Elevate your smart-home setup with the ZBT-2 USB Adapter, the next-generation way to connect your Zigbee or Thread / Matter devices directly to Home Assistant. Featuring a precisely tuned high-gain antenna and a powerful Silicon Labs MG24 + ESP32-S3 chip combo, the ZBT-2 delivers up to 4× faster responsiveness and rock-solid stability.
Plug-and-play with an intuitive setup wizard and seamless migration from older adapters — choose to dedicate the ZBT-2 to either Zigbee 3.0 or Thread. The open, second-generation design makes it easy to tinker: no glue, accessible pads, and open-source firmware.
Built with Home Assistant in mind, this adapter supports major integrations like ZHA, Zigbee2MQTT, and OpenThread. Every purchase supports the development of the Open Home Foundation.
$89.00
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The Home Assistant Connect ZBT-2 is a USB-connected Zigbee 3.0 or Thread/Matter adapter, designed specifically to integrate with Home Assistant as your smart-home communications hub. It enables you to build either a Zigbee or Thread network via your Home Assistant system, allowing for robust local device integration — without relying on cloud-only hubs. support.nabucasa.com+1
It features a second-generation platform: upgraded internals (including a high-performance Zigbee/Thread radio and optimized antenna), an open-hardware design (easy to open, no glue or hidden clips), and improved responsiveness over previous generation models. Home Assistant+1
High performance & responsiveness — The ZBT-2 boasts approximately 4× faster communication than its predecessor, improving device responsiveness and reliability. Home Assistant
Choose your protocol — You can dedicate the device to either Zigbee 3.0 or Thread (Matter), depending on your device ecosystem. Note: it does not run both protocols simultaneously. Home Assistant+1
Wide compatibility — Works with major Home Assistant integrations: ZHA (Zigbee Home Automation), Thread via OpenThread, and can be used with alternative stacks like Zigbee2MQTT. support.nabucasa.com+1
Local-first smart home — By connecting Zigbee or Thread devices directly to Home Assistant via this adapter, you reduce reliance on WiFi and cloud services, improving privacy, speed and reliability. Home Assistant
Tinker-friendly design — The ZBT-2 is built with accessible pads, no glue or hidden circuitry, making it ideal for hobbyists or those who like hardware flexibility. Home Assistant+1
Supports Matter/Thread future-proofing — With Thread support built-in, the adapter is ready for the growing ecosystem of Matter devices. Home Assistant
Supported protocols: Zigbee 3.0 or Thread (you select one during setup)
System on Chips (SoCs):
Silicon Labs MG24 (manages Zigbee or Thread radio)
ESP32-S3 (USB-serial bridge)
Connection & power: USB-C, 5 V DC, up to approx. 500 mA
Antenna:
Frequency: 2.4 GHz (2400–2483.5 MHz)
Peak gain: ~4.16 dBi
Radiation pattern: omnidirectional
Dimensions & weight:
Device: 83 × 83 × 179 mm, weight ~157 g
With box: 227 × 168 × 42 mm, ~350 g
Enclosure: Polycarbonate plastic, white & semi-transparent finish
Operating environment: Indoor use only; 0 °C to 65 °C (antenna: –40 °C to +85 °C); non-condensing humidity.
In the box: Antenna + base, 1.5 m USB-C cable (USB 2.0/3.0), Quickstart guide, Warranty & Safety information.
This adapter is not a standalone smart-home hub. It must be used with a running Home Assistant instance (for example via a Home Assistant Green or another supported host).
You cannot operate both Zigbee and Thread simultaneously on the same adapter—it must be set for one or the other for optimal reliability.
It does not support Bluetooth or Z-Wave protocols.
If you are migrating from an older adapter (such as the ZBT-1), Home Assistant provides migration wizards and documentation to make the process smoother.
Because of the physical size of the antenna and base (designed for optimized range and reliability), the adapter is relatively larger than simpler USB sticks—this is deliberate and for performance.
Smart-home enthusiasts looking to centralize and localize their Zigbee or Thread/Matter devices under Home Assistant.
Users upgrading from legacy Zigbee controllers who want improved range, stability, and responsiveness.
DIYers or tinkerers who appreciate open-hardware design, modding possibilities, and full access to underlying components.
Homes with many battery-powered or Thread-capable devices (ready for the Matter future).
The Home Assistant Connect ZBT-2 stands out as a premium adapter for the serious smart-home integrator. With blazing improved responsiveness, open-design hardware, and flexible support for both Zigbee and Thread (Matter), it’s built to let your Home Assistant system act as the local hub of your connected-home universe. Whether you’re building a new network or migrating from an older adapter, the Connect ZBT-2 brings reliability, performance and future proofing together in a slick package.
Overview
| Brand |
Home Assistant |
|---|
General
| Weight | 0.35 kg |
|---|---|
| Dimensions | 227 × 168 × 42 cm |
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