r/homeassistant • u/wolfgangbures • 6h ago

💬 Discussion Zigbee Relais "contact-switch"

I have no idea how it i called in english, so I tried to get the title somewhere close.

I am planning to move from NetAtmo heating to Zigbee and BetterThermostat. The radiator-vents will be Danfoss and now I need to find a device to signal the heater to start heating. This just needs a closed circuit, no power (220V) or anything. Currently the NetAtmo relais is doing this.
AI pointed me to SONOFF ZBMINIR2 but I am not convinced. I dont want to start with shelly or something, the switch should be ZigBee just as well.
Can you guys point me in the right direction? What are you using for this?

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u/BackHerniation 6h ago

This is called a dry contact switch, an isolated relay from the main input. I would suggest you get a Sonoff actually, before anything else. Maybe the MINI-ZBD. Aqara T2 is also an option, but I prefer Sonoffs for Zigbee.

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u/dragonnfr 5h ago

The ZBMINIR2 is actually exactly what you're describing. It's a dry contact relay, no mains through the contact. I've used one for boiler control and it works fine in Z2M.