So I fiddled around with the stm330 firmware and got some results. Now I'm trying to restore it to its original state by downloading firmware from the enocean website and programming it to the unit. Now the problems is that I am getting temperature telegrams from the stm330 but the temperature is all wrong. When the blow warm air at it, the temperature reading drops instead or rising.
I checked the application note on calibrating the device but there is no info on inverted readings.
Any clue anyone?