edoduka904 years ago000Can I only work with the wall thermostat and the radiator thermostats? So by radio with mobile phone/app or do I need such a central unit for this? Show in original language (German)stetter014 years ago000A central unit such as the CCU 3, HMID HAP or Homematic IP Central WLAN access point is required.Show in original language (German)Commenthc.stiebellehner4 years ago000A central office is neededShow in original language (German)Comment