I also want to use math operators in blockly. I want to calculate a DeltaHumidity: the difference between the outside humidity (from a weather station nearby) and the humidity in my bathroom. This to switch my ventilation. ANy clue how to do that in Blockly? I have no solution for you, but just ...

I also want to use math operators in blockly. I want to calculate a DeltaHumidity: the difference between the outside humidity (from a weather station nearby) and the humidity in my bathroom. This to switch my ventilation. ANy clue how to do that in Blockly?