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homebridge-unifi-protect: Native HomeKit support for UniFi Protect

Homebridge UniFi Protect

Downloads Version UniFi Protect@Homebridge Discord verified-by-homebridge

HomeKit support for the UniFi Protect ecosystem using Homebridge.

homebridge-unifi-protect is a Homebridge plugin that provides HomeKit support to the UniFi Protect device ecosystem. UniFi Protect is Ubiquiti's video security platform, with rich camera, doorbell, and NVR controller hardware options for you to choose from, as well as an app which you can use to view, configure and manage your video camera and doorbells.

Doorbell Support

If you're reading this, chances are you own, or would like to own, a UniFi Protect doorbell. Currently, Ubiquiti sells one doorbell - the UniFi Protect G4 Doorbell, and it's quite a nice device. You can read all about the features and specs elsewhere, but for our purposes, I'm going to focus on talking about the handful of features that are most relevant for HomeKit users in particular:

  • Two-way Audio Support

    • homebridge-unifi-protect supports two-way audio, and it works well with one notable caveat: a lack of acoustic echo cancelation, or AEC.
  • Doorbell Ring Support

    • homebridge-unifi-protect fully supports doorbell ring notifications. When you ring the doorbell, you'll get a notification on your iOS/macOS devices, including a snapshot of whose at the door. These snapshots tied to notifications are often called rich notifications.
  • Doorbell Camera and Motion Detection Support

    • Since the G4 Doorbell is essentially a camera as far as UniFi Protect goes, homebridge-unifi-protect supports all the same features as other UniFi Protect cameras, including motion detection and blazing fast and responsive video streaming.
  • Doorbell Messages

    • An interesting and novel feature of the G4 Doorbell is that it has it's own LCD screen. You can choose to set a message on this screen for people to see. Messages can be set indefinitely, selected from a preexisting list after the doorbell is rung, or you can type in a message in realtime at any point. homebridge-unifi-protect has full support for setting messages on your doorbell.

Two-way Audio

  • Protect cameras and doorbells that support two-way audio are full-duplex, meaning they transmit and receive audio simultaneously. This creates a problem - without using some method to eliminate your own voice from what gets picked up by the speaker, you will inevitably hear your own voice back whenever you use the microphone in the Home app, however the person standing in front of the doorbell will hear things normally.

  • Unfortunately, AEC is not a solved problem in the open source community quite yet, though there are great commercial options. There are a couple of glimmers of hope: Protect cameras appear to actually support AEC, though there doesn't appear to be a straightforward way to access this capability at the moment. The second is that, things do work quite well, aside from the unfortunate challenge around AEC for the person using the Home app.

  • Two-way audio is enabled by default. You can disable it, through the Audio.TwoWay feature option.

  • Finally, since someone will inevitably ask: Ring and Nest-Cam (terrific plugins by terrific developers) - don't have this problem because Ring and Nest send all audio back to Ring and Nest's servers where audio is processed and dealt with, including AEC.

Doorbell Rings

HomeKit is a great home automation platform in many ways. Where there are gaps in HomeKit support, plugins like this one help to fill it by providing HomeKit support for devices without native HomeKit support. Every so often, however, you run into something that really is a limitation of the HomeKit platform that you need to work around. Doorbell ring automation is one of those things.

This plugin supports HomeKit's native video doorbell and doorbell ring functionality. What HomeKit lacks though is a way to trigger an automation when a ring occurs. There's currently no way to say something like when the doorbell rings, and it's nighttime, turn on the front porch lights. It's impossible to tell if this is an oversight or intentional on Apple's part. Until Apple chooses to provide that capability, what can we do?

Enter automation support for doorbell ring events in this plugin. If you choose to enable support for doorbell ring automation, you can create HomeKit automations based on doorbell ring events. Here's how it works:

  • Enable the Doorbell.Trigger feature option in the plugin configuration. See the Feature Options documentation for more information on feature options.

  • This will create a contact sensor service on the doorbell. Whenever the doorbell rings, the contact sensor will be triggered and set to the open state for two seconds, before resetting to the closed state again.

  • You can create automations in HomeKit based on this by using the contact sensor as a proxy for the doorbell ring.

  • This feature is disabled by default. At it's core this feature is a workaround for a limitation in HomeKit for a narrow, but very real, use case. I've chosen to err on the side of keeping things as clean as possible when it comes to exposing services within the plugin, while providing more sophisticated functionality like this feature to those who want it.

Doorbell Messages

Before we get to configuring this feature in HomeKit, let's discuss what this feature is and what design decisions I've chosen to make in implementing this feature for HomeKit.

How Doorbell Messages Work In UniFi Protect

The messages feature in the G4 Doorbell is essentially an LCD display on the doorbell that users can configure. The LCD display actually remains off until it detects motion, at which point it will display WELCOME or whatever message may have been placed there indefinitely by the user. Users can set a message at any time on the doorbell.

UniFi Protect has a couple of default messages built in, specifically:

  • Do not disturb
  • Leave package at door

These messages are always available to you in the UniFi Protect app and they can't be deleted or hidden. In addition to those, you can type in any message you'd like, using the UniFi Protect app, up to a limit of 30 characters. Additionally, you can choose to save any message you create, making it easy to quickly select it from a list the next time you're in the app.

When you select a message to be displayed, you can also set a duration on that message. The message duration tells UniFi Protect how long to leave the message on the screen before returning to the default message WELCOME. By default, when a message is selected, it remains visible for 60 seconds. You can set a message to remain in place indefinitely, or at various preconfigured durations within the UniFi Protect app.

How Doorbell Messages Work In homebridge-unifi-protect

There are a few challenges in implementing this feature for HomeKit, but the most significant one is that there's no way to take direct user input, like text. So what do we do? I decided to take the essence of this feature - preconfigured messages that you can set for arbitrary durations - and make it available through HomeKit as a switch.

Here's how it works:

  • homebridge-unifi-protect will read, in realtime, any messages that are saved in UniFi Protect. That means at a minimum, you'll always have the built in Do not disturb and Leave package at door messages available to you, in addition to any other messages you choose to setup in the UniFi Protect app.

    • This gives you the flexibility to add and remove messages at a whim, and this plugin will make sure those messages are available for you to use in HomeKit on a dynamic basis. What you get, is the simplicity of having a single place for all the messages you want to use with your doorbell - whether it's using the UniFi Protect iOS app or the Home app.

    • Messages you set within the Home app that come from UniFi Protect will always have a 60 second duration. This is because Protect doesn't allow you to save a duration, only the message. There's no way for me to tell how long you intended to display this message for, so we do what Protect does by default - display the selected message for 60 seconds.

  • You can also configure messages in Homebridge - either in addition to, or in place of, whatever is saved in UniFi Protect.

    • This approach provides you the most customization, but it comes at the expense of needing to reboot Homebridge whenever you want to make changes. In practice, I don't find this to be much of an issue when you combine this with the previous option. The combination allows you to use the flexibility provided in configuring messages through Homebridge, with the convenience of more ad hoc messages that you may need on a temporary basis.

    • Messages configured within Homebridge (either through editing your config.json or using the Homebridge webUI), can have duration information associated with them. You can choose to display a message indefinitely, or for any amount of time you choose, without restriction.

  • All configured messages - those that come from UniFi Protect and those that you configure in Homebridge - will be made available as individual switches on the doorbell accessory in the Home app. You can set or clear a given message by activating or deactivating the associated switch in the Home app.

    • Any message switch that's made available through HomeKit will reflect it's true state, whether it was activated within the Home app or through the UniFi Protect app. You'll always know what's being displayed on the doorbell, so long as it's not an ad hoc message that hasn't been saved in the UniFi Protect interface.
  • When someone rings the doorbell, you'll receive a rich notification. If you swipe down on that notification, you'll see a complete list of all the message switches associated with the doorbell. While two-way audio isn't available through HomeKit, you can select any of the preset messages you've configured to communicate with the person who rang the doorbell.

Configuring the Doorbell Messages Feature

Doorbell messages can be configured using the Homebridge webUI, and I would encourage you to use that as the primary configuration method for this plugin - it contains additional validation checking (e.g. character length) to ensure the configuration is always valid.

For those of the command-line persuasion, you can see what an example config.json looks like when configured with doorbell messages:

  "platform": "UniFi Protect",

  "options": [

  "controllers": [
      "name": "My UniFi Protect Controller",
      "address": "",
      "username": "some-homebridge-user",
      "password": "some-password",
      "doorbellMessages": [
           "message": "Be right there.",
           "duration": 90
doorbellMessages Description
message The message text to display on the doorbell.
duration The duration, in seconds, that you want to display the message for on the doorbell. If not specified, it defaults to the UniFi Protect default, 60 seconds. If set to 0, the message will display indefinitely.

There are also two feature options that you can use to either disable the messages feature entirely, or, to tell homebridge-unifi-protect to only display the messages you've configured within Homebridge in HomeKit:

Feature Options Description
Enable.Doorbell.Messages Enable the doorbell messages feature on UniFi Protect doorbells. (Default)
Disable.Doorbell.Messages Disable the doorbell messages feature on UniFi Protect doorbells.
Enable.Doorbell.Messages.FromDoorbell Allow messages saved on the UniFi Protect doorbell to appear as switches in HomeKit. (Default)
Disable.Doorbell.Messages.FromDoorbell Prevent messages saved on the UniFi Protect doorbell from appearing as switches in HomeKit.

To learn more about feature options and how to use them, see the Feature Options page.

MQTT Support

MQTT support is available for doorbells. In addition to all the MQTT functionality that is supported for all UniFi Protect cameras, there are two doorbell-specific MQTT actions that are supported:

  • When the doorbell is rung, a message will be published to MQTT.
  • You can set Doorbell messages through MQTT. This provides a more rich experience by allowing you to set any arbitrary message on a dynamic basis.

To learn more about the MQTT support provided by this plugin, see the MQTT page.

Some Fun Facts

  • There is a 30 character limit to what can be displayed on the LCD.
  • No, you can't use emojis. Would've been nice, right?
  • No, you can't have newlines / carriage returns either. These are limitations in what the doorbell displays, not ones imposed by homebridge-unifi-protect. In my testing, it supports basic formatting and regular text, and that's it.
  • No, you can't display cool icons like the builtin do not disturb and leave package at door settings do. Would be nice, but these just aren't accessible. Would be an awesome feature to have though, if Ubiquiti chooses to make it customizable in the future.
  • You get more flexibility in formatting when using the plugin-centric configuration option rather than configuring messages in Protect directly. Protect will always uppercase any message you enter. homebridge-unifi-protect will honor whatever case and formatting you enter.
  • There's no practical limit to the number of messages you can configure.