I wish to close and open voltage free contacts remotely from a Thermostat downstairs to the boiler upstairs.
The thermostat has voltage free contacts which close and open according to temperature and I want to relay that via rf, infra red or bluetooth from small battery operated transmitter and reciever.
Has anyone any "off-the-shelf" or "done that before" or other suggestions, please
The thermostat has voltage free contacts which close and open according to temperature and I want to relay that via rf, infra red or bluetooth from small battery operated transmitter and reciever.
Has anyone any "off-the-shelf" or "done that before" or other suggestions, please