power down sensors

src/main.cpp

@@ -119,7 +119,26 @@ time_t getTimestamp() {
 void poweroffDevices() {
   display.powerOff();
 
-  // ToDo: Sensors
+  if (sensors_active.bme680) {
+    bme680.setGasHeater(0, 0);
+  }
+  if (sensors_active.bme280) {
+    bme280.setSampling(Adafruit_BME280::MODE_SLEEP,
+                       Adafruit_BME280::SAMPLING_X1, // temperature
+                       Adafruit_BME280::SAMPLING_X1, // pressure
+                       Adafruit_BME280::SAMPLING_X1, // humidity
+                       Adafruit_BME280::FILTER_OFF   );
+  }
+  if (sensors_active.light) {
+    static constexpr byte BH1750_I2CADDR = 0x23;
+    Wire.beginTransmission(BH1750_I2CADDR);
+    Wire.write(BH1750_POWER_DOWN);
+    byte ack = Wire.endTransmission();
+  }
+  if (sensors_active.uv) {
+    uv.shutdown(true);
+
+  }
 }
 
 
@@ -718,6 +737,7 @@ void setup()
 
   if (lightMeter.begin()) {
     sensors_active.light = true;
+    lightMeter.setMTreg((byte) BH1750_DEFAULT_MTREG);
   } else {
     ESP_LOGW(TAG, "Failed to communicate with BH1750 sensor, check wiring?");
   }