, , ,

KNX to Apple HomeKit Bridge: Complete Guide for Integration

admin avatar

KNX And Apple HomeKit are leading smart home platforms. They are providing robust automation and control of lighting, climate, security, and more. While these systems are powerful on their own, integrating them unlocks their full potential and provides a unified smart home experience.

In this step-by-step guide, you will learn how to integrate your existing KNX Project with Apple’s HomeKit to gain voice control of your KNX devices using Siri, create customized automations between the two platforms, and manage everything from the intuitive Apple Home app. With a compatible KNX IP gateway and HomeKit code, you’ll have your KNX devices added and functioning in Homekit in no time. Take your smart home to the next level by combining the power of KNX and HomeKit.

Lets Understand KNX and Apple HomeKit integration step by step.

What is Apple HomeKit?

Apple Inc. created the Apple HomeKit framework and platform, which enables customers to manage smart home appliances with Apple products such as iPhones, iPads, Apple Watches, and HomePods. It offers a centralized interface for controlling and facilitating communication amongst smart home devices on a single platform.

Numerous smart home appliances, including lights, thermostats, door locks, cameras, and more, are compatible with HomeKit. The Home app on iOS devices used to set up and control smart home devices. All these products are seamlessly integrats with the HomeKit ecosystem.

What is KNX?

KNX home automation is a standardized communication protocol for intelligent buildings that allows you to control and monitor a wide range of building functions from one central device.

The KNX standard defines how different smart devices like lighting controls, security systems, HVAC controls, and sensors can communicate with each other. This interoperability means you can combine products from different manufacturers into one smart home system.

KNX and Apple HomeKit Bridge

To integrate KNX with Homekit, you’ll need a KNX IP interface or KNX IP router, as well as a HomeKit-compatible KNX gateway. The KNX IP interface connects your KNX installation to your home’s IP network, while the KNXnet/IP router acts as a line coupler or IP interface or IP router in one device. The Homekit gateway then connects your KNX system (through IP interface/router) to Apple HomeKit.

Pair the Gateway with HomeKit

  1. Open the Home app on your iOS device and tap the Add Accessory button.
  2. Select ‘Don’t Have a Code or Can’t Scan?’ and enter the Homekit code from your KNX gateway manual.
  3. Give your gateway a name and select the room it will be located in.
  4. The gateway will appear in the Home app, allowing you to control your KNX devices through HomeKit.

You can now add your KNX devices like lights, Curtain, Thermostats and Motion sensors and Other KNX devices to HomeKit and control them using the Home app, Siri or Automation. Give each device a unique name in the Home app to easily identify them. Use HomeKit scenes and automation to schedule and trigger events involving your KNX devices for a seamless smart home experience.

Integrating KNX with Homekit provides a simple and cohesive way to monitor and manage the technology in your home. By linking these two powerful smart home systems, you gain flexibility, convenience and peace of mind knowing your home is connected and under control.

The Benefits of Integrating KNX With HomeKit

Integrating your KNX home automation system with Apple’s HomeKit platform provides several benefits:

Increased Functionality

By linking KNX with Homekit, you gain access to a wider range of smart home features and the ability to control more devices through the Home app and Siri. Homekit supports many useful device categories, including lights, thermostats, door locks, garage doors, air purifiers and humidifiers. Connecting KNX to HomeKit allows you to monitor and manage all these devices from a central point.

Improved User Experience

The intuitive Home app and voice control with Siri provide a seamless user experience for operating your smart home. Through HomeKit, you can control all your KNX-connected devices with simple taps, swipes and verbal commands. Siri allows for convenient hands-free control over your KNX system using natural language.

Enhanced Security

Homekit and KNX both emphasize security and protect your smart home data with strong encryption. When you connect KNX to HomeKit, all communication between the systems is encrypted end-to-end to safeguard your home automation system from unauthorized access. Homekit also requires device authentication to prevent unapproved third-party devices from accessing your setup.

Valuable Integrations

Linking KNX with Homekit opens up useful integrations with other Apple products and services. You can set up automations between KNX devices and HomePod, create scenes with your iPhone or Apple Watch, view your KNX cameras on Apple TV, and monitor your smart home system while away from home using the Home app on iCloud.com. The integrations between these platforms significantly expand your smart home capabilities.

Required Hardware for KNX-HomeKit Integration

To integrate your KNX home automation system with Apple HomeKit, you will need to purchase additional hardware components. The required equipment includes:

KNX IP Interface

The KNX IP Interface acts as a gateway between your KNX installation and your home Wi-Fi network. It receives telegrams from the KNX bus and converts them into network packets that can be transmitted over Ethernet. You will need an interface that supports the KNXnet/IP protocol, such as the Gira G1, ABB i-bus KNX IP Interface Plus, or Schneider Electric M221.

HomeKit-compatible KNX Integration Server

A HomeKit-compatible KNX integration server is responsible for making your KNX devices and functions accessible within the Apple Home app. It establishes a connection between your KNX IP interface and Apple’s HomeKit framework in the cloud. Popular options include the Eaton xComfort HomeKit Server, ABB KNX HomeKit Server, and Schneider Electric Wiser for KNX Multi-Protocol Server. These servers allow you to monitor and control your KNX devices such as lights, shutters, heating, and security systems directly through Homekit.

Ethernet Router

To connect the KNX IP interface and HomeKit server to your network, you will require an Ethernet router. Both devices are connected to the router via Ethernet cables, which then provides access to your Wi-Fi network and the Internet. Most standard home routers will work for this purpose.

Wi-Fi Access Points (optional) – For larger homes, you may need additional Wi-Fi access points to ensure full coverage and connectivity between all hardware components.

Following the installation of this equipment by a certified KNX partner, you will be able to add your KNX devices to the Home app and control your home automation system using Siri voice commands, the Home app, and Homekit accessories. Please note that KNX devices themselves do not require a software update or any configuration changes to work with Homekit. The integration is handled entirely by the KNX IP interface and HomeKit server.

Step-by-Step Guide to Setting Up a KNX-HomeKit Gateway

To integrate your KNX home automation system with Apple HomeKit, you will need to set up a KNX-HomeKit gateway. This device connects your KNX network to your home Wi-Fi network so that HomeKit can access your KNX devices.


To get started, you will need:

  • A KNX IP interface or KNXnet/IP router
  • A KNX-HomeKit gateway (e.g. HDL Smart Control Pro)
  • An Apple Home hub (HomePod, HomePod mini, Apple TV 4K or later)


  1. Connect your KNX IP interface or KNXnet/IP router to your KNX bus. This connects your KNX system to your local network.
  2. Connect your KNX-HomeKit gateway to your local network. This can be done via Ethernet or Wi-Fi.
  3. In the gateway web interface, enable the HomeKit integration. You may need to update the gateway firmware.
  4. Open the Home app on your iPhone or iPad and tap Add Accessory. Select the gateway from the list of available accessories to add it to the Home app.
  5. Follow the on-screen prompts to scan the Homekit code on your gateway or enter the gateway’s Homekit code manually. Your KNX system accessories should now appear in the Home app.
  6. Customize the names of rooms and accessories in the Home app to match your KNX system’s configuration. You can organize your KNX devices into zones and rooms to match your home.
  7. Test that you are able to control your KNX devices through the Home app and using Siri voice commands. Make any final changes to the configuration as needed.

Your KNX system should now be fully integrated with Homekit, allowing you to control and automate your home’s lighting, climate control, security system and more using the Apple Home app and Siri on your iPhone, iPad, Apple Watch, HomePod and Apple TV.

Troubleshooting Common Issues With KNX-HomeKit Integration

Troubleshooting issues with KNX-Homekit integration typically involves checking a few key areas. By systematically working through each potential problem area, you can get your smart home integration back up and running.

Check Your Internet Connection

Both KNX and Homekit require a stable internet connection to function properly. Ensure your router, cables, and other network equipment are working correctly and providing connectivity to all smart home devices.

Review IP Addresses

Double check that the IP address for your KNX interface module is properly configured and reachable within your network. The IP address allows Homekit and the KNX system to communicate, so if it is incorrect or has changed, the integration will fail. You may need to restart your router to refresh its IP address table.

Reset or Re-Add Accessories

If individual KNX accessories or groups are unresponsive in the Home app, you may need to reset or re-add them. Go to the accessory details screen in the Home app and tap “Reset Accessory” or “Remove Accessory” to reset or delete the device from Homekit. Then re-add it by tapping “Add Accessory” and following the on-screen prompts. This will re-establish the connection between KNX and HomeKit for that device.

Update Firmware

Outdated firmware on your KNX components like the interface module, actuators or sensors can sometimes cause connectivity issues. Check with your KNX equipment manufacturers for the latest firmware updates and install as directed. Firmware updates often contain security patches and compatibility fixes to ensure proper operation.


With the steps outlined in this guide, you now have the knowledge to integrate your KNX home automation system with Apple’s HomeKit platform. By connecting the KNX IP interface to your home network and pairing it with the Homekit app on your iPhone or iPad, you’ve unlocked powerful new ways to monitor and control devices in your smart home.
Through the intuitive Home app, you can now access your KNX-enabled lights, thermostats, locks, and more using simple voice commands with Siri or the tap of a button. Homekit scenes and automations also allow you to easily group accessories together and create customized triggers to suit your daily routines.
By combining the robust functionality of KNX with the convenience of Homekit, you’ve brought your smart home to the next level. Your home is now not only automated but seamlessly connected, putting you in complete control of your space at home or on the go. The future of home automation is integrated, and you’re at the cutting edge.

Tagged in :

admin avatar