Zigbee IR Blaster for Home Assistant: ZHA vs Zigbee2MQTT

A Zigbee IR blaster for Home Assistant allows users to integrate traditional infrared-controlled appliances into a smart home automation system. Instead of replacing an existing split air conditioner, users can send infrared commands through a Zigbee-connected controller to manage compatible air conditioning functions.

For Home Assistant users, two common Zigbee integration options are ZHA (Zigbee Home Automation) and Zigbee2MQTT. Both can connect Zigbee devices to Home Assistant, but device compatibility, supported features, and configuration methods may differ.

This guide explains how Zigbee IR blasters work with Home Assistant, compares ZHA and Zigbee2MQTT, and explores practical considerations for controlling split air conditioners.

Does a Zigbee IR Blaster Work with Home Assistant?

Yes. A compatible Zigbee IR blaster can work with Home Assistant through a supported Zigbee integration.

Unlike a conventional Wi-Fi IR controller, a Zigbee IR blaster communicates with a Zigbee coordinator, which connects the device to a smart home automation platform.

The basic control process is:

Home Assistant → Zigbee Integration → Zigbee IR Blaster → Infrared Commands → Air Conditioner

When a user adjusts an air conditioning setting in Home Assistant, the Zigbee integration sends a command to the IR controller. The controller then transmits an infrared signal to the air conditioner, similar to a traditional handheld remote.

Depending on the device and integration, available controls may include:

• Air conditioner power control
• Target temperature adjustment
• Cooling, heating, and fan operating modes
• Fan speed selection
• Airflow or swing settings
• Temperature sensor readings

Not every Zigbee IR blaster exposes the same functions. Users should verify the specific device model and integration before deployment.

ZHA vs Zigbee2MQTT: What’s the Difference?

ZHA and Zigbee2MQTT are two widely used methods for integrating Zigbee devices with Home Assistant.

Although both enable Zigbee device communication, they use different software architectures and device support mechanisms.

What Is ZHA?

ZHA stands for Zigbee Home Automation. It is a Zigbee integration built into Home Assistant.

With a compatible Zigbee coordinator, users can connect Zigbee devices directly through the Home Assistant interface without installing a separate Zigbee2MQTT service.

Key characteristics include:

• Native integration within Home Assistant
• Device pairing and management through the Home Assistant interface
• Support for compatible Zigbee coordinators
• Local Zigbee device communication
• Automation using supported device entities and events

For users who prefer a simpler software architecture, ZHA can be a practical option.

However, the functions available for a particular Zigbee IR blaster depend on its device support implementation.

What Is Zigbee2MQTT?

Zigbee2MQTT is an open-source Zigbee integration platform that connects supported Zigbee devices to MQTT-based automation systems.

It typically operates with a compatible Zigbee coordinator and an MQTT broker.

In Home Assistant, the communication process generally follows:

Home Assistant ↔ MQTT Broker ↔ Zigbee2MQTT ↔ Zigbee Coordinator ↔ IR Blaster

Zigbee2MQTT provides a device database containing supported models and their available functions.

Key characteristics include:

• Integration with Home Assistant through MQTT
• Device-specific feature documentation
• Access to supported Zigbee device functions
• Device configuration and diagnostic options
• Compatibility with supported Zigbee coordinators

For users who want to inspect available device functions before installation, the Zigbee2MQTT device database can be particularly useful.

ZHA vs Zigbee2MQTT for Zigbee IR Blasters

The best integration depends on the specific IR blaster model, the functions exposed by each integration, and the requirements of the automation project.

Important: Neither ZHA nor Zigbee2MQTT automatically guarantees full compatibility with every Zigbee IR blaster.

For example, a device may pair successfully but expose only some of its available infrared control functions.

Before selecting an integration, verify that the required air conditioning controls are supported.

How to Set Up a Zigbee IR Blaster with Home Assistant

The general installation process involves selecting a compatible coordinator, pairing the IR blaster, and configuring the air conditioner.

Step 1: Prepare a Zigbee Coordinator

Home Assistant requires a compatible Zigbee coordinator to communicate with Zigbee devices.

Choose a coordinator supported by your intended integration.

Some coordinators can be used with either ZHA or Zigbee2MQTT, but the same coordinator generally should not be controlled by both integrations simultaneously.

Step 2: Select ZHA or Zigbee2MQTT

For ZHA, configure the Zigbee integration directly in Home Assistant.

For Zigbee2MQTT, install and configure Zigbee2MQTT with a compatible MQTT broker, then connect it to Home Assistant.

Select the integration based on your preferred architecture and confirmed device support.

Step 3: Pair the Zigbee IR Blaster

Power on the IR blaster and follow the manufacturer’s pairing instructions.

Enable device joining in the selected Zigbee integration and wait for the controller to appear.

Once paired, check whether Home Assistant recognizes the expected device functions.

Step 4: Configure the Air Conditioner

Depending on the IR blaster model, configuration may involve:

• Selecting a built-in infrared code set
• Matching the air conditioner brand or remote-control protocol
• Learning commands from an existing infrared remote
• Testing temperature and operating mode commands

The exact procedure varies by device and integration.

Step 5: Test the Available Controls

Before creating automations, verify that the air conditioner responds correctly.

Test the essential functions, such as power, temperature adjustment, operating mode, and fan control.

Also confirm that the IR blaster is positioned where its infrared signals can reach the air conditioner’s receiver.

Can a Zigbee IR Blaster Control Any Air Conditioner?

Not necessarily.

A Zigbee IR blaster can control an air conditioner only when the controller supports the required infrared commands and can transmit them to the appliance.

Compatibility depends on several factors.

IR Code Compatibility

Different air conditioner manufacturers use different infrared protocols and command structures.

Some Zigbee IR controllers include a built-in code library for common split air conditioner brands.

Others provide infrared learning functions that allow users to capture supported commands from an existing remote.

IR Signal Placement

Infrared communication generally requires a suitable transmission path between the controller and the air conditioner.

Walls, furniture, and poor device positioning can prevent commands from reaching the receiver.

Available Integration Functions

Even if an IR blaster supports a particular air conditioner, Home Assistant may expose different functions depending on the integration.

For example, basic temperature and mode control may be available while certain advanced remote-control functions require additional support.

For reliable deployment, verify both the air conditioner IR compatibility and the Home Assistant integration features.

OWON AC201: A Zigbee IR Blaster for Home Assistant

The OWON AC201 Zigbee IR Blaster is designed to integrate compatible split air conditioners and other supported infrared appliances into Zigbee-based automation systems.

AC201 supports both ZHA and Zigbee2MQTT integration options for Home Assistant applications. Available controls depend on the integration configuration and supported device functions.

Key Features of OWON AC201

• Zigbee IR Control: Converts Zigbee commands into infrared signals for compatible appliances.
• Home Assistant Integration: Supports ZHA and Zigbee2MQTT.
• Built-in IR Code Library: Provides infrared codes for mainstream split air conditioners.
• IR Learning: Supports learning compatible commands from existing infrared remotes.
• 120° IR Coverage: Offers wide-angle infrared transmission.
• Multiple Device Support: Supports pairing with up to five air conditioners and learning from up to five IR remotes, with up to five learned button functions per remote.
• Flexible Power Plug Options: Interchangeable US, EU, UK, and AU plug versions.

The AC201 is suitable for residential smart home systems, apartment automation, and HVAC retrofit projects where existing infrared-controlled equipment needs to be integrated without replacement.

For product specifications and integration inquiries, explore the OWON AC201 Zigbee IR Blaster product page.

Common Zigbee IR Blaster Problems in Home Assistant

Even when a Zigbee IR blaster is compatible with Home Assistant, installation and configuration issues can occur.

1. The IR Blaster Does Not Appear in Home Assistant

Check that the device is powered on and in pairing mode.

Confirm that the Zigbee coordinator is functioning and that the selected integration supports the device.

If necessary, reset the IR blaster and repeat the pairing process according to the manufacturer’s instructions.

2. The Device Pairs but Cannot Control the Air Conditioner

Successful Zigbee pairing does not necessarily mean the correct infrared commands have been configured.

Check the selected IR code set or learned remote-control commands.

Also verify that the infrared transmitter is positioned correctly.

3. Some Air Conditioner Functions Are Missing

Supported functions may differ between ZHA and Zigbee2MQTT.

Review the available device entities, supported commands, and integration documentation.

If a required function is missing, confirm whether it is supported by the specific integration before attempting additional configuration.

4. Home Assistant Shows an Incorrect AC State

Most conventional infrared-controlled air conditioners do not send their operating state back to the IR blaster.

As a result, Home Assistant may display the last requested state rather than the air conditioner’s actual physical state.

For example, using the original handheld remote may change the air conditioner without updating Home Assistant.

This limitation is important when designing automations that depend on accurate equipment status.

Choosing the Right Zigbee IR Blaster for Your Project

For individual homes, the main considerations are compatibility, ease of setup, and reliable infrared transmission.

For professional HVAC and building automation projects, additional factors may include:

• Compatibility with existing split air conditioners
• Integration with the selected Home Assistant architecture
• IR code library and learning capabilities
• Installation location and infrared coverage
• Device management across multiple rooms
• OEM/ODM customization and system integration requirements

A plug-in controller such as OWON AC201 is a practical option when a suitable power outlet and infrared transmission path are available.

For projects requiring concealed installation, a controller with an external infrared emitter and remote temperature probe, such as the OWON AC221, may be more appropriate.

FAQ

Does a Zigbee IR blaster need a Zigbee gateway?

A Zigbee IR blaster requires a compatible Zigbee network controller. For Home Assistant, this typically means a supported Zigbee coordinator configured with ZHA or Zigbee2MQTT.

Can I use ZHA and Zigbee2MQTT together?

Yes, Home Assistant can use both integrations when they operate with separately configured Zigbee coordinators and networks. A single coordinator generally cannot be shared between them simultaneously.

Does a Zigbee IR blaster work without the internet?

Zigbee communication and locally configured Home Assistant automations can operate without internet access, provided the required local services and equipment remain available.

Can a Zigbee IR blaster read the actual air conditioner status?

Usually not directly. Traditional infrared communication is generally one-way, so the controller may not know whether the air conditioner was changed using another remote.

Some systems use additional sensors or integrations to improve state estimation.

Conclusion

Choosing between ZHA and Zigbee2MQTT for a Zigbee IR blaster depends on device compatibility, available control functions, and the preferred Home Assistant integration architecture.

ZHA offers native integration within Home Assistant, while Zigbee2MQTT provides an MQTT-based approach with model-specific device documentation.

For users integrating existing split air conditioners, selecting a compatible IR blaster and verifying its supported functions are more important than choosing an integration based on popularity alone.

OWON AC201 offers Zigbee infrared control, built-in IR codes, IR learning, and Home Assistant integration options for smart HVAC applications.

OWON also provides OEM/ODM manufacturing and customization services for system integrators, smart building solution providers, and HVAC equipment distributors.