Aqara Dimmer Switch H2 EU

[hvdheurik (Harm Van Den Heurik)]

Last week I bought the Aqara Dimmer Switch H2 EU. The device works fine to control non smart lights as it just works as a normal dimmer. It’s visible in HA as a light so you can easily control it that way. But what i would like to do is to use the dial on the switch to dim zigbee lights. I think that should be possible with an automation but I can’t seem to find how to achieve this. When you rotate the dial it changes the brightness of light entity in HA. So i would like link the brightness of the switch to other lights.

[hvdheurik (Harm Van Den Heurik)]

I found a blueprint that did the job!

Linked Entities - keep mutlple entities state in sync (lights, switches, etc.)

[Open your Home Assistant instance and show the blueprint import dialog with a specific blueprint pre-filled.] Linked Entities v1.3 (changelog below) This blueprint allows you to easily create/maintain an automation that links the state of multiple entities: turn ANY linked entity ON, it will turn ON ALL linked entities. turn ANY linked entity OFF, it will turn OFF ALL linked entities. set the brightness of any light entity, it will set the same brightness of ALL linked light entities. s…

[it01daniels]

I’m curios about you’re set up, did you connect the dimmer directly to HA or did you use a hub?

I bought the same one, and tried to connect it to HA using the ZBT-1 usb stick over thread, but communication seems to fail.

[hvdheurik (Harm Van Den Heurik)]

I use the Sonoff | Zigbee 3.0 | Dongle Plus-E which is connected on a USB port of my QNAP nas. On the nas I run a Zigbee2mqtt docker which is being used by Home Assistant. So long story short, I’m not using a hub. But before you can use the switch as a zigbee device you must first put in in zigbee mode. I did that with the Aqara app. There you can switch protocols from matter to zigbee.

And at the moment I have the switch in decoupled mode with an automation in HA and that works great.

[it01daniels]

That really helped me! I thought it needed to connect through thread before it could be configured further.
Thanks for helping me out!

[Todilo]

Can you control the intensity of the light that the dimmer controls through HA? I can only find a entity “switch” which turns it on/off but not change intensity.

[hvdheurik (Harm Van Den Heurik)]

If the device is in ‘decoupled’ mode you should see ‘action rotation’ sensors. And these sensors are used in an automation for the dimming.

[MzLiv (Liv)]

What automation are you using? The blueprint appears to need brightness which is not available for me as the brightness of the physical dimmer needs to be set to full to provide power to the smart light. I have the dimmer in decoupled mode.

[hvdheurik (Harm Van Den Heurik)]

What I forgot to mention is that I only connected the dimmer to power. I bypass the actual relay because that doesn’t work because I use Zigbee lights and they need direct power instead of ‘switched’ power.

[hraschan (Maximilian Hraschan)]

So for my own clarification as english is not my first language. You are connecting the switch via zigbee to home assistant. Then put the switch in decoupling mode (How did you achieve that?). Then in HA you have a entity for the dimmer? Which controls your smart bulbs with an automation?

Am I right with that?

[benJo1985 (Ben)]

For me it’s working like that. You don’t need to link every action.

And somehow the Aqara has to be in relay_mode what confuses me. I was testing with decoupled first and got frustrated because it wouldn’t work.

[nurunet]

For anyone who wants to dimm in detached mode, this is my (far from perfect) solution: Aqara knob / Dimmer Switch H2 EU detached mode brightness control