LiftMaster Smart Garage Control

User Manual and Installation Guide

Overview

This document provides information on the LiftMaster Smart Garage Control, including its features, setup, and troubleshooting. The Smart Garage Control allows users to monitor and control up to two garage door openers, one Yale® | LiftMaster® Lock, and 16 myQ® accessories via the myQ App.

Key Components: Hub, Door Sensor, Power Adapter, Mounting Hardware, Warning Placard.

Model: 821LMC

What's in the Box

Specifications

Get to Know Your Smart Garage Control

The system comprises the Hub and a Door Sensor. The Hub connects to your home Wi-Fi and the myQ app, allowing control of garage door openers, smart locks, and other myQ accessories.

[Diagram showing system components: Door Sensor, Remote LED Light, Garage Door Opener, Hub, Remote Light Control, Smart Lock, Remote Light Switch, and the myQ App interface.]

Buttons and LEDs

The Hub features several indicators and buttons:

Set Up Your Smart Garage Control

What You Need

Connect Your Smart Garage Control

  1. Download the myQ app from the Apple App Store or Google Play Store.
  2. Set up your account and log in.
  3. Tap (+) to add your Smart Garage Control. The app will guide you through:
    • Connecting the hub to your home Wi-Fi network.
    • Pairing the Door Sensor to the Hub.
    • Mounting the Door Sensor.
    • Pairing the hub to your garage door opener.
    • Mounting the Hub.

Congratulations! Installation is complete.

Check Your Wi-Fi Signal

Hold the device where you plan to mount the hub to check the Wi-Fi signal strength. A strong signal is recommended for optimal performance.

Signal Status:

Pair the Door Sensor to the Hub

The myQ app pairs the door sensor during initial setup. To add a second sensor, use the (+) option in the app.

Mount the Door Sensor

Mount the door sensor (top facing up) on the top panel of the garage door using the provided hook and loop adhesive strips or optional screws. Test the door sensor battery every 6 months.

[Diagram: Door sensor mounting location on garage door panel, showing "TOP" facing up, hook and loop strips, and a coin/screwdriver for prying open the sensor.]

Choose the Hub Location

Select a location for the hub that is:

[Diagram: Illustrating ideal hub mounting area with distance indicators.]

Mount the Hub

  1. Use the mounting plate to mark drill holes with the arrow facing up.
  2. Drill holes using a 5/32" bit.
  3. Insert drywall anchors until flush.
  4. Attach the mounting plate with screws.
  5. Place the hub on the mounting plate at an angle and rotate until secure. Wrap excess power cable around the hub and mounting bracket.
  6. Attach the warning placard (⚠️) on the wall next to the door control.

How-To Video

A video guide is available for installing the LiftMaster® Smart Garage™™ Control and getting connected using the myQ App. [Video player thumbnail shown with ▶️ icon.]

Add myQ Smart Partners and Accessories

The Smart Garage Control is compatible with various interactive service providers and accessories. Explore "myQ smart partners" or "Works with myQ" in the app, or refer to "Accessories and Parts".

Need Help?

Troubleshooting Videos

A series of videos are available to help with common issues:

Garage Door Opener Compatibility

Compatible with most openers manufactured after 1993 using photoelectric sensors that do not shut off. Not compatible with openers where sensors change power mode (e.g., lights turn off after closing) or Chamberlain Group openers with a yellow learn button (2010-2021), or Linear openers. Check compatibility by manufacturer.

Router Compatibility and Settings

Ensure your router has the following settings:

Refer to "Router settings and compatibility" for more details.

How to Improve Your Wi-Fi Signal

To address weak Wi-Fi signals ? in the garage:

Test the Door Sensor Battery

Test the battery every 6 months or if the control is not working as expected:

  1. Press and release the test button (?️) on the door sensor. The red LED should blink, and the hub should beep.
  2. Repeat this test 5 more times, waiting 5 seconds between each press.
  3. If the LED does not blink or the hub does not beep, check the pull tab, ensure there is no debris on the battery, or replace the battery (see "Replacement Parts").

Change the Door Sensor Battery

  1. Pry the latch panel on the bottom of the door sensor with a coin or screwdriver and lift the top to remove it.
  2. Using a soft non-conductive tool (like a cotton swab), gently push the coin battery out.
  3. Gently insert the new battery and replace the cover.

Dispose of batteries properly. Use only 3V CR2450 coin batteries.

[Diagram: Showing how to pry open the door sensor with a coin/screwdriver.]

Pair a Replacement Door Sensor

Follow these steps to replace an existing sensor:

  1. Test the existing sensor. The hub will beep once for Door 1 or twice for Door 2.
  2. If the sensor doesn't work, test the other sensor (if applicable) to identify its door number.
  3. Remove the pull tab from the new sensor.
  4. On the hub, press the button for the corresponding door (1 or 2). A solid amber LED will appear.
  5. Press the test button (?️) on the new sensor. The hub will flash and beep to confirm programming.
  6. Mount the door sensor.
  7. Verify operation in the myQ app.

[Diagram: Showing Hub buttons (Door 1, Door 2, Test) and Door Sensor with Pull Tab.]

You Have Reached the Maximum Number of Doors

The hub supports a maximum of two door sensors and two garage door openers. An error message will appear if this limit is exceeded.

How to Manually Add a Door Sensor

If the app fails to add a sensor:

  1. Clear channels: Press and hold Button 1 on the hub until the amber LED turns off. Repeat for Button 2.
  2. Press and release Button 1 on the hub.
  3. Press and release the test button (?️) on the door sensor. The hub will beep and flash.
  4. Log into the myQ app. The garage door should appear in "Monitor Door Only".
  5. Tap the blue bar and proceed with pairing the garage door opener.

Erase Wi-Fi Settings from the Hub

To reset Wi-Fi settings:

  1. Ensure the green LED (?) is on or blinking.
  2. Press and hold the ⚙️ (Settings) button on the hub until the blue LED (⚙️) blinks.

Reset the Hub to Factory Default

This erases Wi-Fi settings and removes the device from your myQ account.

  1. Press and hold the ⚙️ (Settings) button on the hub until the blue LED (⚙️) starts blinking, then release.
  2. While the blue LED is blinking, press and hold the ⚙️ (Settings) button again until the blue LED pauses then blinks or beeps.

Refer to "Connect Your Smart Garage Control" for reinstallation.

Update My Network Settings in the myQ App

If your router or network settings change, update them in the myQ app to reconnect your Smart Garage Control.

LED Indicators

The LEDs on the hub indicate its status:

LED StatusMeaningTroubleshooting / If unable to connect
Blinking blue and green ?Hub unable to connect to Wi-Fi router.
  • Move hub closer to router.
  • Restart router.
  • Check for network security blocking (Firewall, MAC filtering).
  • Update Wi-Fi settings in myQ app.
Blinking blue ⚙️Hub attempting to connect to mobile device.
  • Ensure Bluetooth is enabled on mobile device.
  • Verify correct network password.
  • Restart hub.
  • Disable/re-enable Bluetooth on mobile device.
Solid blue ⚙️Hub unable to connect to home Wi-Fi network.
  • Restart router.
  • Check for network security blocking.
  • Ensure router TCP/UDP port 8883 is open.
Blinking green ?Hub unable to connect to internet or myQ server.
  • Restart router.
  • Check for network security blocking.
  • Ensure router TCP/UDP port 8883 is open.
Solid green ?Hub successfully connected to myQ server.N/A
Solid amberDoor button 1 or 2 pressed.Press test button (?️) on door sensor to pair.
Blinking amberDoor sensor pairing to hub.Press test button (?️) on door sensor to pair.
No LEDHub idle or no power.
  • Check power cord connection.
  • Test outlet with a lamp. Check circuit breaker if lamp doesn't work.
  • Try a different outlet. If still no LED, replace hub.

The App Says Monitor Mode

The door sensor is paired, but the garage door opener is not. In the myQ app, tap "Monitor Mode" to attempt pairing. If the hub is mounted high, consider moving it closer to the ground and away from metal objects. Operate the garage door twice using the wall control.

App Error Messages

Locate a Garage Door Opener Program or Learn Button

Instructions and diagrams are provided for locating the program/learn buttons on various brands:

[Diagrams illustrating button locations for each brand are described here.]

Note: Specific compatibility notes are provided for US users regarding Chamberlain openers with yellow learn buttons.

Accessories and Parts

Accessories

Replacement Parts

One Year Limited Warranty

The Chamberlain Group LLC warrants the product against defects in materials and workmanship for one year from the date of purchase for the original consumer purchaser.

Software Agreement

Use of the product and embedded software is subject to copyright notices, terms, and conditions available at www.myLiftMaster.com/agreement.

Safety Information and Compliance

WARNING: Reduce Risk of Severe Injury

California Proposition 65 Warning

This product may expose users to chemicals, including lead, known to cause cancer or birth defects. Visit www.P65Warnings.ca.gov for more information.

FCC and Industry Canada Compliance

This device complies with Part 15 of FCC rules and Industry Canada's license-exempt RSSs. Operation is subject to two conditions: no harmful interference, and acceptance of any received interference. Unauthorized modifications may void user authority.

A minimum 20 cm (8 in.) distance must be maintained between users/bystanders and the device.

The device has been tested and complies with Class B digital device limits, providing reasonable protection against harmful interference in residential installations. If interference occurs, users are encouraged to reorient the antenna, increase separation, connect to a different circuit, or consult a technician.

Trademarks

Chamberlain, Chamberlain logo, LiftMaster, myQ, and myQ logo are registered trademarks of The Chamberlain Group LLC. Wi-Fi® is a trademark of Wi-Fi Alliance®. Yale is a trademark of ASSA ABLOY Residential Group, Inc. Overhead Door and Wayne Dalton are trademarks of Overhead Door Corporation. Genie is a trademark of GMI Holdings, Inc. Stanley is a trademark of Stanley Logistics L.L.C. Sommer is a trademark of Sommer Antriebs-und Funktechnik GmbH. Guardian is a trademark of ADH Guardian USA LLC. Xtreme Garage and Performax are trademarks of Menard, Inc. Other trademarks are property of their respective owners.

For more information, visit www.devancocanada.com or call 855-931-3334.

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