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EnvironmentSensorManager.cpp: Mitigate BME280 self-heating causing inaccurate readings.

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entr0p1
2025-12-20 21:51:51 +11:00
parent 6c993827de
commit cc28b1a34d
1 changed files with 13 additions and 4 deletions
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17
src/helpers/sensors/EnvironmentSensorManager.cpp
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@@ -192,6 +192,13 @@ bool EnvironmentSensorManager::begin() {
if (BME280.begin(TELEM_BME280_ADDRESS, TELEM_WIRE)) {
MESH_DEBUG_PRINTLN("Found BME280 at address: %02X", TELEM_BME280_ADDRESS);
MESH_DEBUG_PRINTLN("BME sensor ID: %02X", BME280.sensorID());
// Reduce self-heating: single-shot conversions, light oversampling, long standby.
BME280.setSampling(Adafruit_BME280::MODE_FORCED,
Adafruit_BME280::SAMPLING_X1, // temperature
Adafruit_BME280::SAMPLING_X1, // pressure
Adafruit_BME280::SAMPLING_X1, // humidity
Adafruit_BME280::FILTER_OFF,
Adafruit_BME280::STANDBY_MS_1000);
BME280_initialized = true;
} else {
BME280_initialized = false;
@@ -359,10 +366,12 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
#if ENV_INCLUDE_BME280
if (BME280_initialized) {
telemetry.addTemperature(TELEM_CHANNEL_SELF, BME280.readTemperature());
telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME280.readHumidity());
telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME280.readPressure()/100);
telemetry.addAltitude(TELEM_CHANNEL_SELF, BME280.readAltitude(TELEM_BME280_SEALEVELPRESSURE_HPA));
if (BME280.takeForcedMeasurement()) { // trigger a fresh reading in forced mode
telemetry.addTemperature(TELEM_CHANNEL_SELF, BME280.readTemperature());
telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME280.readHumidity());
telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME280.readPressure()/100);
telemetry.addAltitude(TELEM_CHANNEL_SELF, BME280.readAltitude(TELEM_BME280_SEALEVELPRESSURE_HPA));
}
}
#endif