diff --git a/src/main.cpp b/src/main.cpp
index 4eea5be..6572a2c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -22,6 +22,7 @@
 #include <Adafruit_Sensor.h>
 #include "Adafruit_BME280.h"
 #include "Adafruit_BME680.h"
+#include "bme680.h"
 
 #include "Adafruit_VEML6075.h"
 #include <BH1750.h>
@@ -184,6 +185,67 @@ void getSensorMeasurements() {
 }
 
 
+void setSensorsPowerOn() {
+  if (bme680_active) {
+    /*
+    gas_sensor.power_mode = BME680_FORCED_MODE;
+    bme680_set_sensor_mode(&gas_sensor);
+    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
+    bme680.beginReading();
+  }
+  if (bme280_active) {
+    bme280.setSampling(Adafruit_BME280::MODE_NORMAL,
+                       Adafruit_BME280::SAMPLING_X8, // temperature
+                       Adafruit_BME280::SAMPLING_X4, // pressure
+                       Adafruit_BME280::SAMPLING_X2, // humidity
+                       Adafruit_BME280::FILTER_X4,
+                       Adafruit_BME280::STANDBY_MS_0_5  );
+  }
+  if (light_active) {
+    static constexpr byte BH1750_I2CADDR = 0x23;
+    Wire.beginTransmission(BH1750_I2CADDR);
+    Wire.write(BH1750_POWER_ON);
+    byte ack = Wire.endTransmission();
+
+  }
+  if (uv_active) {
+    uv.shutdown(false);
+  }
+}
+
+
+void setSensorsPowerSave() {
+  if (bme680_active) {
+    bme680.setGasHeater(0, 0); // 320*C for 150 ms
+    /*
+    gas_sensor.power_mode = BME680_SLEEP_MODE;
+    bme680_set_sensor_mode(&gas_sensor);
+    */
+  }
+  if (bme280_active) {
+    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 (light_active) {
+    static constexpr byte BH1750_I2CADDR = 0x23;
+    Wire.beginTransmission(BH1750_I2CADDR);
+    Wire.write(BH1750_POWER_DOWN);
+    byte ack = Wire.endTransmission();
+  }
+  if (uv_active) {
+    uv.shutdown(true);
+  }
+}
+
+
 void receiveMqtt(const char* topic, const char* data) {
     sensor_readings_t* sensor = NULL;
 
@@ -570,6 +632,7 @@ void setup()
 
   if (lightMeter.begin()) {
     light_active = true;
+    lightMeter.setMTreg((byte) BH1750_DEFAULT_MTREG);
   } else {
     Serial.println("Failed to communicate with BH1750 sensor, check wiring?");
   }