Control 433 MHz devices via Matter with Homey

433 MHz devices don’t support Matter directly. Most 433 MHz devices, such as simple remote-controlled plugs, switches, blinds, or doorbells, are not smart by themselves and can’t communicate with Matter.

To control 433 MHz devices in Matter-based platforms, you need a smart home hub that can send 433 MHz radio signals and translate those actions into Matter-compatible controls.

Homey acts as that bridge, exposing 433 MHz actions to Matter.

Homey stays in control of sending radio commands. Matter-based platforms gain access to those actions in a simplified, standardised way.

What is the difference between 433 MHz and 434 MHz?

In smart home contexts, “433 MHz” is commonly used as a shorthand term for a wider radio frequency range known as the 433–434 MHz ISM band. This band is used by many low-power, short-range devices such as remote controls, wireless switches, doorbells, and simple sensors.

Some manufacturers or retailers refer to their products as 434 MHz devices, but in practice these devices usually operate within the same 433–434 MHz frequency range and use the same underlying radio technology. The difference is typically one of naming, not functionality.

For smart home users, this means:

• Devices labeled 433 MHz and 434 MHz usually work in the same way
• They are controlled using the same type of radio signals
• They are supported identically by hubs like Homey

In short, 433 MHz and 434 MHz are not competing standards. They describe slightly different parts of the same radio band, and in everyday smart home use they can be treated as the same category of devices.

What you need

To control 433 MHz devices via Matter, you need:

• A Homey Pro with built-in 433 MHz support or a Homey Bridge, in combination with Homey Pro mini, Homey Cloud or Homey Self-Hosted Server.
• One or more 433 MHz devices configured in Homey
• A Matter-compatible platform, such as Apple Home or Google Home with Matter support

433 MHz devices are set up in Homey by learning or selecting the correct radio signals.

What “exposing devices” means for 433 MHz and Matter

When Homey exposes a 433 MHz device to Matter, it does not expose a real device with live communication.

Instead, Homey exposes actions as Matter-compatible controls.

This means:

• Homey sends 433 MHz radio commands on your behalf
• The 433 MHz device does not report its status
• Matter platforms cannot verify whether a command succeeded

Matter sends a command to Homey, and Homey sends the radio signal.

A simple way to think about it is that Homey turns 433 MHz actions into basic Matter devices.

How to expose 433 MHz devices to Matter with Homey

Exposing 433 MHz devices to Matter is done from within Homey. You don’t need to re-pair devices or change how they’re connected.

The process works like this:

1. Pair 433 MHz devices with Homey
   Make sure the 433 MHz devices you want to use are already added to Homey and working correctly.
2. Open the Matter Bridge settings in Homey
   After installing the Matter Bridge app, open its settings:
   • In the Homey app (iOS / Android): go to More (⋯) → Settings → Matter Bridge
   • In the Homey Web App: go to Settings (⚙︎) → Matter Bridge → Configure
   • Add Homey as a Matter Bridge
     From your Matter controller’s app (such as Apple Home or Google Home), add a new 433 MHz device and scan the QR code shown in Homey.
   • Choose which devices to bridge
     During setup, select which Homey devices you want to expose via Matter. Only the devices you choose will be shared.

After this, the selected devices appear in your Matter platform. They remain paired with Homey, and no additional pairing steps are required.

How the connection works

Behind the scenes, the setup works like this:

1. A Matter platform sends a command
   This can be a tap in an app or a voice command through a Matter-connected assistant.
2. Homey receives the command
   Homey interprets the request as a 433 MHz action.
3. Homey sends a radio signal
   The 433 MHz device receives the command but does not send feedback.

What you can do via Matter

Once exposed, 433 MHz devices appear in Matter-based platforms as standard Matter device types, such as:

• On/Off Lights, Dimmable Lights, Color Lights & Temperature Lights
• Plug-in Sockets
• Thermostats
• Locks
• Blinds, Curtains, Roller Shutters
• Door/Window Sensors
• Temperature & Humidity Sensors
• Motion & Occupancy Sensors
• Air Quality Sensors
• CO2 & Smoke Alarms

You can:

• Control devices in your Matter platform app
• Use voice assistants connected to Matter
• Include devices in Matter-based automations

What to keep in mind

A few important points:

• 433 MHz devices do not report their current state
• Matter cannot confirm whether a radio command worked
• If someone uses the original remote, Homey won’t know
• Matter exposes a simplified control model
• Advanced logic and assumed state handling stay in Homey

Use Matter for cross-platform access and Homey to manage logic and consistency.

In short

433 MHz devices don’t support Matter and don’t report their status.

Homey exposes 433 MHz actions by translating them into Matter-compatible controls, while keeping all radio communication and logic inside Homey.

Homey stays in control of the radio signals and Matter becomes a universal way to trigger them across platforms.

Discover more about Homey by connecting additional devices through the Homey App Store. Control them with the Homey App and create your own automations with Flows and Advanced Flows. Monitor your smart home using Dashboards, and gain deeper understanding with Homey Energy and Insights.

Smart home technologies and platforms supported by Homey

Smart homes often use multiple wireless technologies and platforms. As a powerful smart home hub, Homey supports a wide range of communication standards, including Zigbee, Z-Wave, Matter, Thread, KNX, 433 MHz, Wi-Fi, Bluetooth and Infrared.

Homey also integrates with popular smart home platforms such as Amazon Alexa, Google Home and Apple Home. By combining multiple technologies and platforms in one system, Homey allows devices from different ecosystems to work together in one flexible smart home setup.