How to wire 2 way with Aqara D1 Smart Light Switch?

Hardware
, ,
1

Hi guys,

I am looking to add home assistant and some automation to my wife’s parents home.

Nearly every light switch is a 2 or 3 gang with a lot of 2-way wiring for various lights.

I am thinking of replacing their light switches with Aqara D1 smart switches but I’m not sure how exactly to wire the two way scenario of the existing switches.

For instance, in their living room, they have a 2-gang switch that controls a light in the living room and the dining room. The dining room has a 3 gang switch that controls the dining room light, an outdoor light and a kitchen light.

If I was to replace both switches, how would I wire this or is it even possible to replicate?

I was looking at Sonoff relays and other brands but the back box on the light switches are quite shallow so the bigger ones won’t fit.

Any advice greatly appreciated, before everything arrives and I attempt to start.

Thanks,
Mac

2

Initially my first thought was, hire an electrician !, but my first “action” would be create a wire-diagram of current installation. Before ! you do anything else
Any help from here would just be based upon assumptions other-vice, in best case !

1 Like
3

Hi there,

Thanks for the reply.

This is not a specific scenario question, it’s in general, how do you wire 2-way on these smart Zigbee light switches?

Perhaps I just need to wire them like a single switch and then create an automation to change the state of the other switch depending on what happens to the switch that’s changing….

Cheers,
Mac

1 Like
4

Right, i believe i saw some suggestions and solutions in regards to that, In here somewhere

1 Like
5

Not possible since it’s not really designed for 2 way switches.
You could just wire it like this and use zigbee binding (assuming it’s supported) or use scene/automation to trigger the other switch

image
image789×387 75.3 KB

1 Like
6

Thanks for the detailed reply.

It’s a pity it’s not an option, it’s a bit of a design oversight saying as it’s such a common wiring feature in homes.

I will need to assess the wiring and then come up with a plan, I suspect some scenes/automations will be required .

Cheers,
Mac

7

Actually, it is possible, and I have successfully done this with two D1 (no neutral) switches. The fully virtual solution mentioned above relies on HA acting as a virtual switch, which introduces a delay when turning the light on or off—not ideal.

I wired it so that both switches can physically turn on the same light immediately (without relying on HA). However, an automation is still required to sync the state between the two switches, meaning turning off is slightly delayed on one of them (since it’s virtually triggered).

Advantages:

  • Immediate turn-on (as both switches are physically wired)

  • Still works even if HA is offline (at least for turning on the light from either switch)

This setup has been running flawlessly for 4+ years. :blush:

The thread is a bit outdated, but if you’re still interested, I can draw up and share the wiring diagram here.

8

Hello.
I would be very interested in your solution!
Thank you in advance :+1:

9

Could you post the wiring diagram here? I am also interested in your solution.
Thank you!:pray:t3:

10

Hi both, will do so shortly.

1 Like
11

Would you be able to share the wiring diagram with us?
Appreciate the help in advance!