Automation for a 62m2 flat - wired or wireless, which systems to choose?

For a low-cost hobby installation, use a conventional centrally wired electrical system with bistable relays and add an Ethernet-connected PLC or controller rather than relying entirely on an expensive proprietary bus. Route each lamp, socket or blind motor and its momentary wall switch back to the distribution board; the relays preserve normal manual operation even if the automation controller fails. Use relays with an auxiliary state contact so the controller can determine whether a circuit is on, and drive mains relay inputs from an Arduino through an isolated 5 V interface relay rather than connecting the Arduino directly. A Fatek PLC was suggested as a more capable alternative to Sterbox or IUVO, while Satel was described as economical and scalable; Sterbox can provide custom web pages for tablet control, including weather or timetable information. [#13721918] [#13721776] [#13761659] [#13954954] [#14020113] Plan cabling carefully by cable category, distance, bend radius, interference and routing, and photograph all routes before closing the walls because ordinary electrical installation practices may damage or impair data, TV/SAT and control cables. [#13722602] [#13724263] TV control can be handled with RC5/IR receivers in rooms and a transmitter, with the automation system communicating through a PLC interface such as Modbus. [#13721918]