I managed to build a system using Wemos D1 R1 connected to my website to retrieve data to power on or off a 5V relay. Now I would like to expand the project to control all my house outlet. Assuming I have, 5 rooms each of which has 5 electricity wires to control. My question is what is the best setup to achieve my goal in terms of efficiency and cost optimization. If I clone my current setup, I would be needing Wemos Module for every room that connecting separately to my Wifi and then to my server which seems too much for me. So what would you recommend?
- Can I use one single central Wemos and then communicate to each room through ESP2866 or 433MHZ RF modules.
- I would be using at least 4 channel 5V relay Module. Could it be powered using 5V in Wemos or Arduino or should be powered with adapter
- If I want to control a fridge or AC or water heater, should I need SS Relay or any relay would suffice
- if SS Relay to be used, I have read that heat sink or fan should be included, is that a must?