Modifying CUL firmware to increase send limit for eq3 MAX! heating thermostats

MAX-HeizkoerperthermostatPlus-640040d2Updated November 2016 to completely remove credits handling so there is no restriction on transmission

I’ve recently purchased 10 of the eq3 MAX!┬ácentral heating thermostats (TRV replacements) as well as 3 shutter contacts and 2 eco switches from conrad electronics. I also bought the MAX! cube but then decided to use a CUL device from busware.de to control them using FHEM because this allows for easier interaction with them and use of the eco switches directly. Continue reading “Modifying CUL firmware to increase send limit for eq3 MAX! heating thermostats”