Fast, forced calibration over mqtt

ampel-firmware/mqtt.cpp

@@ -96,7 +96,9 @@ namespace mqtt {
       config::co2_calibration_level = messageString.toInt();
       Serial.print(config::co2_calibration_level);
       Serial.println(" ppm.");
-      sensor::startCalibrationProcess();
+      sensor::scd30.setForcedRecalibrationFactor(config::co2_calibration_level);
+      Serial.println(F(" Done!"));
+      Serial.println(F("Sensor 'calibrated' :D."));
     }
   }