Latest 1.4.0
License MIT
Platforms ios 12, requires ARC
Frameworks HomeKit

A simple library for discovering and controlling HomeKit Lights on iOS.

Table of Contents


LightingKit is a simple iOS library for discovering and using lighting accessories via HomeKit. It is specifically designed for dealing with lightbulb accessories.

With LightingKit, you can:

  • Discover new lights and add them to a home and room.
  • Turn lights on and off (included grouped lights).
  • Set the brightness.
  • Change the brightness progressively over a specified duration.
  • Support for hue, and saturation will be added soon.

Installing LightingKit


Add LightingKit as a dependency in your project’s Cartfile:

github "p-morris/LightingKit" ~> 1.0.0

Update your project’s dependencies using Carthage:

carthage update

Make sure that LightingKit.framework is linked in your project’s build settings, and that it is copied as a resource in your project’s build phases.


Add LightingKit to your Podfile:

pod 'LightingKit'

Install LightingKit by running:

pod install

Getting started

1) Enable HomeKit capabilities for your project

Open the "Capabilities" tab for your project. Scroll down to "HomeKit" and switch it to "On".

2) Add the HomeKit Usage Description to Info.plist

Open your project’s Info.plist file, and add the Privacy - HomeKit Usage Description key.

Its value should be a String. This will be shown to the user when they are asked for HomeKit permissions.

Important! – If you fail to add this key to your project’s info.plist file, then your app will crash when you start LightingKit.

3) Create a LightingKit object

Import the LightingKit library into the file you’d like to use it in:

import LightingKit

Most of your interactions with LightingKit with be through the LightingKit class.

Initialize a LightingKit object:

let kit = LightingKit()

4) Connect to HomeKit

Execute your LightingKit object’s start() function to connect to HomeKit:


Important! – Starting LightingKit using the start() function, will prompt the user for HomeKit permissions (if permission has not already been given).

5) Get a callback when LightingKit is ready

Starting LightingKit isn’t much use if you don’t check to see what happened!

To get callbacks, set the LightingKit object’s permissionsDelegate property:

kit.permissionsDelegate = self

Then, have your class conform to the LightingKitPermissionsDelegate protocol in order to receive a callback when LightingKit is ready:

extension ViewController: LightingKitPermissionsDelegate {
    func lightingKit(_ lightingKit: LightingKit, permissionsGranted: Bool) {
        if permissionsGranted {
            // Ready! Now you can control lights!
        } else {
            // Oops! The user didn't grant permission.

Homes, Rooms and Lights

In LightingKit, a user has Homes, Rooms and Lights.


A Home is pretty self explanatory! It represents a particular home, which contains rooms and lights.

You can access an array of the user’s homes via your LightingKit object:

let usersHomes =

You can add a new Home like this:

kit.addHome(name: "29 Neibolt Street") { (home) in
    if let newHome = home {
        // The Home was added successfully!


A Room belongs to a Home.

You can get an array of the rooms within a particular home, by passing a Home object as an argument to your LightingKit object’s rooms(forHome:) method:

let rooms = kit.rooms(forHome: aHome)

A Home can contain an unlimited number of custom rooms. You can add a Room to a Home like this:

kit.addRoom(name: "Bedroom", toHome: myHome) { (room) in
    if let newRoom = room {
        // The Room was added successfully!

The "Default Room"

Every Home contains a default Room.

If the user hasn’t added any custom rooms to their Home, then the Home will still contain one Room: the default room.


A Light belongs to a Room.

You can get an array all of the lights within a particular room like this:

let lights = kit.lights(forRoom: aRoom)

Controlling lights

Turning a light on and off

With a particular Light object in hand, you turn it on and off, via its power property:

light.power?.on(true, completion: { (error) in
    if error == nil {
        // Light was turned on!

You can check to see if a Light is currently powered on as well. The Power property is optional, so it must be unwrapped first:

if let power = light.power, power.isOn {
    // The light is currently turned on!

Setting the brightness

Each Light also has a brightness property, which can be used to access the current brightness of the Light.

The brightness is an Int betweeen 0 and 100 (100 being the highest possible brightness level):

let brightnessLevel = light.brightness?.value

You can set the brightness level like this:

light.brightness?.set(brightness: 50, completion: { (error) in
    if error == nil {
        // The brightness was set!

Setting the brightness over time

You can also update the brightness value of a Light over a set duration.

When you do this, the light’s brightness will be gradually faded from its current value, to the value that you specify.

For example, to set the light’s brightness to 100 over 30 seconds:

light.brightness?.set(brightness: 100, duration: 30, brightnessDelegate: self)

To receive callbacks about the status of a timed brightness update, have your class conform to the TimedBrightnessUpdateDelegate protocol:

extension ViewController: TimedBrightnessUpdateDelegate {
    func brightness(_ brightness: Brightness, valueDidChange newValue: Int) {
        // The brightness was updated to a new value!

    func brightness(_ brightness: Brightness, didCompleteTimedUpdate newValue: Int) {
        // The timed brightness update is complete!

    func brightness(_ brightness: Brightness, timedUpdateFailed error: Error?) {
        // The timed brightness update failed

Setting up new lights

If a light has never been added to HomeKit, then it will have to be added and set up before you can control it with LightingKit.

Adding a Light to HomeKit involves two simple steps: searching for new lights, and then adding them to a room.

1) Searching for lights to set up

Set the searchDelegate property of your LightingKit object, and then start the search:

kit.searchDelegate = self

You’ll need to have your class conform to the LightingKitAccessorySearchDelegate protocol, in order to receive callbacks when a lighting-related accessory is found:

extension ViewController: LightingKitAccessorySearchDelegate {
    func lightingKit(_ lightingKit: LightingKit, foundNewLight light: Light) {
        // LightingKit found a new light!
    func lightingKit(_ lightingKit: LightingKit, foundNewBridge bridge: Bridge) {
        // Don't worry, I'll explain what a bridge is later!

2) Adding a new light to a room

Once you’ve found a Light that needs setting up, you simply add it to a room in order to start the set up process:

kit.add(newLight: light, toRoom: room) { (success) in
    if success {
        // The light was setup, and added to the room!

Important! – Adding a new light to a room will trigger the iOS HomeKit accessory setup process within your app.

Once a new Light has successfully been added to a Room, you can control it as usual!

3) Stopping the search

When you’ve finished looking for new lights, remember to stop the search:


Bridges and bridged lights

Some smartlights require a "bridge" in order to connect to a network. Philip’s Hue lighting, for example, requires such a bridge.

The bridge itself is a hardware accessory that needs to be added to HomeKit.

Once a bridge is added, all of the accessories that are connected to that bridge are automatically available via LightingKit. There’s no need to go through and set up each bridge-connected light one by one.

Setting up a new Bridge

When you conduct a new lighting search with LightingKit, your LightingKitAccessorySearchDelegate will receive a callback when a new bridge is discovered requiring setup:

extension AppDelegate: LightingKitAccessorySearchDelegate {
    func lightingKit(_ lightingKit: LightingKit, foundNewBridge bridge: Bridge) {
        // A new bridge was found

With a new Bridge object in hand, you can set it up like this:

kit.add(newBridge: bridge, toHome: home) { (success, lights) in
    if success {
        // The bridge was set up successfully!

If any lighting accessories are connected to the bridge, they will be passed as an array of Light objects, in the completion. In the above example, lights is an optional array of Light objects (and will be set to nil if no lights were connected to the bridge).

Important! – After a Bridge is set up, any lights that are connected to it are automatically added to the "Default room" of the specified Home. If you wish, you can assign those lights to a Room of your choice:

kit.assignLights(lights: newLights, toRoom: room) { (assigned, failed) in
    if assigned.count > 0 {
        // These lights were successfully assigned to the room!
    if failed.count > 0 {
        // HomeKit failed to add these lights to the room.

Lighting groups

Using the iOS Home app, the user can create a group and add lights to it. This allows them to control all of the lights within that group simultaneously.

In LightingKit, groups of lights are represented by the LightingGroup class.

You can get an array of the LightingGroup objects for a particular Room like this:

kit.lightingGroups(forRoom: room) { lightingGroups in 
    if let lightingGroups = lightingGroups {
        // We have some lighting groups

A LightingGroup object, has a name and unique identifier. It also provides PowerGroup and BrightnessGroup properties for accessing the power and brightness services of all the lights within the group.

To turn on all of the lights in a particular LightingGroup, use its power property:

group.power.on(true) { errors in 
    if errors == nil {
        // All the lights in the group were turned on! 

To set the brightness of all the lights in the group:

group.brightness?.set(brightness: 100) { errors in 
    if errors == nil {
        // The brightness was set for all lights in the group!

You can also set off a timed brightness update on a group:

group.brightness?.set(brightness: 100, duration: 10, brightnessDelegate: self)

To receive callbacks for a timed brightness update to a LightingGroup, you’ll need to conform to the TimedBrightnessGroupUpdateDelegate protocol:

extension ViewController: TimedBrightnessGroupUpdateDelegate {
    func brightnessGroup(_ group: BrightnessGroup, didCompleteTimedBrightnessUpdate errors: [Error]?) {
        if errors == nil {
            // The brightness was updated for all lights in the group!

Issues and Requests

If you come across any bugs, or there is a particular feature that you’d like to see support for, then please file a Github issue and I’ll get back to you.

Latest podspec

    "name": "LightingKit",
    "version": "1.4.0",
    "summary": "A simple iOS library that helps you to discover and control HomeKit lightbulbs.",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    "authors": {
        "Pete Morris": "[email protected]"
    "social_media_url": "",
    "swift_version": "4.2",
    "platforms": {
        "ios": "12"
    "requires_arc": true,
    "source": {
        "git": "",
        "tag": "1.4.0",
        "submodules": true
    "source_files": "LightingKit/**/*.swift",
    "frameworks": "HomeKit",
    "testspecs": [
            "name": "Tests",
            "test_type": "unit",
            "source_files": "LightingKitTests/**/*.swift"

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