You can have a look to a drayton rf programmable room thermostat who run on 433mhz and with RFLink. Digistat rf series do the job on 433 mhz. http://www.draytoncontrols.co.uk/products/programmable-thermostats/digistats-programmable/digistat3-rf?redirected-from=Digistat3RFProgrammableRoomThermostat ...

It sounds like you are having the same issue I had with my Brennenstuhl sockets. I solved this by following this link: https://www.domoticz.com/forum/viewtopic.php?t=1194#p7075 I had to use the chart to work out the House and Unit codes from the dip switches. Other units have sliders/turn switches ...