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weatherstation/firmware/firmware.ino

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// Standard ESP8266 libs from project folder
#include <ESP8266mDNS.h>
#include <ESP8266HTTPUpdateServer.h>
#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h> // WiFiClient
#include <WiFiManager.h> // WiFiManager from bib manager
// Project includes
#include "constants.h"
#include "config.h"
#include "config_user.h"
//*************************************************************************//
// check if some settings are correct
#ifdef HTTP_CALL_ON_WINDSPEED_EXCEED
#if (HTTP_CALL_ON_WINDSPEED_INTERVAL_S < WIND_SENSOR_MEAS_TIME_S)
#error "HTTP_CALL_ON_WINDSPEED_INTERVAL_S < WIND_SENSOR_MEAS_TIME_S"
#endif
#endif
//*************************************************************************//
// constant variables
const uint8_t VALUES = 8; // see constants.h file - count of number of SENSOR_ defines
float currentSensorData[VALUES] = { nanf("no value"), nanf("no value"), nanf("no value"),
nanf("no value"), nanf("no value"), nanf("no value"),
nanf("no value"), nanf("no value") };
uint32_t update_sensor_cnt = 0;
uint32_t update_webserver_cnt = 0;
uint32_t update_windspeed_exceed_cnt = 0;
uint32_t wifi_check_interval_counter = 0;
const String wifiName = "oko-weather-" + DEVICE_NAME;
WiFiManager wifiManager;
uint8_t fsm_state = FSM_STATE_1;
uint8_t sensor_cnt = 0;
boolean validData = false;
boolean do_not_read_windsensor = false;
//*************************************************************************//
void debug(String x)
{
#ifdef DEBUG
Serial.println(x);
#endif
#ifdef USE_LOGGER
logdata(String(millis()) + ":" + x);
#endif
}
//*************************************************************************//
void setup()
{
#if defined(DEBUG) || defined(SERIAL_FEATURE)
Serial.begin(SERIAL_BARD_RATE);
#endif
// Pin settings
pinMode(BAT_CHARGED_PIN, INPUT);
pinMode(BAT_CHARGING_PIN, INPUT);
pinMode(STATUS_LED_PIN, OUTPUT);
pinMode(ANEMOMETER_PIN, INPUT_PULLUP);
pinMode(A0, INPUT);
digitalWrite(STATUS_LED_PIN, LOW);
#ifndef BAT_PINS_D34
debug("D5 D6 used as battery pins");
#else
debug("D3 D4 used as battery pins");
#endif
#ifdef BATTERY_POWERED
criticalBatCheck();
#endif
wifiConnect();
debug("Connected!");
#ifdef INFLUXDB_FEATURE
influxdb_begin();
#endif
initSensors();
#ifdef WEBUPDATER_FEATURE
#ifndef BATTERY_POWERED
setupWebUpdater(DEVICE_NAME, WiFi.localIP().toString());
#endif
#endif
//It's magic! leave in
delay(100);
#ifdef BATTERY_POWERED
debug("battery powered");
_battery_mode_main();
digitalWrite(STATUS_LED_PIN, LOW);
criticalBatCheck();
WiFi.mode(WIFI_OFF);
WiFi.forceSleepBegin();
debug("deep sleep");
// the ESP.deepSleep requires microseconds as input, after the
// sleep the system will run into the setup routine
ESP.deepSleep(POWERSAVING_SLEEP_S * 1000000, WAKE_RF_DEFAULT);
delay(100);
#else // not in battery mode
#ifdef ENABLE_WATCHDOG
// Enable the internal watchdog
ESP.wdtEnable(WATCHDOG_TIMEOUT_MS);
#endif
#endif
}
//*************************************************************************//
void initSensors()
{
// Initialize and configure the sensors
#ifdef SENSOR_APDS9930
if (sensor_apds9930_begin();
#endif
#ifdef SENSOR_APDS9960
sensor_apds9960_begin();
#endif
#ifdef SENSOR_BME280
//Temperature + pressure
sensor_bme280_begin(BME_ADDRESS);
#endif
}
float readSensors(uint8_t s)
{
float ret = nan("no value");
switch(s)
{
case SENSOR_LIGHT: // Initialize and configure the sensors
#ifdef SENSOR_APDS9930
ret = apds9930_light();
#endif
#ifdef SENSOR_APDS9960
ret = apds9960_light();
#endif
break;
case SENSOR_TEMPERATURE:
#ifdef SENSOR_BME280
ret = bme280_temperature();
#endif
break;
case SENSOR_HUMIDITY:
#ifdef SENSOR_BME280
ret = bme280_humidity();
#endif
break;
case SENSOR_PRESSURE:
#ifdef SENSOR_BME280
ret = bme280_pressure();
#endif
break;
case SENSOR_WINDSPEED:
#ifdef SENSOR_WIND
if (do_not_read_windsensor == false)
{
ret = wind_speed();
}
#endif
break;
case SENSOR_BAT_VOLTAGE:
#ifdef SENSOR_BATTERY
ret = battery_voltage();
#endif
break;
case SENSOR_ESAVEMODE:
#ifdef SENSOR_BATTERY
ret = battery_charging();
#endif
break;
case SENSOR_BATCHARGESTATE:
#ifdef SENSOR_BATTERY
ret = isEnergySavingMode();
#endif
break;
default:
break;
}
return ret;
}
//*************************************************************************//
void wifiConnectionCheck()
{
if ((wifi_check_interval_counter + WIFI_CHECK_INTERVAL_MS) > millis())
{
// if check interval is not exceeded abort check
return;
}
wifi_check_interval_counter = millis();
if (WiFi.status() == WL_CONNECTED)
{
// if we are connected
return;
}
debug("no wifi connection, try to reconnect");
wifiConnect();
}
void wifiConnect()
{
// Establish WiFi connection if not already applied
wifiManager.setMinimumSignalQuality(WIFI_MINIMUM_SIGNAL_QUALITY);
// the time in seconds to wait for the known wifi connection
wifiManager.setConnectTimeout(WIFI_AUTOCONNECT_TIMEOUT_S);
// the time in seconds to wait for the user to configure the device
wifiManager.setTimeout(WIFI_CONFIG_PORTAL_TIMEOUT_S);
while (!wifiManager.autoConnect(wifiName.c_str(), "DEADBEEF"))
{
#ifdef SLEEP_IF_NO_WLAN_CONNECTION
// If autoconnect to WLAN failed and no client connected, go to deep sleep
ESP.deepSleep(POWERSAVING_SLEEP_S * 1000000, WAKE_RF_DEFAULT);
delay(100);
#endif
#ifndef SLEEP_IF_NO_WLAN_CONNECTION
// sleep a few seconds and go on trying to connect
debug("WiFi connection failed, try again in 5 seconds...");
delay(5000);
#endif
}
}
//*************************************************************************//
#ifdef BATTERY_POWERED
void criticalBatCheck()
{
float volt = battery_voltage();
if (volt <= BAT_EMERGENCY_DEEPSLEEP_VOLTAGE)
{
debug("Bat Voltage: " + String(volt) + " V");
debug("Low battery, going into deep sleep.");
// Casting to an unsigned int, so it fits into the integer range
ESP.deepSleep(1U * EMERGENCY_SLEEP_S * 1000000); // battery low, shutting down
delay(100);
}
}
#endif
//*************************************************************************//
void loop()
{
#ifdef ENABLE_WATCHDOG
ESP.wdtFeed();
#endif
#ifdef BATTERY_POWERED
delay(50);
return;
#else
// call fsm loop function
_fsm_loop();
// Needed to give WIFI time to function properly
delay(DELAY_LOOP_MS);
#endif
}
//*************************************************************************//
#ifndef BATTERY_POWERED
void _fsm_loop()
{
#ifdef WEBUPDATER_FEATURE
if ((update_webserver_cnt + (UPDATE_WEBSERVER_INTVERVAL_S * 1000)) <= millis())
{
//debug("web updater call");
update_webserver_cnt = millis();
doWebUpdater();
}
#endif
switch (fsm_state)
{
/* -------------------------------------------------------------------------------- */
case FSM_STATE_1:
//debug("wind speed exceeded check if required");
#ifdef HTTP_CALL_ON_WINDSPEED_EXCEED
if ((update_windspeed_exceed_cnt + (HTTP_CALL_ON_WINDSPEED_INTERVAL_S * 1000)) <= millis())
{
debug("reading wind sensor exceed");
// reset the wait timer to get a value every HTTP_CALL_ON_WINDSPEED_INTERVAL_S independently to the runtime of the measurement
update_windspeed_exceed_cnt = millis();
start_measure_wind(); // start measurement of wind speed
fsm_state = FSM_STATE_11; // wait untile the wind meas time exceeded
break; // abort case here to prevent read of next sensor in list
}
#endif
fsm_state = FSM_STATE_2;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_2:
//debug("reset time check if required");
#ifdef RESET_ESP_TIME_INTERVAL
// if millis() reached interval restart ESP
if (RESET_ESP_TIME_INTERVAL_MS <= millis())
{
debug("resetting firmware intentionally");
// Push reset button after flashing once or do a manual power cycle to get the functionality working.
ESP.restart();
}
#endif
fsm_state = FSM_STATE_3;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_3:
wifiConnectionCheck();
fsm_state = FSM_STATE_4;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_4:
//debug("disable measure of wind speed if required");
#ifdef defined(BATTERY_POWERED) && defined(SENSOR_WIND)
if (energySavingMode() == 1)
{
// Disable expensive tasks
//sensors[SENSOR_WINDSPEED] = 0;
//debug("read of wind sensor because of low battery disabled");
do_not_read_windsensor = true;
} else {
//sensors[SENSOR_WINDSPEED] = &wind_speed;
//debug("read of wind sensor because of high battery enabled");
do_not_read_windsensor = false;
}
#endif
sensor_cnt = 0;
fsm_state = FSM_STATE_5;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_5:
//debug("read sensor data check");
if ((update_sensor_cnt + (UPDATE_SENSOR_INTERVAL_S * 1000)) <= millis())
{
debug("read sensor data " + String(sensor_cnt));
if (sensor_cnt != SENSOR_WINDSPEED)
{
// read data from sensor
currentSensorData[sensor_cnt] = readSensors(sensor_cnt);
} else {
start_measure_wind(); // start measurement of wind speed
fsm_state = FSM_STATE_9; // wait untile the wind meas time exceeded
break; // abort case here to prevent read of next sensor in list
}
if (sensor_cnt < VALUES)
{
sensor_cnt++;
fsm_state = FSM_STATE_5; // jump to same state again, more sensors to read
} else {
update_sensor_cnt = millis(); // reset the update interval counter
sensor_cnt = 0;
fsm_state = FSM_STATE_6; // next state
}
} else {
//debug("skip read sensor data");
fsm_state = FSM_STATE_1; // no new data, reset FSM
}
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_6:
//debug("log to serial if required");
#ifdef SERIAL_FEATURE
logToSerial(currentSensorData);
#endif
fsm_state = FSM_STATE_7;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_7:
//debug("send data to influxdb if required");
#ifdef INFLUXDB_FEATURE
for (uint8_t i = 0; i < 5 and validData == false; i++)
{
if (currentSensorData[i] != 0)
{
validData = true;
}
}
if (validData == true)
{
// send data only if valid data is available
pushToInfluxDB(DEVICE_NAME, currentSensorData);
}
#endif
fsm_state = FSM_STATE_8;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_8:
//debug("set sensor data in webupdater if required");
#ifdef WEBUPDATER_FEATURE
setSensorData(currentSensorData);
#endif
fsm_state = FSM_STATE_1;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_9:
#ifdef SENSOR_WIND
if (check_measure_wind_done() == false)
{
//debug("wait for wind sensor finish");
fsm_state = FSM_STATE_9; // stay here until the wind measurement is done
} else {
//debug("wind sensor read finish");
fsm_state = FSM_STATE_10;
}
#else
// in case that the wind sensor is not used skip this step
sensor_cnt++;
fsm_state = FSM_STATE_5;
#endif
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_10:
#ifdef SENSOR_WIND
currentSensorData[sensor_cnt] = measure_wind_result();
debug("wind sensor " + String(currentSensorData[sensor_cnt]));
#endif
// step into read of next sensor read
sensor_cnt++;
fsm_state = FSM_STATE_5;
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_11:
#ifdef SENSOR_WIND
if (check_measure_wind_done() == false)
{
//debug("wait for wind sensor finish");
fsm_state = FSM_STATE_11; // stay here until the wind measurement is done
} else {
//debug("wind sensor read finish");
fsm_state = FSM_STATE_12;
}
#else
// in case that the wind sensor is not used skip this step
sensor_cnt++;
fsm_state = FSM_STATE_5;
#endif
break;
/* -------------------------------------------------------------------------------- */
case FSM_STATE_12:
#ifdef HTTP_CALL_ON_WINDSPEED_EXCEED
currentSensorData[sensor_cnt] = measure_wind_result();
debug("wind sensor value " + String(currentSensorData[sensor_cnt]));
if (currentSensorData[SENSOR_WINDSPEED] >= HTTP_CALL_ON_WINDSPEED_EXCEED_MPS)
{
// windspeed exceeded send http call
digitalWrite(STATUS_LED_PIN, HIGH);
// call the url HTTP_CALL_ON_WINDSPEED_URL
WiFiClient client;
HTTPClient http;
http.begin(client, String(HTTP_CALL_ON_WINDSPEED_URL).c_str());
// Send HTTP GET request
int httpResponseCode = http.GET();
if (httpResponseCode > 0)
{
String response = http.getString();
debug("http response code: " + String(httpResponseCode) + " = " + response);
// TODO handle response
}
http.end();
debug("Called windspeed exceed callout");
digitalWrite(STATUS_LED_PIN, LOW);
}
#ifdef WEBUPDATER_FEATURE
setSensorData(currentSensorData);
#endif
#endif
// step into read of next fsm state
fsm_state = FSM_STATE_2;
break;
/* -------------------------------------------------------------------------------- */
default:
fsm_state = FSM_STATE_1;
break;
} // close of switch
//debug("FSM state = " + String(fsm_state));
/*if (fsm_state == FSM_STATE_1)
{
debug("----------");
}*/
}
#endif
//*************************************************************************//
void _battery_mode_main()
{
if (energySavingMode() == 1)
{
// Disable expensive tasks
//debug("read of wind sensor because of low battery disabled");
do_not_read_windsensor = true;
} else {
//debug("read of wind sensor because of high battery enabled");
do_not_read_windsensor = false;
}
for (uint8_t i = 0; i < VALUES; i++)
{
currentSensorData[i] = readSensors(i);
}
#ifdef SERIAL_FEATURE
logToSerial(currentSensorData);
#endif
#ifdef INFLUXDB_FEATURE
pushToInfluxDB(DEVICE_NAME, currentSensorData);
#endif
#ifdef WEBUPDATER_FEATURE
setSensorData(currentSensorData);
#endif
}
//*************************************************************************//
#ifdef SERIAL_FEATURE
void logToSerial(float sensorValues[])
{
Serial.println("");
Serial.println("Current readings:");
Serial.println("Temperature: " + String(sensorValues[SENSOR_TEMPERATURE]) + " °C");
Serial.println("Humidity: " + String(sensorValues[SENSOR_HUMIDITY]) + " %");
Serial.println("Light: " + String(sensorValues[SENSOR_LIGHT]) + " Lux");
Serial.println("Windspeed: " + String(sensorValues[SENSOR_WINDSPEED]) + " km/h");
Serial.println("Pressure: " + String(sensorValues[SENSOR_PRESSURE]) + " hPa");
Serial.println("Bat Voltage: " + String(sensorValues[SENSOR_BAT_VOLTAGE]) + " V");
Serial.println("Bat charge state: " + String(sensorValues[SENSOR_BATCHARGESTATE]));
Serial.println("Energy saving: " + String(sensorValues[SENSOR_ESAVEMODE]));
}
#endif
//*************************************************************************//
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