Future U200 / G410 version with built-in relay output for electric strike?

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Hello everyone,

I would like to ask whether Aqara has announced, or is considering, a future version of either the Smart Lock U200 or the Doorbell Camera Hub G410 with an integrated relay / dry contact output.

My use case is very common in European apartments: I want to control an electric strike / door release together with the smart lock and video doorbell.

Today, as far as I understand:

U200 can unlock the door and retract the latch, but it has no relay output.
G410 can work as a video doorbell / intercom, but it also has no relay output.
To control an electric strike, an additional relay such as the Aqara T2 is needed.

The limitation is that the setup becomes more complicated, especially when trying to open the door from a keypad or from an Aqara panel/intercom screen.

So my questions are:

  1. Has Aqara announced any future U200 or G410 version with built-in relay / dry contact output?
  2. Is there any plan to allow the G410, U200 keypad, or S1 Plus panel to directly trigger an electric strike / door release?
  3. Is there any recommended official Aqara setup for this use case:
    video doorbell + smart lock + electric strike?

This would be very useful for European homes where electric strikes are commonly used.

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I think the idea is interesting, but I believe most European apartments are rented, with an existing intercom system that tenants are neither allowed to replace nor able to control with a simple relay. In my case, I use a Ring Intercom for this purpose in my rental apartment.

If Aqara offered a similar solution, that would be great — but it would probably make more sense as a dedicated standalone device rather than integrating it into the smart lock. After all, how would you even run the wiring for that? The electric strike at the front door and the smart lock on the apartment door are typically two completely separate doors. And even if it were the same door, wiring them together would be a challenge — the electric strike is mounted in the door frame, while the smart lock sits in the door itself, and you can’t easily run cables across that gap.

Perhaps the idea was to integrate a relay into the U200 keypad, which can be freely positioned — including next to the door frame where the electric strike is located. However, the keypad runs on batteries, and switching an electric strike repeatedly would drain them very quickly, as batteries in such devices are simply not designed for that kind of load. This means you would inevitably need to hardwire it to a permanent power supply.

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Hi @nikosifan ! I also like the idea ! Maybe it’s possible to implement such a feature or a better way to integrate side devices to a doorbell/ doorlock system!
I think @Aqara_PM_Donie will consider about that in future products
:x2fozabcpx9xrbxmdpseb3_61:

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This is a very interesting topic. Regarding the usage scenario you guys described, I think the most reasonable design should be to integrate the dry contact into the video doorbell, rather than the door lock.

About three or four years ago, when we launched the first generation of video doorbell G4, we saw that Netatmo’s doorbell supported the dry contact function. This function was designed to be compatible with the original mechanical electric bell ringing, but I think it is also feasible to control the electric doors. This is a very practical function. We did not integrate it into the doorbell because we were concerned about patent infringement issues, and our T2 relay moduel is also small enough in size, so there is no need to integrate it.

Next, I need to rule out the possible patent issues mentioned above, as well as the impact of additional power consumption caused by the operation of the driving relay and the increase in doorbell size. I believe that with Aqara’s current technological reserves, there are no obstacles to achieving this function. I will carefully evaluate the feasibility of integrating this function into the doorbell.

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Thanks for the detailed answer @Aqara_PM_Donie ! But would it be easier to but some extra button on app application of the the doorbell with the opportunity to add a T2 relay?

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yes, my friend, due to certain special reasons, my engineers has been working on other important projects, and I believe I will eventually get this feature being supported on the doorbell app interface.

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Thank you all for the replies and especially @Aqara_PM_Donie for the detailed explanation.

After testing and thinking more about the use case, I would like to clarify the exact scenario and the features that would make the Aqara ecosystem much more complete for European apartment doors.

My setup / desired setup is:

G410 as video doorbell / camera
S1 Plus or future S2 panel as indoor intercom screen
U200 as smart lock
T2 as electric strike / door release relay
M3 as main Aqara hub / automation hub

The goal is to make these devices work together as one complete door-access system.

  1. Door release button on the Aqara panel / intercom screen

When someone rings the G410, I would like to see the visitor on an Aqara panel, such as S1 Plus / future S2, and have a clear Door Release / Electric Strike button on the same screen.

This button should be able to trigger an Aqara T2 relay or another Aqara relay device configured as a momentary dry contact.

For example:

G410 call → video appears on Aqara panel → user taps “Open Door” → T2 relay pulse → electric strike opens

Today, the T2 can already control an electric strike, but it is not presented naturally as a door-release button in the G410 / intercom / panel interface.

A very useful software improvement would be:

Allow the G410 / Aqara panel intercom screen to show a configurable “Open Door” button linked to a T2 relay or another Aqara relay.

This alone would solve a major part of the use case without requiring new hardware.

  1. U200 keypad should be usable as an access-control trigger

Another important improvement would be to make the U200 keypad more flexible.

The keypad is currently mainly bound to the U200 lock. However, for electric strike use cases, it would be extremely useful if the keypad authentication itself could be exposed clearly as an automation trigger.

For example:

IF U200 keypad valid PIN / fingerprint / NFC accepted → THEN T2 relay pulse → electric strike opens

This should work independently of whether the U200 lock status changes or not.

The important event is not only:

Lock becomes unlocked

but rather:

A valid credential was accepted on the keypad

Even if the lock is already unlocked, the user is still clearly requesting access from outside by entering a valid PIN, fingerprint, NFC, etc.

So a trigger such as:

U200 keypad: valid credential accepted

would be more useful and more reliable than relying only on locked/unlocked state changes.

  1. Keypad binding to T2 or Aqara scenes

Maybe the U200 keypad does not need to be limited only to controlling the U200 lock.

If the keypad could be bound not only to the U200 lock, but also to an Aqara relay or scene, this would solve many electric strike scenarios.

For example:

Valid PIN / fingerprint / NFC on U200 keypad → trigger Aqara T2 relay pulse → electric strike opens

The user could then choose what the keypad controls:

unlock U200 only
trigger T2 relay only
unlock U200 + trigger T2 relay
trigger a custom Aqara scene

This would make the U200 keypad work not only as a lock accessory, but also as a general Aqara access-control trigger.

From a product perspective, this may be more realistic than adding a physical relay to the U200 itself, because it could potentially be achieved through software / firmware / Aqara Home automation improvements.

  1. Future hardware: doorbell, panel, or access module with built-in dry contact relays

I also agree that if Aqara ever adds a built-in dry contact relay, it may make more sense to integrate it into the video doorbell, indoor panel, or a dedicated door-access module, rather than into the smart lock itself.

For European apartments, a future Aqara doorbell, panel, or access module with one or two built-in dry contact relays would be very useful.

For example:

Relay 1: apartment door electric strike
Relay 2: building entrance / common entrance door release

This would allow the Aqara panel to work much more like a real video intercom system:

Visitor rings → video appears on panel → button 1 opens apartment door → button 2 opens building entrance

Of course, if adding relays to the doorbell hardware creates size, power, wiring, or patent issues, then a software solution using the existing T2 relay would already be very helpful.

  1. Suggested official Aqara setup

A practical official Aqara setup for European homes could be:

G410 as video doorbell / camera
S1 Plus or future S2 panel as indoor intercom screen
U200 as smart lock
T2 as electric strike / door release relay
M3 as main hub / automation hub

But for this setup to feel complete, Aqara should ideally support:

  1. T2 relay as a native “door release” device in the G410 / panel interface.
  2. U200 keypad valid credential accepted as an automation trigger, independent of lock status.
  3. The ability to bind the U200 keypad to a T2 relay or Aqara scene, not only to the U200 lock.
  4. Optionally, future Aqara doorbells, panels, or access modules with one or two integrated dry contact relays.

This would make the Aqara ecosystem much more suitable for European apartment doors, where a smart lock, video doorbell, indoor monitor, and electric strike often need to work together as one complete access-control system.

Thank you again for considering this use case.

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Definitely would be great if you could set a button on the interface which you can link to the automation you need

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We are facing the same issue. I would love to see a solution for this scenario, especially one that allows a keypad to directly trigger the electric strike and also enables the electric strike to be activated from the video screen of a G410.

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Que buenas noticias!! Tengo el G410 y T2 por instalar y el motivo es ese… que desde la llamada recibida en el móvil no se puede abrir la cerradura electrónica con un simple botón…