@taylo708
I was assuming you were not getting the humidity readings from the sensor.
If you have the sensor set up to display the humidity then you can use daemon.g to control the heater.
I'd imaging you'd need to set up several global variables in config.g including one to ensure you can turn the heater on/off
Then in daemon.g use something like this (change the sensor value)
if global.ChamberHeaterOn = false M140 S-273.1 ; switch off heater elif sensors.analog[2].lastReading <= global lowHumidity M140 S40 elif sensors.analog[2].lastReading <= global midHumidity M140 S60 elif sensors.analog[2].lastReading <= global highHumidity M140 S80 else ; whatever you want to do if over the high valueAnd set up a couple of buttons to set the global to true or false to offer manual control when needed