edoduka905 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)stetter015 years ago • purchased this product000purchased this productA central unit such as the CCU 3, HMID HAP or Homematic IP Central WLAN access point is required.Show in original language (German)Commenthc.stiebellehner5 years ago • purchased this product000purchased this productA central office is neededShow in original language (German)Comment