firmware/src/modules/Telemetry/Sensor/BME680Sensor.cpp

#include "../mesh/generated/telemetry.pb.h"
#include "configuration.h"
#include "TelemetrySensor.h"
#include "BME680Sensor.h"
#include <Adafruit_BME680.h>

BME680Sensor::BME680Sensor() : TelemetrySensor {} 
{
}

int32_t BME680Sensor::runOnce() {
    unsigned bme680Status;
    DEBUG_MSG("Init sensor: TelemetrySensorType_BME680\n");
    if (!hasSensor(TelemetrySensorType_BME680)) {
        return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
    }
    bme680Status = bme680.begin(nodeTelemetrySensorsMap[TelemetrySensorType_BME680]); 
    if (!bme680Status) {
        DEBUG_MSG("Could not connect to any detected BME-680 sensor.\nRemoving from nodeTelemetrySensorsMap.\n");
        nodeTelemetrySensorsMap[TelemetrySensorType_BME680] = 0;
    } else {
        DEBUG_MSG("Opened BME680 on default i2c bus\n");
        // Set up oversampling and filter initialization
        bme680.setTemperatureOversampling(BME680_OS_8X);
        bme680.setHumidityOversampling(BME680_OS_2X);
        bme680.setPressureOversampling(BME680_OS_4X);
        bme680.setIIRFilterSize(BME680_FILTER_SIZE_3);
        bme680.setGasHeater(320, 150); // 320*C for 150 ms
    }
    return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
}

bool BME680Sensor::getMeasurement(Telemetry *measurement) {
    DEBUG_MSG("BME680Sensor::getMeasurement\n");
    measurement->variant.environment_metrics.temperature = bme680.readTemperature();
    measurement->variant.environment_metrics.relative_humidity = bme680.readHumidity();
    measurement->variant.environment_metrics.barometric_pressure = bme680.readPressure() / 100.0F;
    measurement->variant.environment_metrics.gas_resistance = bme680.readGas() / 1000.0;

    return true;
}