weatherstation/firmware/sensors.ino

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#include "config_user.h"
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int anemometerRotations = 0;
unsigned long currentTime = 0;
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float fetchTemperature() {
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//return 10;
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return bme.readTemperature();
}
float fetchPressure() {
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//return 10;
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return bme.readPressure() / 100.0F;
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}
float fetchHumidity() {
return bme.readHumidity() * HUMIDITY_FACTOR;
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}
float fetchLight() {
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//TODO read values
uint16_t red, green, blue, white, lux;
while(!apds.colorDataReady()) {
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delay(5);
}
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apds.getColorData(&red, &green, &blue, &white);
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//calculate lux
lux = apds.calculateLux(red, green, blue);
return lux * LIGHT_FACTOR;
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}
void _anemometerInterrupt() {
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anemometerRotations++;
#ifdef DEBUG
Serial.print("*");
#endif
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}
float fetchWindspeed() {
anemometerRotations = 0;
currentTime = millis();
int interruptNumber = digitalPinToInterrupt(ANEMOMETER_PIN);
attachInterrupt(interruptNumber, _anemometerInterrupt, RISING);
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delay(1000 * 5);
detachInterrupt(interruptNumber);
return (float)anemometerRotations / 5.0 * 2.4;
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}
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// Copied from https://arduinodiy.wordpress.com/2016/12/25/monitoring-lipo-battery-voltage-with-wemos-d1-minibattery-shield-and-thingspeak/
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#ifdef BATTERY_POWERED
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float getBatteryVoltage() {
// ESP8266 ADC pin input voltage range ist 0V .. 1V
// The Wemos D1 mini does already contain a voltage divider circuit: A0(Wemos PCB) -- [220kOhm] -- ADC (ESP8266)-- [100kOhm] -- GND
// The (+) pole of the battery is connected to the A0 pin of the Wemos board through a additional 100kOhm resistance.
// The battery voltage of 4.2V max is measured as 1.0V on ESP8266 ADC pin.
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uint16_t raw = analogRead(A0);
float volt = raw / 1023.0;
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return volt * 4.2;
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}
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float isBatCharging() {
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if (LOW == digitalRead(BAT_CHARGING_PIN))
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{
return BAT_CHARGE_STATE_CHARGING;
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} else if (LOW == digitalRead(BAT_CHARGED_PIN))
{
return BAT_CHARGE_STATE_CHARGED;
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}
return BAT_CHARGE_STATE_NOTCHARGING;
}
#endif
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