Aqara T2 Relay Automation Not Triggering Second Relay (Staircase Setup)

Aqara Products
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Problem with Aqara T2 (DCM-K01) Relay Automation – Staircase System

Hello,

I would like to ask for support regarding the automation issue I’m experiencing with two Aqara T2 relays (DCM-K01 with neutral), designed to control a light in a staircase system.

Installation and Settings:

  • Both relays are Aqara T2 (firmware 0.0.0_0032)
  • Aqara M3 Hub (version 4.3.7_0036)
  • Relay settings in Aqara Home:
    • Switch Type: “Button”
    • Device Mode: “Wet contact”
  • One relay (upper button) is only powered and connected to the button at the top of the stairs, the other (main relay) is located near the light at the bottom.
  • Manual switching of the light works correctly via both buttons.

Automation:

  • IF: Short press of Button 1 (S1) – the upper button at the stairs
  • THEN: Turn ON/OFF Channel 1 – the main relay at the bottom near the light

Problem:

  • When I press the upper button, I hear the relay inside click, but the main relay at the bottom does not react (the light does not turn on).
  • Testing the automation in the Aqara Home app works perfectly – Channel 1 of the main relay switches and the light turns on/off.
  • The issue only occurs when triggering the automation by physically pressing the upper button.

Summary:

  • All modules have the latest firmware.
  • Manual control and test automation via the app work as expected.
  • Automation triggered by actual button press does not switch the light at the main/bottom relay.

Request:

Please advise what could be causing this issue or suggest further troubleshooting steps (e.g., different settings, additional updates, diagnostics, etc.).

Thank you! Robert from Czech R.

2

Is the voltage 220 volts?

3

yes, 230v

4

For a better understanding, you can upload screenshots of automations.

5

Just to add, when I create the same automation on an Apple iPhone, it works. But I need in Aqara Home

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7

Got it.
Now check the type of automation execution (cloud or local).
I have had cases of cloud automations not executing. Do you know where to check this?

8

You can also try to make two automations on On/Off.
IF T2 is pressed and T1 is off (°°) THEN Turn on T1.
IF T2 is pressed and T1 is on (°°) THEN Turn off T1.

9

Hi, I tried this automation and it’s the same, I think the problem is that I changed the switch type (Rocker) and physically replaced it with a Momentary Button.

10

Did you check the type of automation (cloud, local)?

11

@rkoperdak
I’ll be home on the weekend, test your automation, and post the results.