_PIN) && i++ <= 100) { delay(1); }
+    if (i >= 100) {
+      Serial.print("ERROR: Max31865 Pin detection does not work. PIN:");
+      Serial.println(MAX31865_READY_PIN);
+    }
+  #else
+    delay(100);
+  #endif
+
+  // Set ratio range.
+  // Setting the temperatures would need some more calculation - not related to Adafruit_BusIO_RegisterBits.
+  uint16_t ratio = rRatio_bits.read();
+  maxRratio_bits.write( (ratio < 0x8fffu-1000u) ? ratio + 1000u : 0x8fffu ); 
+  minRratio_bits.write( (ratio >         1000u) ? ratio - 1000u : 0u      );
+
+  printConfig();
+  checkFaults();
+}
+
+void loop() {
+  #if (defined( MAX31865_READY_PIN ) && (MAX31865_1_READY_PIN != -1))
+    // Is conversion ready?
+    if (!digitalRead(MAX31865_READY_PIN))
+  #else
+    // Warant conversion is ready.
+    delay(21); // 21ms for 50Hz-mode. 19ms in 60Hz-mode.
+  #endif
+    {
+      // Read ratio, calculate temperature, scale, filter and print.
+      Serial.println( rRatio2C( rRatio_bits.read() ) * 100.0f, 0); // Temperature scaled by 100
+      // Check, print, clear faults.
+      checkFaults();
+    }
+
+  // Do something else.
+  //delay(15000);
+}
+
+
+// Module/Sensor related. Here Adafruit PT100 module with a 2_Wire PT100 Class C *****************************
+float rRatio2C(uint16_t ratio) {
+  // A simple linear conversion.
+  const float R0 = 100.0f;
+  const float Rref = 430.0f;
+  const float alphaPT = 0.003850f;
+  const float ADCmax = (1u << 15) - 1.0f;
+  const float rscale = Rref / ADCmax;
+  // Measured temperature in boiling water 101.08°C with factor a = 1 and b = 0. Rref and MAX at about 22±2°C.
+  // Measured temperature in ice/water bath 0.76°C with factor a = 1 and b = 0. Rref and MAX at about 22±2°C.
+  //const float a = 1.0f / (alphaPT * R0);
+  const float a = (100.0f/101.08f) / (alphaPT * R0);
+  //const float b = 0.0f;  // 101.08
+  const float b = -0.76f;  // 100.32 > 101.08
+
+  return filterRing( ((ratio * rscale) - R0) * a + b );
+}
+
+// General purpose *********************************************************************************************
+#define RINGLENGTH 250
+float filterRing( float newVal ) {
+  static float ring[RINGLENGTH] = { 0.0 };
+  static uint8_t ringIndex = 0;
+  static bool ringFull = false;
+
+  if ( ringIndex == RINGLENGTH ) { ringFull = true; ringIndex = 0; }
+  ring[ringIndex] = newVal;
+  uint8_t loopEnd = (ringFull) ? RINGLENGTH : ringIndex + 1;
+  float ringSum = 0.0f;
+  for (uint8_t i = 0;  i < loopEnd; i++) ringSum += ring[i];
+  ringIndex++;
+  return ringSum / loopEnd;
+}

firmware/libraries/Adafruit_BusIO/examples/spi_registers/spi_registers.ino

@@ -0,0 +1,34 @@
+#include <Adafruit_BusIO_Register.h>
+#include <Adafruit_SPIDevice.h>
+
+#define SPIDEVICE_CS 10
+Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS);
+
+void setup() {
+  while (!Serial) { delay(10); }
+  Serial.begin(115200);
+  Serial.println("SPI device register test");
+
+  if (!spi_dev.begin()) {
+    Serial.println("Could not initialize SPI device");
+    while (1);
+  }
+
+  Adafruit_BusIO_Register id_reg = Adafruit_BusIO_Register(&spi_dev, 0x0F, ADDRBIT8_HIGH_TOREAD);
+  uint8_t id = 0;
+  id_reg.read(&id);
+  Serial.print("ID register = 0x"); Serial.println(id, HEX);
+
+  Adafruit_BusIO_Register thresh_reg = Adafruit_BusIO_Register(&spi_dev, 0x0C, ADDRBIT8_HIGH_TOREAD, 2, LSBFIRST);
+  uint16_t thresh = 0;
+  thresh_reg.read(&thresh);
+  Serial.print("Initial threshold register = 0x"); Serial.println(thresh, HEX);
+
+  thresh_reg.write(~thresh);
+
+  Serial.print("Post threshold register = 0x"); Serial.println(thresh_reg.read(), HEX);
+}
+
+void loop() {
+  
+}

firmware/libraries/Adafruit_BusIO/library.properties

@@ -0,0 +1,9 @@
+name=Adafruit BusIO
+version=1.14.1
+author=Adafruit
+maintainer=Adafruit <info@adafruit.com>
+sentence=This is a library for abstracting away UART, I2C and SPI interfacing
+paragraph=This is a library for abstracting away UART, I2C and SPI interfacing
+category=Signal Input/Output
+url=https://github.com/adafruit/Adafruit_BusIO
+architectures=*

firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.cpp

@@ -0,0 +1,81 @@
+#include "Adafruit_Sensor.h"
+
+/**************************************************************************/
+/*!
+    @brief  Prints sensor information to serial console
+*/
+/**************************************************************************/
+void Adafruit_Sensor::printSensorDetails(void) {
+  sensor_t sensor;
+  getSensor(&sensor);
+  Serial.println(F("------------------------------------"));
+  Serial.print(F("Sensor:       "));
+  Serial.println(sensor.name);
+  Serial.print(F("Type:         "));
+  switch ((sensors_type_t)sensor.type) {
+  case SENSOR_TYPE_ACCELEROMETER:
+    Serial.print(F("Acceleration (m/s2)"));
+    break;
+  case SENSOR_TYPE_MAGNETIC_FIELD:
+    Serial.print(F("Magnetic (uT)"));
+    break;
+  case SENSOR_TYPE_ORIENTATION:
+    Serial.print(F("Orientation (degrees)"));
+    break;
+  case SENSOR_TYPE_GYROSCOPE:
+    Serial.print(F("Gyroscopic (rad/s)"));
+    break;
+  case SENSOR_TYPE_LIGHT:
+    Serial.print(F("Light (lux)"));
+    break;
+  case SENSOR_TYPE_PRESSURE:
+    Serial.print(F("Pressure (hPa)"));
+    break;
+  case SENSOR_TYPE_PROXIMITY:
+    Serial.print(F("Distance (cm)"));
+    break;
+  case SENSOR_TYPE_GRAVITY:
+    Serial.print(F("Gravity (m/s2)"));
+    break;
+  case SENSOR_TYPE_LINEAR_ACCELERATION:
+    Serial.print(F("Linear Acceleration (m/s2)"));
+    break;
+  case SENSOR_TYPE_ROTATION_VECTOR:
+    Serial.print(F("Rotation vector"));
+    break;
+  case SENSOR_TYPE_RELATIVE_HUMIDITY:
+    Serial.print(F("Relative Humidity (%)"));
+    break;
+  case SENSOR_TYPE_AMBIENT_TEMPERATURE:
+    Serial.print(F("Ambient Temp (C)"));
+    break;
+  case SENSOR_TYPE_OBJECT_TEMPERATURE:
+    Serial.print(F("Object Temp (C)"));
+    break;
+  case SENSOR_TYPE_VOLTAGE:
+    Serial.print(F("Voltage (V)"));
+    break;
+  case SENSOR_TYPE_CURRENT:
+    Serial.print(F("Current (mA)"));
+    break;
+  case SENSOR_TYPE_COLOR:
+    Serial.print(F("Color (RGBA)"));
+    break;
+  case SENSOR_TYPE_TVOC:
+    Serial.print(F("Total Volatile Organic Compounds (ppb)"));
+    break;
+  }
+
+  Serial.println();
+  Serial.print(F("Driver Ver:   "));
+  Serial.println(sensor.version);
+  Serial.print(F("Unique ID:    "));
+  Serial.println(sensor.sensor_id);
+  Serial.print(F("Min Value:    "));
+  Serial.println(sensor.min_value);
+  Serial.print(F("Max Value:    "));
+  Serial.println(sensor.max_value);
+  Serial.print(F("Resolution:   "));
+  Serial.println(sensor.resolution);
+  Serial.println(F("------------------------------------\n"));
+}

firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h

@@ -1,18 +1,18 @@
 /*
-* Copyright (C) 2008 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-* http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software< /span>
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software< /span>
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 /* Update by K. Townsend (Adafruit Industries) for lighter typedefs, and
  * extended sensor support to include color, voltage and current */
@@ -21,31 +21,35 @@
 #define _ADAFRUIT_SENSOR_H
 
 #ifndef ARDUINO
- #include <stdint.h>
+#include <stdint.h>
 #elif ARDUINO >= 100
- #include "Arduino.h"
- #include "Print.h"
+#include "Arduino.h"
+#include "Print.h"
 #else
- #include "WProgram.h"
+#include "WProgram.h"
 #endif
 
-/* Intentionally modeled after sensors.h in the Android API:
- * https://github.com/android/platform_hardware_libhardware/blob/master/include/hardware/sensors.h */
-
 /* Constants */
 #define SENSORS_GRAVITY_EARTH (9.80665F) /**< Earth's gravity in m/s^2 */
 #define SENSORS_GRAVITY_MOON (1.6F)      /**< The moon's gravity in m/s^2 */
 #define SENSORS_GRAVITY_SUN (275.0F)     /**< The sun's gravity in m/s^2 */
 #define SENSORS_GRAVITY_STANDARD (SENSORS_GRAVITY_EARTH)
-#define SENSORS_MAGFIELD_EARTH_MAX        (60.0F)                 /**< Maximum magnetic field on Earth's surface */
-#define SENSORS_MAGFIELD_EARTH_MIN        (30.0F)                 /**< Minimum magnetic field on Earth's surface */
-#define SENSORS_PRESSURE_SEALEVELHPA      (1013.25F)              /**< Average sea level pressure is 1013.25 hPa */
-#define SENSORS_DPS_TO_RADS               (0.017453293F)          /**< Degrees/s to rad/s multiplier */
-#define SENSORS_GAUSS_TO_MICROTESLA       (100)                   /**< Gauss to micro-Tesla multiplier */
+#define SENSORS_MAGFIELD_EARTH_MAX                                             \
+  (60.0F) /**< Maximum magnetic field on Earth's surface */
+#define SENSORS_MAGFIELD_EARTH_MIN                                             \
+  (30.0F) /**< Minimum magnetic field on Earth's surface */
+#define SENSORS_PRESSURE_SEALEVELHPA                                           \
+  (1013.25F) /**< Average sea level pressure is 1013.25 hPa */
+#define SENSORS_DPS_TO_RADS                                                    \
+  (0.017453293F) /**< Degrees/s to rad/s multiplier                            \
+                  */
+#define SENSORS_RADS_TO_DPS                                                    \
+  (57.29577793F) /**< Rad/s to degrees/s  multiplier */
+#define SENSORS_GAUSS_TO_MICROTESLA                                            \
+  (100) /**< Gauss to micro-Tesla multiplier */
 
 /** Sensor types */
-typedef enum
-{
+typedef enum {
   SENSOR_TYPE_ACCELEROMETER = (1), /**< Gravity + linear acceleration */
   SENSOR_TYPE_MAGNETIC_FIELD = (2),
   SENSOR_TYPE_ORIENTATION = (3),
@@ -54,63 +58,74 @@ typedef enum
   SENSOR_TYPE_PRESSURE = (6),
   SENSOR_TYPE_PROXIMITY = (8),
   SENSOR_TYPE_GRAVITY = (9),
-  SENSOR_TYPE_LINEAR_ACCELERATION   = (10),  /**< Acceleration not including gravity */
+  SENSOR_TYPE_LINEAR_ACCELERATION =
+      (10), /**< Acceleration not including gravity */
   SENSOR_TYPE_ROTATION_VECTOR = (11),
   SENSOR_TYPE_RELATIVE_HUMIDITY = (12),
   SENSOR_TYPE_AMBIENT_TEMPERATURE = (13),
+  SENSOR_TYPE_OBJECT_TEMPERATURE = (14),
   SENSOR_TYPE_VOLTAGE = (15),
   SENSOR_TYPE_CURRENT = (16),
-  SENSOR_TYPE_COLOR                 = (17)
+  SENSOR_TYPE_COLOR = (17),
+  SENSOR_TYPE_TVOC = (18)
 } sensors_type_t;
 
 /** struct sensors_vec_s is used to return a vector in a common format. */
 typedef struct {
   union {
-        float v[3];
+    float v[3]; ///< 3D vector elements
     struct {
-            float x;
-            float y;
-            float z;
-        };
+      float x; ///< X component of vector
+      float y; ///< Y component of vector
+      float z; ///< Z component of vector
+    };         ///< Struct for holding XYZ component
     /* Orientation sensors */
     struct {
-            float roll;    /**< Rotation around the longitudinal axis (the plane body, 'X axis'). Roll is positive and increasing when moving downward. -90°<=roll<=90° */
-            float pitch;   /**< Rotation around the lateral axis (the wing span, 'Y axis'). Pitch is positive and increasing when moving upwards. -180°<=pitch<=180°) */
-            float heading; /**< Angle between the longitudinal axis (the plane body) and magnetic north, measured clockwise when viewing from the top of the device. 0-359° */
-        };
-    };
-    int8_t status;
-    uint8_t reserved[3];
+      float roll; /**< Rotation around the longitudinal axis (the plane body, 'X
+                     axis'). Roll is positive and increasing when moving
+                     downward. -90 degrees <= roll <= 90 degrees */
+      float pitch;   /**< Rotation around the lateral axis (the wing span, 'Y
+                        axis'). Pitch is positive and increasing when moving
+                        upwards. -180 degrees <= pitch <= 180 degrees) */
+      float heading; /**< Angle between the longitudinal axis (the plane body)
+                        and magnetic north, measured clockwise when viewing from
+                        the top of the device. 0-359 degrees */
+    };               ///< Struct for holding roll/pitch/heading
+  };                 ///< Union that can hold 3D vector array, XYZ components or
+                     ///< roll/pitch/heading
+  int8_t status;     ///< Status byte
+  uint8_t reserved[3]; ///< Reserved
 } sensors_vec_t;
 
 /** struct sensors_color_s is used to return color data in a common format. */
 typedef struct {
   union {
-        float c[3];
+    float c[3]; ///< Raw 3-element data
     /* RGB color space */
     struct {
       float r;   /**< Red component */
       float g;   /**< Green component */
       float b;   /**< Blue component */
-        };
-    };
+    };           ///< RGB data in floating point notation
+  };             ///< Union of various ways to describe RGB colorspace
   uint32_t rgba; /**< 24-bit RGBA value */
 } sensors_color_t;
 
 /* Sensor event (36 bytes) */
-/** struct sensor_event_s is used to provide a single sensor event in a common format. */
-typedef struct
-{
+/** struct sensor_event_s is used to provide a single sensor event in a common
+ * format. */
+typedef struct {
   int32_t version;   /**< must be sizeof(struct sensors_event_t) */
   int32_t sensor_id; /**< unique sensor identifier */
   int32_t type;      /**< sensor type */
   int32_t reserved0; /**< reserved */
   int32_t timestamp; /**< time is in milliseconds */
-    union
-    {
-        float           data[4];
-        sensors_vec_t   acceleration;         /**< acceleration values are in meter per second per second (m/s^2) */
-        sensors_vec_t   magnetic;             /**< magnetic vector values are in micro-Tesla (uT) */
+  union {
+    float data[4];              ///< Raw data
+    sensors_vec_t acceleration; /**< acceleration values are in meter per second
+                                   per second (m/s^2) */
+    sensors_vec_t
+        magnetic; /**< magnetic vector values are in micro-Tesla (uT) */
     sensors_vec_t orientation; /**< orientation values are in degrees */
     sensors_vec_t gyro;        /**< gyroscope values are in rad/s */
     float temperature; /**< temperature is in degrees centigrade (Celsius) */
@@ -120,36 +135,55 @@ typedef struct
     float relative_humidity; /**< relative humidity in percent */
     float current;           /**< current in milliamps (mA) */
     float voltage;           /**< voltage in volts (V) */
+    float tvoc;              /**< Total Volatile Organic Compounds, in ppb */
     sensors_color_t color;   /**< color in RGB component values */
-    };
+  };                         ///< Union for the wide ranges of data we can carry
 } sensors_event_t;
 
 /* Sensor details (40 bytes) */
-/** struct sensor_s is used to describe basic information about a specific sensor. */
-typedef struct
-{
+/** struct sensor_s is used to describe basic information about a specific
+ * sensor. */
+typedef struct {
   char name[12];     /**< sensor name */
   int32_t version;   /**< version of the hardware + driver */
   int32_t sensor_id; /**< unique sensor identifier */
   int32_t type;      /**< this sensor's type (ex. SENSOR_TYPE_LIGHT) */
   float max_value;   /**< maximum value of this sensor's value in SI units */
   float min_value;   /**< minimum value of this sensor's value in SI units */
-    float    resolution;                      /**< smallest difference between two values reported by this sensor */
-    int32_t  min_delay;                       /**< min delay in microseconds between events. zero = not a constant rate */
+  float resolution; /**< smallest difference between two values reported by this
+                       sensor */
+  int32_t min_delay; /**< min delay in microseconds between events. zero = not a
+                        constant rate */
 } sensor_t;
 
+/** @brief Common sensor interface to unify various sensors.
+ * Intentionally modeled after sensors.h in the Android API:
+ * https://github.com/android/platform_hardware_libhardware/blob/master/include/hardware/sensors.h
+ */
 class Adafruit_Sensor {
- public:
+public:
   // Constructor(s)
   Adafruit_Sensor() {}
   virtual ~Adafruit_Sensor() {}
 
   // These must be defined by the subclass
-  virtual void enableAutoRange(bool enabled) { (void)enabled; /* suppress unused warning */ };
-  virtual bool getEvent(sensors_event_t*) = 0;
-  virtual void getSensor(sensor_t*) = 0;
 
- private:
+  /*! @brief Whether we should automatically change the range (if possible) for
+     higher precision
+      @param enabled True if we will try to autorange */
+  virtual void enableAutoRange(bool enabled) {
+    (void)enabled; /* suppress unused warning */
+  };
+
+  /*! @brief Get the latest sensor event
+      @returns True if able to fetch an event */
+  virtual bool getEvent(sensors_event_t *) = 0;
+  /*! @brief Get info about the sensor itself */
+  virtual void getSensor(sensor_t *) = 0;
+
+  void printSensorDetails(void);
+
+private:
   bool _autoRange;
 };
 

firmware/libraries/Adafruit_Unified_Sensor/LICENSE.txt

@@ -0,0 +1,202 @@
+
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firmware/libraries/Adafruit_Unified_Sensor/README.md

@@ -52,11 +52,11 @@ The following drivers are based on the Adafruit Unified Sensor Driver:
 
 Any driver that supports the Adafruit unified sensor abstraction layer will implement the Adafruit\_Sensor base class.  There are two main typedefs and one enum defined in Adafruit_Sensor.h that are used to 'abstract' away the sensor details and values:
 
-**Sensor Types (sensors\_type\_t)**
+## Sensor Types (`sensors_type_t`)
 
 These pre-defined sensor types are used to properly handle the two related typedefs below, and allows us determine what types of units the sensor uses, etc.
 
-```
+```c++
 /** Sensor types */
 typedef enum
 {
@@ -78,11 +78,11 @@ typedef enum
 } sensors_type_t;
 ```
 
-**Sensor Details (sensor\_t)**
+## Sensor Details (`sensor_t`)
 
 This typedef describes the specific capabilities of this sensor, and allows us to know what sensor we are using beneath the abstraction layer.
 
-```
+```c++
 /* Sensor details (40 bytes) */
 /** struct sensor_s is used to describe basic information about a specific sensor. */
 typedef struct
@@ -109,11 +109,11 @@ The individual fields are intended to be used as follows:
 - **resolution**: The smallest difference between two values that this sensor can report (in the appropriate SI unit)
 - **min\_delay**: The minimum delay in microseconds between two sensor events, or '0' if there is no constant sensor rate
 
-**Sensor Data/Events (sensors\_event\_t)**
+## Sensor Data/Events (`sensors_event_t`)
 
 This typedef is used to return sensor data from any sensor supported by the abstraction layer, using standard SI units and scales.
 
-```
+```c++
 /* Sensor event (36 bytes) */
 /** struct sensor_event_s is used to provide a single sensor event in a common format. */
 typedef struct
@@ -149,21 +149,21 @@ It includes the following fields:
 - **timestamp**: time in milliseconds when the sensor value was read
 - **data[4]**: An array of four 32-bit values that allows us to encapsulate any type of sensor data via a simple union (further described below)
 
-**Required Functions**
+## Required Functions
 
 In addition to the two standard types and the sensor type enum, all drivers based on Adafruit_Sensor must also implement the following two functions:
 
-```
+```c++
 bool getEvent(sensors_event_t*);
 ```
 Calling this function will populate the supplied sensors\_event\_t reference with the latest available sensor data.  You should call this function as often as you want to update your data.
 
-```
+```c++
 void getSensor(sensor_t*);
 ```
 Calling this function will provide some basic information about the sensor (the sensor name, driver version, min and max values, etc.
 
-**Standardised SI values for sensors\_event\_t**
+## Standardised SI values for `sensors_event_t`
 
 A key part of the abstraction layer is the standardisation of values on SI units of a particular scale, which is accomplished via the data[4] union in sensors\_event\_t above.  This 16 byte union includes fields for each main sensor type, and uses the following SI units and scales:
 
@@ -188,7 +188,7 @@ Every compliant sensor can now be read using a single, well-known 'type' (sensor
 
 An example of reading the [TSL2561](https://github.com/adafruit/Adafruit_TSL2561) light sensor can be seen below:
 
-```
+```c++
  Adafruit_TSL2561 tsl = Adafruit_TSL2561(TSL2561_ADDR_FLOAT, 12345);
  ...
  /* Get a new sensor event */ 
@@ -210,7 +210,7 @@ An example of reading the [TSL2561](https://github.com/adafruit/Adafruit_TSL2561
 
 Similarly, we can get the basic technical capabilities of this sensor with the following code:
 
-```
+```c++
  sensor_t sensor;
  
  sensor_t sensor;

firmware/libraries/Adafruit_Unified_Sensor/examples/sensortest/sensortest.ino

@@ -0,0 +1,153 @@
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_ADXL343.h>
+
+/* Assign a unique ID to this sensor at the same time */
+/* Uncomment following line for default Wire bus      */
+Adafruit_ADXL343 accel = Adafruit_ADXL343(12345);
+
+/* NeoTrellis M4, etc.                    */
+/* Uncomment following line for Wire1 bus */
+//Adafruit_ADXL343 accel = Adafruit_ADXL343(12345, &Wire1);
+
+void displaySensorDetails(void)
+{
+  sensor_t sensor;
+  accel.getSensor(&sensor);
+  Serial.println("------------------------------------");
+  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
+  Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
+  Serial.print  ("Unique ID:    "); Serial.println(sensor.sensor_id);
+  Serial.print  ("Max Value:    "); Serial.print(sensor.max_value); Serial.println(" m/s^2");
+  Serial.print  ("Min Value:    "); Serial.print(sensor.min_value); Serial.println(" m/s^2");
+  Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println(" m/s^2");
+  Serial.println("------------------------------------");
+  Serial.println("");
+  delay(500);
+}
+
+void displayDataRate(void)
+{
+  Serial.print  ("Data Rate:    ");
+
+  switch(accel.getDataRate())
+  {
+    case ADXL343_DATARATE_3200_HZ:
+      Serial.print  ("3200 ");
+      break;
+    case ADXL343_DATARATE_1600_HZ:
+      Serial.print  ("1600 ");
+      break;
+    case ADXL343_DATARATE_800_HZ:
+      Serial.print  ("800 ");
+      break;
+    case ADXL343_DATARATE_400_HZ:
+      Serial.print  ("400 ");
+      break;
+    case ADXL343_DATARATE_200_HZ:
+      Serial.print  ("200 ");
+      break;
+    case ADXL343_DATARATE_100_HZ:
+      Serial.print  ("100 ");
+      break;
+    case ADXL343_DATARATE_50_HZ:
+      Serial.print  ("50 ");
+      break;
+    case ADXL343_DATARATE_25_HZ:
+      Serial.print  ("25 ");
+      break;
+    case ADXL343_DATARATE_12_5_HZ:
+      Serial.print  ("12.5 ");
+      break;
+    case ADXL343_DATARATE_6_25HZ:
+      Serial.print  ("6.25 ");
+      break;
+    case ADXL343_DATARATE_3_13_HZ:
+      Serial.print  ("3.13 ");
+      break;
+    case ADXL343_DATARATE_1_56_HZ:
+      Serial.print  ("1.56 ");
+      break;
+    case ADXL343_DATARATE_0_78_HZ:
+      Serial.print  ("0.78 ");
+      break;
+    case ADXL343_DATARATE_0_39_HZ:
+      Serial.print  ("0.39 ");
+      break;
+    case ADXL343_DATARATE_0_20_HZ:
+      Serial.print  ("0.20 ");
+      break;
+    case ADXL343_DATARATE_0_10_HZ:
+      Serial.print  ("0.10 ");
+      break;
+    default:
+      Serial.print  ("???? ");
+      break;
+  }
+  Serial.println(" Hz");
+}
+
+void displayRange(void)
+{
+  Serial.print  ("Range:         +/- ");
+
+  switch(accel.getRange())
+  {
+    case ADXL343_RANGE_16_G:
+      Serial.print  ("16 ");
+      break;
+    case ADXL343_RANGE_8_G:
+      Serial.print  ("8 ");
+      break;
+    case ADXL343_RANGE_4_G:
+      Serial.print  ("4 ");
+      break;
+    case ADXL343_RANGE_2_G:
+      Serial.print  ("2 ");
+      break;
+    default:
+      Serial.print  ("?? ");
+      break;
+  }
+  Serial.println(" g");
+}
+
+void setup(void)
+{
+  Serial.begin(9600);
+  while (!Serial);
+  Serial.println("Accelerometer Test"); Serial.println("");
+
+  /* Initialise the sensor */
+  if(!accel.begin())
+  {
+    /* There was a problem detecting the ADXL343 ... check your connections */
+    Serial.println("Ooops, no ADXL343 detected ... Check your wiring!");
+    while(1);
+  }
+
+  /* Set the range to whatever is appropriate for your project */
+  accel.setRange(ADXL343_RANGE_16_G);
+  // accel.setRange(ADXL343_RANGE_8_G);
+  // accel.setRange(ADXL343_RANGE_4_G);
+  // accel.setRange(ADXL343_RANGE_2_G);
+
+  /* Display some basic information on this sensor */
+  displaySensorDetails();
+  displayDataRate();
+  displayRange();
+  Serial.println("");
+}
+
+void loop(void)
+{
+  /* Get a new sensor event */
+  sensors_event_t event;
+  accel.getEvent(&event);
+
+  /* Display the results (acceleration is measured in m/s^2) */
+  Serial.print("X: "); Serial.print(event.acceleration.x); Serial.print("  ");
+  Serial.print("Y: "); Serial.print(event.acceleration.y); Serial.print("  ");
+  Serial.print("Z: "); Serial.print(event.acceleration.z); Serial.print("  ");Serial.println("m/s^2 ");
+  delay(500);
+}

firmware/libraries/Adafruit_Unified_Sensor/library.properties

@@ -1,5 +1,5 @@
 name=Adafruit Unified Sensor
-version=1.0.3
+version=1.1.6
 author=Adafruit <info@adafruit.com>
 maintainer=Adafruit <info@adafruit.com>
 sentence=Required for all Adafruit Unified Sensor based libraries.
@@ -8,3 +8,4 @@ category=Sensors
 url=https://github.com/adafruit/Adafruit_Sensor
 architectures=*
 includes=Adafruit_Sensor.h
+

firmware/libraries/UrlEncode/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Masayuki Sugahara
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

firmware/libraries/UrlEncode/README.md

@@ -0,0 +1,11 @@
+# UrlEncode
+
+A simple library for URL encoding on Arduino framework.
+
+## Usage
+
+```cpp
+#include <UrlEncode.h>
+
+String encoded = urlEncode("http://example.com/path/to/file.html?param=value&param2=value2");
+```

firmware/libraries/UrlEncode/examples/Encode/Encode.ino

@@ -0,0 +1,11 @@
+#include <UrlEncode.h>
+
+void setup()
+{
+    Serial.begin(115200);
+
+    Serial.println(urlEncode("Hello, this string should be \% encoded."));
+    // -> Hello%2C%20this%20string%20should%20be%20%25%20encoded.
+}
+
+void loop() {}

firmware/libraries/UrlEncode/keywords.txt

@@ -0,0 +1 @@
+urlEncode   KEYWORD2

firmware/libraries/UrlEncode/library.properties

@@ -0,0 +1,10 @@
+name=UrlEncode
+version=1.0.0
+author=Masayuki Sugahara,equaaqua@hotmail.com
+maintainer=Masayuki Sugahara,equaaqua@hotmail.com
+sentence=Simple URL encoder (also known as percent encoding)
+paragraph=working with UTF-8 strings.
+category=Data Processing
+url=https://github.com/plageoj/urlencode
+architectures=*
+includes=UrlEncode.h

firmware/libraries/UrlEncode/src/UrlEncode.h

@@ -0,0 +1,37 @@
+#ifndef _PLAGEOJ_URLENCODE_H
+#define _PLAGEOJ_URLENCODE_H
+
+#include <Arduino.h>
+
+/**
+ * Percent-encodes a string.
+ * @param msg UTF-8 string to encode.
+ * @returns Percent-encoded string.
+ */
+inline String urlEncode(const char *msg)
+{
+    const char *hex = "0123456789ABCDEF";
+    String encodedMsg = "";
+
+    while (*msg != '\0')
+    {
+        if (('a' <= *msg && *msg <= 'z') || ('A' <= *msg && *msg <= 'Z') || ('0' <= *msg && *msg <= '9') || *msg == '-' || *msg == '_' || *msg == '.' || *msg == '~')
+        {
+            encodedMsg += *msg;
+        }
+        else
+        {
+            encodedMsg += '%';
+            encodedMsg += hex[*msg >> 4];
+            encodedMsg += hex[*msg & 0xf];
+        }
+        msg++;
+    }
+    return encodedMsg;
+}
+inline String urlEncode(String msg)
+{
+    return urlEncode(msg.c_str());
+}
+
+#endif

firmware/libraries/WiFiManager/README.md

@@ -26,7 +26,7 @@ Member to Member Support / Chat
 
  [![Join the chat at https://gitter.im/tablatronix/WiFiManager](https://badges.gitter.im/tablatronix/WiFiManager.svg)](https://gitter.im/tablatronix/WiFiManager?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
  
-[![Discord](https://img.shields.io/badge/Discord-WiFiManager-%237289da.svg?logo=discord)](https://discord.gg/dkjJbHwC)
+[![Discord](https://img.shields.io/badge/Discord-WiFiManager-%237289da.svg?logo=discord)](https://discord.gg/WgjVprfN)
 
 The configuration portal is of the captive variety, so on various devices it will present the configuration dialogue as soon as you connect to the created access point.
 

firmware/libraries/WiFiManager/WiFiManager.cpp

@@ -32,7 +32,7 @@ WiFiManagerParameter::WiFiManagerParameter(const char *custom) {
   _id             = NULL;
   _label          = NULL;
   _length         = 1;
-  _value          = NULL;
+  _value          = nullptr;
   _labelPlacement = WFM_LABEL_DEFAULT;
   _customHTML     = custom;
 }
@@ -58,6 +58,7 @@ void WiFiManagerParameter::init(const char *id, const char *label, const char *d
   _label          = label;
   _labelPlacement = labelPlacement;
   _customHTML     = custom;
+  _value          = nullptr;
   setValue(defaultValue,length);
 }
 
@@ -86,8 +87,14 @@ void WiFiManagerParameter::setValue(const char *defaultValue, int length) {
   //   // return false; //@todo bail 
   // }
 
+  if(_length != length){
     _length = length;
+    if( _value != nullptr){
+      delete[] _value;
+    }
     _value  = new char[_length + 1];  
+  }
+
   memset(_value, 0, _length + 1); // explicit null
   
   if (defaultValue != NULL) {
@@ -272,25 +279,30 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
   DEBUG_WM(F("AutoConnect"));
   #endif
 
+  bool wifiIsSaved = getWiFiIsSaved();
+
   #ifdef ESP32
-  if(WiFi.getMode() != WIFI_STA){
-    WiFi.mode(WIFI_STA);
+  setupHostname(true);
+
+  if(_hostname != ""){
+    // disable wifi if already on
+    if(WiFi.getMode() & WIFI_STA){
+      WiFi.mode(WIFI_OFF);
+      int timeout = millis()+1200;
+      // async loop for mode change
+      while(WiFi.getMode()!= WIFI_OFF && millis()<timeout){
+        delay(0);
+      }
+    }
   }
   #endif
 
-
-  if(getWiFiIsSaved()){
+  // check if wifi is saved, (has autoconnect) to speed up cp start
+  // NOT wifi init safe
+  // if(wifiIsSaved){
      _startconn = millis();
     _begin();
 
-    // sethostname before wifi ready
-    // https://github.com/tzapu/WiFiManager/issues/1403
-    #ifdef ESP32
-    if(_hostname != ""){
-      setupHostname(true);
-    }
-    #endif
-
     // attempt to connect using saved settings, on fail fallback to AP config portal
     if(!WiFi.enableSTA(true)){
       // handle failure mode Brownout detector etc.
@@ -354,12 +366,12 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
     #ifdef WM_DEBUG_LEVEL
     DEBUG_WM(F("AutoConnect: FAILED"));
     #endif
-  }
-  else {
-    #ifdef WM_DEBUG_LEVEL
-    DEBUG_WM(F("No Credentials are Saved, skipping connect"));
-    #endif
-  } 
+  // }
+  // else {
+    // #ifdef WM_DEBUG_LEVEL
+    // DEBUG_WM(F("No Credentials are Saved, skipping connect"));
+    // #endif
+  // } 
 
   // possibly skip the config portal
   if (!_enableConfigPortal) {
@@ -405,12 +417,20 @@ bool WiFiManager::setupHostname(bool restart){
   #elif defined(ESP32)
     // @note hostname must be set after STA_START
     // @note, this may have changed at some point, now it wont work, I have to set it before.
+    // same for S2, must set it before mode(STA) now
   
     #ifdef WM_DEBUG_LEVEL
     DEBUG_WM(DEBUG_VERBOSE,F("Setting WiFi hostname"));
     #endif
 
     res = WiFi.setHostname(_hostname.c_str());
+    // esp_err_t err;
+    //   // err = set_esp_interface_hostname(ESP_IF_WIFI_STA, "TEST_HOSTNAME");
+    //   err = esp_netif_set_hostname(esp_netifs[ESP_IF_WIFI_STA], "TEST_HOSTNAME");
+    //     if(err){
+    //         log_e("Could not set hostname! %d", err);
+    //         return false;
+    //     } 
     // #ifdef ESP32MDNS_H
       #ifdef WM_MDNS
         #ifdef WM_DEBUG_LEVEL
@@ -697,6 +717,9 @@ boolean  WiFiManager::startConfigPortal(char const *apName, char const *apPasswo
   // HANDLE issues with STA connections, shutdown sta if not connected, or else this will hang channel scanning and softap will not respond
   if(_disableSTA || (!WiFi.isConnected() && _disableSTAConn)){
     // this fixes most ap problems, however, simply doing mode(WIFI_AP) does not work if sta connection is hanging, must `wifi_station_disconnect` 
+    #ifdef WM_DISCONWORKAROUND
+      WiFi.mode(WIFI_AP_STA);
+    #endif
     WiFi_Disconnect();
     WiFi_enableSTA(false);
     #ifdef WM_DEBUG_LEVEL
@@ -704,7 +727,7 @@ boolean  WiFiManager::startConfigPortal(char const *apName, char const *apPasswo
     #endif
   }
   else {
-    WiFi_enableSTA(true);
+    // WiFi_enableSTA(true);
   }
 
   // init configportal globals to known states
@@ -765,6 +788,12 @@ boolean  WiFiManager::startConfigPortal(char const *apName, char const *apPasswo
       #endif
       shutdownConfigPortal();
       result = abort ? portalAbortResult : portalTimeoutResult; // false, false
+      if (_configportaltimeoutcallback != NULL) {
+        #ifdef WM_DEBUG_LEVEL
+        DEBUG_WM(DEBUG_VERBOSE,F("[CB] config portal timeout callback"));
+        #endif
+        _configportaltimeoutcallback();  // @CALLBACK
+      }
       break;
     }
 
@@ -809,16 +838,28 @@ boolean WiFiManager::process(){
         #endif
         webPortalActive = false;
         shutdownConfigPortal();
+        if (_configportaltimeoutcallback != NULL) {
+          #ifdef WM_DEBUG_LEVEL
+          DEBUG_WM(DEBUG_VERBOSE,F("[CB] config portal timeout callback"));
+          #endif
+          _configportaltimeoutcallback();  // @CALLBACK
+        }
         return false;
       }
 
-      uint8_t state = processConfigPortal();
+      uint8_t state = processConfigPortal(); // state is WL_IDLE or WL_CONNECTED/FAILED
       return state == WL_CONNECTED;
     }
     return false;
 }
 
-//using esp wl_status enums as returns for now, should be fine
+/**
+ * [processConfigPortal description]
+ * using esp wl_status enums as returns for now, should be fine
+ * returns WL_IDLE_STATUS or WL_CONNECTED/WL_CONNECT_FAILED upon connect/save flag
+ * 
+ * @return {[type]} [description]
+ */
 uint8_t WiFiManager::processConfigPortal(){
     if(configPortalActive){
       //DNS handler
@@ -1436,11 +1477,20 @@ bool WiFiManager::WiFi_scanNetworks(bool force,bool async){
     // DEBUG_WM(DEBUG_DEV,_numNetworks,(millis()-_lastscan ));
     // DEBUG_WM(DEBUG_DEV,"scanNetworks force:",force == true);
     #endif
-    if(_numNetworks == 0){
+
+    // if 0 networks, rescan @note this was a kludge, now disabling to test real cause ( maybe wifi not init etc)
+    // enable only if preload failed? 
+    if(_numNetworks == 0 && _autoforcerescan){
       DEBUG_WM(DEBUG_DEV,"NO APs found forcing new scan");
       force = true;
     }
-    if(force || (_lastscan>0 && (millis()-_lastscan > 60000))){
+
+    // if scan is empty or stale (last scantime > _scancachetime), this avoids fast reloading wifi page and constant scan delayed page loads appearing to freeze.
+    if(!_lastscan || (_lastscan>0 && (millis()-_lastscan > _scancachetime))){
+      force = true;
+    }
+
+    if(force){
       int8_t res;
       _startscan = millis();
       if(async && _asyncScan){
@@ -2329,7 +2379,7 @@ void WiFiManager::handleNotFound() {
  */
 boolean WiFiManager::captivePortal() {
   #ifdef WM_DEBUG_LEVEL
-  DEBUG_WM(DEBUG_DEV,"-> " + server->hostHeader());
+  DEBUG_WM(DEBUG_MAX,"-> " + server->hostHeader());
   #endif
   
   if(!_enableCaptivePortal) return false; // skip redirections, @todo maybe allow redirection even when no cp ? might be useful
@@ -2758,6 +2808,15 @@ void WiFiManager::setPreOtaUpdateCallback( std::function<void()> func ) {
   _preotaupdatecallback = func;
 }
 
+/**
+ * setConfigPortalTimeoutCallback, set a callback to config portal is timeout
+ * @access public
+ * @param {[type]} void (*func)(void)
+ */
+void WiFiManager::setConfigPortalTimeoutCallback( std::function<void()> func ) {
+  _configportaltimeoutcallback = func;
+}
+
 /**
  * set custom head html
  * custom element will be added to head, eg. new meta,style,script tag etc.
@@ -3307,8 +3366,10 @@ void WiFiManager::debugPlatformInfo(){
     #endif
   #elif defined(ESP32)
   #ifdef WM_DEBUG_LEVEL
-    DEBUG_WM(F("Free heap:       "), ESP.getFreeHeap());
+    DEBUG_WM(F("WM version: "),      WM_VERSION_STR);
+    DEBUG_WM(F("Arduino version: "), VER_ARDUINO_STR);
     DEBUG_WM(F("ESP SDK version: "), ESP.getSdkVersion());
+    DEBUG_WM(F("Free heap:       "), ESP.getFreeHeap());
     #endif
     // esp_chip_info_t chipInfo;
     // esp_chip_info(&chipInfo);
@@ -3600,7 +3661,7 @@ bool WiFiManager::WiFi_eraseConfig() {
       bool ret;
       WiFi.mode(WIFI_AP_STA); // cannot erase if not in STA mode !
       WiFi.persistent(true);
-      ret = WiFi.disconnect(true,true);
+      ret = WiFi.disconnect(true,true); // disconnect(bool wifioff, bool eraseap)
       delay(500);
       WiFi.persistent(false);
       return ret;
@@ -3715,7 +3776,7 @@ String WiFiManager::WiFi_psk(bool persistent) const {
         WiFi.reconnect();
       #endif
   }
-  else if(event == ARDUINO_EVENT_WIFI_SCAN_DONE){
+  else if(event == ARDUINO_EVENT_WIFI_SCAN_DONE && _asyncScan){
     uint16_t scans = WiFi.scanComplete();
     WiFi_scanComplete(scans);
   }
@@ -3768,7 +3829,8 @@ void WiFiManager::handleUpdating(){
   // combine route handlers into one callback and use argument or post checking instead of mutiple functions maybe, if POST process else server upload page?
   // [x] add upload checking, do we need too check file?
   // convert output to debugger if not moving to example
-	if (captivePortal()) return; // If captive portal redirect instead of displaying the page
+	
+  // if (captivePortal()) return; // If captive portal redirect instead of displaying the page
   bool error = false;
   unsigned long _configPortalTimeoutSAV = _configPortalTimeout; // store cp timeout
   _configPortalTimeout = 0; // disable timeout
@@ -3779,7 +3841,7 @@ void WiFiManager::handleUpdating(){
 
   // UPLOAD START
 	if (upload.status == UPLOAD_FILE_START) {
-	  if(_debug) Serial.setDebugOutput(true);
+	  // if(_debug) Serial.setDebugOutput(true);
     uint32_t maxSketchSpace;
     
     // Use new callback for before OTA update
@@ -3797,7 +3859,7 @@ void WiFiManager::handleUpdating(){
     #endif
 
     #ifdef WM_DEBUG_LEVEL
-    DEBUG_WM(DEBUG_VERBOSE,"Update file: ", upload.filename.c_str());
+    DEBUG_WM(DEBUG_VERBOSE,"[OTA] Update file: ", upload.filename.c_str());
     #endif
 
     // Update.onProgress(THandlerFunction_Progress fn);
@@ -3833,7 +3895,7 @@ void WiFiManager::handleUpdating(){
       #endif
 		}
     else {
-			Update.printError(Serial);
+			// Update.printError(Serial);
       error = true;
 		}
 	}
@@ -3850,7 +3912,7 @@ void WiFiManager::handleUpdating(){
 // upload and ota done, show status
 void WiFiManager::handleUpdateDone() {
 	DEBUG_WM(DEBUG_VERBOSE, F("<- Handle update done"));
-	if (captivePortal()) return; // If captive portal redirect instead of displaying the page
+	// if (captivePortal()) return; // If captive portal redirect instead of displaying the page
 
 	String page = getHTTPHead(FPSTR(S_options)); // @token options
 	String str  = FPSTR(HTTP_ROOT_MAIN);

firmware/libraries/WiFiManager/WiFiManager.h

@@ -39,8 +39,9 @@
 #define WM_NOSOFTAPSSID    // no softapssid() @todo shim
 #endif
 
-#ifdef ARDUINO_ESP32S3_DEV
-#define WM_NOTEMP
+// #ifdef ARDUINO_ESP32S3_DEV
+#ifdef ESP32
+#define WM_NOTEMP // disabled temp sensor, have to determine which chip we are on
 #endif
 
 // #include "soc/efuse_reg.h" // include to add efuse chip rev to info, getChipRevision() is almost always the same though, so not sure why it matters.
@@ -52,31 +53,6 @@
 
 #define WM_G(string_literal)  (String(FPSTR(string_literal)).c_str())
 
-#define WM_STRING2(x) #x
-#define WM_STRING(x) STRING2(x)    
-
-// #include <esp_idf_version.h>
-#ifdef ESP_IDF_VERSION
-    // #pragma message "ESP_IDF_VERSION_MAJOR = " WM_STRING(ESP_IDF_VERSION_MAJOR)
-    // #pragma message "ESP_IDF_VERSION_MINOR = " WM_STRING(ESP_IDF_VERSION_MINOR)
-    // #pragma message "ESP_IDF_VERSION_PATCH = " WM_STRING(ESP_IDF_VERSION_PATCH)
-    #define VER_IDF_STR WM_STRING(ESP_IDF_VERSION_MAJOR)  "."  WM_STRING(ESP_IDF_VERSION_MINOR)  "."  WM_STRING(ESP_IDF_VERSION_PATCH)
-#endif
-
-// #include "esp_arduino_version.h"
-#ifdef ESP_ARDUINO_VERSION
-    // #pragma message "ESP_ARDUINO_VERSION_MAJOR = " WM_STRING(ESP_ARDUINO_VERSION_MAJOR)
-    // #pragma message "ESP_ARDUINO_VERSION_MINOR = " WM_STRING(ESP_ARDUINO_VERSION_MINOR)
-    // #pragma message "ESP_ARDUINO_VERSION_PATCH = " WM_STRING(ESP_ARDUINO_VERSION_PATCH)
-    #define VER_ARDUINO_STR WM_STRING(ESP_ARDUINO_VERSION_MAJOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_MINOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_PATCH)
-#else
-    // #include <core_version.h>
-    // #pragma message "ESP_ARDUINO_VERSION_GIT  = " WM_STRING(ARDUINO_ESP32_GIT_VER)//  0x46d5afb1
-    // #pragma message "ESP_ARDUINO_VERSION_DESC = " WM_STRING(ARDUINO_ESP32_GIT_DESC) //  1.0.6
-    #define VER_ARDUINO_STR "Unknown"
-    // #pragma message "ESP_ARDUINO_VERSION_REL  = " WM_STRING(ARDUINO_ESP32_RELEASE) //"1_0_6"
-#endif
-
 #ifdef ESP8266
 
     extern "C" {
@@ -131,6 +107,46 @@
 #include <memory>
 #include "strings_en.h"
 
+// prep string concat vars
+#define WM_STRING2(x) #x
+#define WM_STRING(x) WM_STRING2(x)    
+
+
+// #include <esp_idf_version.h>
+#ifdef ESP_IDF_VERSION
+    // #pragma message "ESP_IDF_VERSION_MAJOR = " WM_STRING(ESP_IDF_VERSION_MAJOR)
+    // #pragma message "ESP_IDF_VERSION_MINOR = " WM_STRING(ESP_IDF_VERSION_MINOR)
+    // #pragma message "ESP_IDF_VERSION_PATCH = " WM_STRING(ESP_IDF_VERSION_PATCH)
+    #define VER_IDF_STR WM_STRING(ESP_IDF_VERSION_MAJOR)  "."  WM_STRING(ESP_IDF_VERSION_MINOR)  "."  WM_STRING(ESP_IDF_VERSION_PATCH)
+#else 
+    #define VER_IDF_STR "Unknown"
+#endif
+
+#ifdef Arduino_h
+    #ifdef ESP32
+    #include "esp_arduino_version.h"
+    #endif
+    // esp_get_idf_version
+    #ifdef ESP_ARDUINO_VERSION
+        // #pragma message "ESP_ARDUINO_VERSION_MAJOR = " WM_STRING(ESP_ARDUINO_VERSION_MAJOR)
+        // #pragma message "ESP_ARDUINO_VERSION_MINOR = " WM_STRING(ESP_ARDUINO_VERSION_MINOR)
+        // #pragma message "ESP_ARDUINO_VERSION_PATCH = " WM_STRING(ESP_ARDUINO_VERSION_PATCH)
+        #define VER_ARDUINO_STR WM_STRING(ESP_ARDUINO_VERSION_MAJOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_MINOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_PATCH)
+    #else
+        #include <core_version.h>
+        // #pragma message "ESP_ARDUINO_VERSION_GIT  = " WM_STRING(ARDUINO_ESP32_GIT_VER)//  0x46d5afb1
+        // #pragma message "ESP_ARDUINO_VERSION_DESC = " WM_STRING(ARDUINO_ESP32_GIT_DESC) //  1.0.6
+        // #pragma message "ESP_ARDUINO_VERSION_REL  = " WM_STRING(ARDUINO_ESP32_RELEASE) //"1_0_6"
+        #define VER_ARDUINO_STR WM_STRING(ESP_ARDUINO_VERSION_MAJOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_MINOR)  "."  WM_STRING(ESP_ARDUINO_VERSION_PATCH)
+    #endif
+#else 
+#define VER_ARDUINO_STR "Unknown"
+#endif
+
+
+// #pragma message "VER_IDF_STR = " WM_STRING(VER_IDF_STR)
+// #pragma message "VER_ARDUINO_STR = " WM_STRING(VER_ARDUINO_STR)
+
 #ifndef WIFI_MANAGER_MAX_PARAMS
     #define WIFI_MANAGER_MAX_PARAMS 5 // params will autoincrement and realloc by this amount when max is reached
 #endif
@@ -260,6 +276,9 @@ class WiFiManager
     //called just before doing OTA update
     void          setPreOtaUpdateCallback( std::function<void()> func );
 
+    //called when config portal is timeout
+    void          setConfigPortalTimeoutCallback( std::function<void()> func );
+
     //sets timeout before AP,webserver loop ends and exits even if there has been no setup.
     //useful for devices that failed to connect at some point and got stuck in a webserver loop
     //in seconds setConfigPortalTimeout is a new name for setTimeout, ! not used if setConfigPortalBlocking
@@ -544,9 +563,16 @@ class WiFiManager
     // async enables asyncronous scans, so they do not block anything
     // the refresh button bypasses cache
     // no aps found is problematic as scans are always going to want to run, leading to page load delays
-    boolean       _preloadwifiscan        = false;  // preload wifiscan if true
-    boolean       _asyncScan              = false; // perform wifi network scan async
-    unsigned int  _scancachetime          = 30000; // ms cache time for background scans
+    // 
+    // These settings really only make sense with _preloadwifiscan true
+    // but not limited to, we could run continuous background scans on various page hits, or xhr hits
+    // which would be better coupled with asyncscan
+    // atm preload is only done on root hit and startcp
+    boolean       _preloadwifiscan        = true; // preload wifiscan if true
+    unsigned int  _scancachetime          = 30000; // ms cache time for preload scans
+    boolean       _asyncScan              = true; // perform wifi network scan async
+
+    boolean       _autoforcerescan        = false;  // automatically force rescan if scan networks is 0, ignoring cache
     
     boolean       _disableIpFields        = false; // modify function of setShow_X_Fields(false), forces ip fields off instead of default show if set, eg. _staShowStaticFields=-1
 
@@ -633,6 +659,7 @@ class WiFiManager
     #if defined(ESP_ARDUINO_VERSION) && defined(ESP_ARDUINO_VERSION_VAL)
 
         #define WM_ARDUINOVERCHECK ESP_ARDUINO_VERSION >= ESP_ARDUINO_VERSION_VAL(2, 0, 0)
+        #define WM_ARDUINOVERCHECK_204 ESP_ARDUINO_VERSION <= ESP_ARDUINO_VERSION_VAL(2, 0, 5)
 
         #ifdef WM_ARDUINOVERCHECK
             #define WM_ARDUINOEVENTS
@@ -641,6 +668,10 @@ class WiFiManager
             #define WM_NOCOUNTRY
         #endif
 
+        #ifdef WM_ARDUINOVERCHECK_204
+            #define WM_DISCONWORKAROUND
+        #endif
+
     #else 
         #define WM_NOCOUNTRY
     #endif
@@ -748,6 +779,7 @@ class WiFiManager
     std::function<void()> _saveparamscallback;
     std::function<void()> _resetcallback;
     std::function<void()> _preotaupdatecallback;
+    std::function<void()> _configportaltimeoutcallback;
 
     template <class T>
     auto optionalIPFromString(T *obj, const char *s) -> decltype(  obj->fromString(s)  ) {

firmware/libraries/WiFiManager/examples/Basic/Basic.ino

@@ -2,7 +2,7 @@
 
 
 void setup() {
-    WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
+    // WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
     // it is a good practice to make sure your code sets wifi mode how you want it.
 
     // put your setup code here, to run once:
@@ -13,7 +13,7 @@ void setup() {
 
     // reset settings - wipe stored credentials for testing
     // these are stored by the esp library
-    wm.resetSettings();
+    // wm.resetSettings();
 
     // Automatically connect using saved credentials,
     // if connection fails, it starts an access point with the specified name ( "AutoConnectAP"),

firmware/libraries/WiFiManager/examples/Super/OnDemandConfigPortal/OnDemandConfigPortal.ino

@@ -88,11 +88,10 @@ void handlePreOtaUpdateCallback(){
 }
 
 void setup() {
-  // WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
+  // WiFi.mode(WIFI_STA); // explicitly set mode, esp can default to STA+AP
   
   // put your setup code here, to run once:
   Serial.begin(115200);
-  // Serial1.begin(115200);
 
   // Serial.setDebugOutput(true);
 
@@ -219,11 +218,11 @@ void setup() {
   // setting wifi country seems to improve OSX soft ap connectivity, 
   // may help others as well, default is CN which has different channels
 
-  wm.setCountry("US"); // crashing on esp32 2.0
+  // wm.setCountry("US"); // crashing on esp32 2.0
 
   // set Hostname
 
-  // wm.setHostname(("WM_"+wm.getDefaultAPName()).c_str());
+  wm.setHostname(("WM_"+wm.getDefaultAPName()).c_str());
   // wm.setHostname("WM_RANDO_1234");
 
   // set custom channel
@@ -388,7 +387,7 @@ void getTime() {
   }
   Serial.println("");
   struct tm timeinfo;
-  gmtime_r(&now, &timeinfo); // @NOTE doesnt work in esp2.3.0
+  gmtime_r(&now, &timeinfo);
   Serial.print("Current time: ");
   Serial.print(asctime(&timeinfo));
 }

firmware/libraries/WiFiManager/examples/Tests/wifi_softap/wifi_softap.ino

@@ -0,0 +1,51 @@
+// wifi_basic.ino
+
+#include <Arduino.h>
+#include <WiFi.h>
+
+// #define NVSERASE
+#ifdef NVSERASE
+#include <nvs.h>
+#include <nvs_flash.h>
+#endif
+
+void setup(){
+    Serial.begin(115200);
+    delay(2000);
+    Serial.println("Startup....");
+
+    #ifdef NVSERASE
+        esp_err_t err;
+        err = nvs_flash_init();
+        err = nvs_flash_erase();
+    #endif
+
+    Serial.setDebugOutput(true);
+
+    WiFi.begin("hellowifi","noonehere");
+    
+    while (WiFi.status() != WL_CONNECTED && millis()<15000) {
+        delay(500);
+        Serial.print(".");
+    }
+    
+    if(WiFi.status() == WL_CONNECTED){
+        Serial.println("");
+        Serial.println("WiFi connected.");
+        Serial.println("IP address: ");
+        // Serial.println(WiFi.localIP());
+    }
+    else {
+        Serial.println("WiFi NOT CONNECTED, starting ap");
+        ///////////////
+        /// BUG
+        // WiFi.enableSTA(false); // BREAKS softap start, says ok BUT no ap found
+        
+        delay(2000);    
+        WiFi.softAP("espsoftap","12345678");
+    }
+}
+
+void loop(){
+
+}

firmware/libraries/WiFiManager/library.json

@@ -1,6 +1,6 @@
 {
   "name": "WiFiManager",
-  "version": "2.0.12-beta",
+  "version": "2.0.13-beta",
   "keywords": "wifi,wi-fi,esp,esp8266,esp32,espressif8266,espressif32,nodemcu,wemos,arduino",
   "description": "WiFi Configuration manager with web configuration portal for ESP boards",
   "authors":

firmware/libraries/WiFiManager/library.properties

@@ -1,5 +1,5 @@
 name=WiFiManager
-version=2.0.12-beta
+version=2.0.13-beta
 author=tzapu
 maintainer=tablatronix
 sentence=WiFi Configuration manager with web configuration portal for Espressif ESPx boards, by tzapu

firmware/libraries/WiFiManager/strings_en.h

@@ -17,7 +17,7 @@
 #ifndef WIFI_MANAGER_OVERRIDE_STRINGS
 // !!! ABOVE WILL NOT WORK if you define in your sketch, must be build flag, if anyone one knows how to order includes to be able to do this it would be neat.. I have seen it done..
 
-const char WM_VERSION_STR[] PROGMEM = "v2.0.12-beta";
+const char WM_VERSION_STR[] PROGMEM = "v2.0.13-beta";
 
 const char HTTP_HEAD_START[]       PROGMEM = "<!DOCTYPE html>"
 "<html lang='en'><head>"