It needs to hack the original door remote or wall controller to make the meross opener work with your system.

1. Find your door remote or wall controller. Try the button that can open and close the door.
*If your wall controller looks exactly the same as the middle one below, it is not compatible.


2. Open the remote or wall controller and find the click button.

3. Try to find the soldering points of the button.



4. Use a test wire to try any two of them to see if the door can be opened and closed alternatively.
*For wall controller, it must be wired before doing this test.



5. Find a two-core wire and solder it to the board. 



6. Left one end of the wire outside the remote/wall controller.



7. Wires connection.

*For MSG100/MSG100HK/MSG200/MSG200HK:
Connect the signal cables to the remote/wall controller wires(sequence does not matter). 

*For MSG150/MSG150HK:
Step A: Connect the red and white wires to the remote wires(sequence does not matter). 
Step B: Press the reset button on the device three times to cycle through the modes until it switches to Dry Contact mode.


Step C: Click here to contact customer support and provide the information below, we will send you a sensor kit to detect the door status. 
a. The brand and model of your garage door opener
b. Meross opener order receipt
c. Your shipping address
(If your Meross opener is outside the 2-year warranty period, you'll need to purchase a sensor kit from the Meross shop)
Step D: The sensor connector for the MSG150 is housed internally. Upon receiving the sensor kit, please remove the screws from the bottom of the unit and detach the cover to reveal the connector. You can then proceed to connect the sensor kit.

8. Put the remote control with your smart device together, then you can control the door with your app, but in fact, you control your remote control/wall controller.