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Home > Smart Relays > ZEN16 MultiRelay > ZEN16 & SmartThings > How to Use the ZEN16 MultiRelay as a Garage Door Opener on SmartThings
How to Use the ZEN16 MultiRelay as a Garage Door Opener on SmartThings
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You can automate your standard garage door with the MultiRelay following the steps below. Remember to check your local safety regulations first and make sure you test the device thoroughly after programming it to prevent accidental operation. The ZEN16 MultiRelay is NOT a reliable solution to track the open/close status of your garage door. You will need to install a Z-Wave contact or tilt sensor on the garage door to track its position. It's recommended to always sound an audible alarm (like a loud siren) whenever the doors are being opened or closed remotely.

Here are detailed instructions on how to accomplish an easy and affordable DIY Z-Wave garage door opener solution with the ZEN16 MultiRelay:



The device will work great with simple momentary garage door wall switches. If your garage door opener uses a proprietary wireless control system, you will NOT be able to use the ZEN16 MultiRelay (or any other Z-Wave device) to control the opener.

If you have a simple one-button garage door switch, just use the below diagram to wire the MultiRelay next to it (you can wire up to 3 door switches to a single MultiRelay):

  • WIRING TIPS: Always take "before" pictures just in case you need to restore the original set-up or send us images for consultation. use the correct screwdriver size for the terminal screws on your MultiRelay and wall switches (if connecting them). Use appropriate electrical tools when cutting, prepping, and stripping electrical wires. If you don’t have the necessary tools to perform the installation or are not sure which tools to use or how, please hire an electrician to complete the installation for you. Follow the National Electrical Code and your local safety regulations when performing the installation, including (but not limited to), choosing the correct gauge of jumper wires. The recommended gauge for 15 Amp circuits is 14 AWG and 12 AWG for 20 Amp circuits.
  • POWER OFF: turn the circuit power off in the breaker panel before you start. Keep the MultiRelay unplugged from its power source.
  • DISCONNECT THE SWITCH: Open the switch cover and disconnect the 2 wires coming to it from the opener.
  • CONNECT THE MULTIRELAY: Connect the 2 wires coming from the opener to the R1 terminals on the MultiRelay and run 2 jumper wires between the wall switch screws and Sw1 terminals on the MultiRelay as shown in the below diagram.



If you have a wall switch with a light button on it as well and would like to continue using it to turn the light on, please use the below diagram instead (only for use with this particular type of wall switch):



  • RESTORE POWER: Connect the opener and ZEN16 MultiRelay back to their power source. Click here for the recommended power supply to power the MultiRelay ZEN16. Please do NOT use laptop chargers or Apple accessories with the MultiRelay. NEVER connect DC power and USB power to the ZEN16 at the same time.



  • Z-WAVE OPEN/CLOSE SENSOR: We recommend using a tilt sensor to reliably track the status of your sectional garage door but you can also use any Z-Wave contact sensor for that purpose. You will need an open/close sensor to know whether the door is open or closed.
  • Z-WAVE SIREN: We recommend using a Z-Wave siren to sound an alarm whenever the door is being opened or closed remotely for added safety. You can use any Z-Wave siren for that purpose.



  1. Install a custom driver for the MultiRelay before adding it to SmartThings. Click here for detailed instructions to add the device to SmartThings.
  2. Open your SmartThings app and click on the MultiRelay in your device list. Make sure that all of the child relays are in the OFF state.
  3. Click the 3 dots in the top right corner and click on Settings.
  4. Set the R1 (and R2, R3 if using) switch type setting to "Garage door mode". Exit the settings so they can save.
  5. Anytime you turn on any of the child relays now, the garage door opener will activate to either open or close the garage. The relay will automatically turn off a couple of seconds later, simulating momentary contact.


Once everything is programmed, test it a couple of times to make sure the set-up is fully functional and enjoy your new smart garage door!


If you need help with your set-up, please reach out to us for assistance. Always include your order number and indicate which hub you're using for faster service. Your order number can be from The Smartest House, Amazon, or if - please send us a screenshot of the order confirmation. This information helps us verify your device model to send the correct firmware file.

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