Nabu Casa
Nabu Casa Home Assistant Connect ZBT-2 – Zigbee Adapter
Nabu Casa Home Assistant Connect ZBT-2 – Zigbee Adapter
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Please note: Orders of the ZBT-2 ship on December 6.
The Nabu Casa Home Assistant Connect ZBT-2 is a robust Zigbee or Thread coordinator designed for seamless integration with Home Assistant. This device enables reliable Zigbee or Thread connectivity for your smart home, making it a top choice for enthusiasts and professionals seeking stability and performance.
Product Details
- Plug-and-Play: Works natively with Home Assistant. No drivers or firmware flashing required.
- Wide Compatibility: Supports a vast array of Zigbee devices, including sensors, switches, and bulbs from Hue, IKEA Trådfri, and more. Compatible with ZHA and Zigbee2MQTT.
- Range and Reliability: Enhanced radio design for strong, stable coverage throughout your home.
- Powerful Hardware: Built on the Silicon Labs EFR32MG21 SoC, supporting Zigbee 3.0 and Thread (Matter-ready).
- OTA Updates: Supports over-the-air firmware updates for Zigbee devices.
- USB-C Interface: Modern connectivity for new and legacy systems.
- Open Source: Developed by Nabu Casa, the creators of Home Assistant, with a focus on privacy and local control.
Use Cases
- Connect Zigbee sensors and devices to Home Assistant for automation and monitoring.
- Upgrade from older Zigbee coordinators for improved range and performance.
- Integrate with Thread/Matter devices as the standard evolves.
Open Source & Community Driven
Community support and documentation are available through the Home Assistant forums.
Specifications
Specifications
Dimensions & Weight
Device: 83 × 83 × 179 mm — 157 g
With box: 227 × 168 × 42 mm — 350 g
Material
Enclosure: Polycarbonate plastic
Colors: White and semi-transparent
Product Details
SoCs:
- Silicon Labs MG24
- ESP32-S3 (USB-serial bridge)
Power / Data: USB-C, 5 V DC, 500 mA
Supported Protocols: Zigbee 3.0, Thread
Antenna Characteristics
- Frequency range: 2400–2483.5 MHz
- Transmit power: 10 dBm (EU), 8 dBm (Rest of World)
- Antenna dimensions: 24 mm diameter, 164 mm height
- Peak gain: 4.16 dBi
- Radiation pattern: Omnidirectional
- Note: Building materials and placement affect wireless range.
Environmental Conditions
- Indoor use only
- Operating temperature: 0 °C to 65 °C (antenna −40 to +85 °C)
- Operating temperature: 32 °F to 149 °F
- Humidity: non-condensing
- Keep dry and avoid dusty environments
- Avoid direct sunlight and heat sources
In the Box
- Antenna + Base
- 1.5 m USB-C cable (USB 2.0/3.0)
- Quickstart guide
- Warranty & Safety Information
It is recommended to use a USB extension cable to avoid interference and maximize range.
Links & Downloads
Links & Downloads

About Nabu Casa
About Zigbee
One of Zigbee's cool features is its mesh networking, which lets devices relay signals to one another, extending communication range throughout your home. Each device serves as a node that helps improve reliability, especially in larger spaces where Wi-Fi might struggle. Adding devices to your Zigbee network is easy and doesn’t drain power, making it a great choice for smart home setups.
Zigbee works well with many devices and platforms like Home Assistant. Users can control their gadgets effortlessly with apps, voice commands, or automation routines, all while enjoying secure communication thanks to built-in encryption. As more brands embrace Zigbee, it has become a go-to for creating connected smart homes that make life easier.