MHCOZY 1 Channel 5V 12V ZigBee Smart Relay Switch,Adjustable Selflock and Momentary Working Mode,DIY Smart Home (ZigBee Hub Required)

This is a fabulous little ZigBee board. It's basically a changeover relay with brains. Works perfectly with my Homeassistant/ZHA/Sonoff-tasmota gateway setup.Though it does report to HA as a light, this can be changed by setting up a template switch as a wrapper around it. I did this as my board is controlling a dehumidifier - not a light.What you see is what you get. The board and a tiny little instruction sheet. Only interested in the wiring diagrams and microswitch functions, as I'm not doing anything with Alexa etc. All labelled correctly.Board accepts power through either a micro-usb or standard terminals. Power is not passed through to the relay circuit. It is an isolated dry contact. The antenna wire is good and can be uncoiled to a fair length.Powering up immediately puts the device in pairing mode. Discovery by the gateway was fast and painless.The default relay setting is what they call 'inching'. Found out that this is just momentary. When triggered, the relay side will flip for a second and then flip back. Good if you want control over things that rely on a momentary input.A microswitch on the board will change the mode to behave like a standard on/off relay, holding the position commanded until told otherwise. This is the mode I am using.Because this relay uses next to no power - if you have a device with a power adapter rated within the bounds of the board tolerance as I did (9V, DC), it is possible to splice this board between the device being controlled and the device power supply.Power the board using the dedicated power terminals with the device supply, but also run the device circuit through the relay. You'll need some tools, extra wires, a suitable junction box and some basic electrical knowledge to do this correctly.This gives a board that is always powered - also powering the device with its own adapter when the relay flips.We will see how it fares long term! If all good then I'll be grabbing a few more for other little projects.

This works a reliably with my Home Assistant/Zigbee setup. As with most ZIgbee devices I did need to adjust its position to get a reliable signal. It is now being used to switch the central heating boiler on an off in conjunction with house thermostats. I'm powering it by USB as this was the easiest for the location of the boiler.

The media could not be loaded. Just what I was looking for: a straightforward Zigbee relay.I positioned it next to my HUE bridge and plugged it into a 5v USB supply via the micro-USB connector on the side. Then I scanned for new lamps on the HUE app and quite quickly the relay popped up as "ONOFF Light" at which point I could control it no problem. My HUE bridge is also connected to HomeKit, so the relay shows up under the Apple Home app and can be controlled that way too.One press on the 'mode' button on the device puts it into momentary mode which makes it output a ~1sec pulse each time you command it ON from the app, which is useful to trigger a garage door opener for example.

Ok, it's a quite big when compared to the usual Zigbee/Zwave devices but hey, it's cheap and works. I use a Hubitat system and it had the correct drivers already installed ready to use, such an easy setup, I am impressed. I used it to turn my halloween monsters on and off to scare people.

Working good with Hubitat C5. Easy to install. No troubles with state reporting. Fast reaction on commands.

Found easy using home assistant and a zigbee dongle. East to set up even for a novice.

Finally - a 12v zigbee relay! Paired with Home Assistant with no problem. Will be buying more.

This (with a gateway purchased separately) is an ideal way to make a house alarm settable by google home or Alexa. Most of the old-style hard-wired house alarms have the ability to turn zones into a key switch. This can be used as a voice-activated key switch. It is multi-voltage too so can be powered off the standard 12v given from the alarm. Cheap way to add automation to an ageing alarm system. It is just a bare circuit board but I found it fits nicely into an electrical chocbox, the aerial can be uncoiled out the side of the chocbox and the wires out the other side. A great buy. I am trying to think of other uses.....