Raspberry pi Heating Boiler Control System Relay: Control gas boiler from raspberry pi gpio with relay by connecting it to room thermostat connection on gas boiler without passing any voltage to gas boiler or at least this is how i did it as my gas boiler had thermostat connector available, you need to check this with your boiler user/technical manual. You can control high voltage electronic devices using relays modules that are readily available in the market. I am using…