Frequently Asked Questions
Everything you need to know about purchasing, warranty and our devices.
Everything you need to know about purchasing, warranty and our devices.
€47.00
Home Assistant Connect ZBT-2 is the official second-generation Zigbee and Thread adapter designed by Nabu Casa — the team behind Home Assistant. It was built to solve wireless interference issues common with older "stick" style USB adapters. The ZBT-2 features a stunning standalone base and a highly optimized antenna. It represents a significant upgrade in speed, range, and reliability for your local smart home network.
Key Features
Standalone antenna design: No more hiding a small USB stick behind a noisy computer. The ZBT-2 uses a large, fully tuned antenna on a dedicated base that acts as a ground plane to improve signal performance. It connects via a 1.5-meter USB cable, allowing you to position it optimally away from electronic interference.
4x faster communication: By upgrading the internal USB-to-serial baud rate from 115,200 bps to 460,800 bps, the adapter handles massive data packets with ease. You will notice a significant improvement in responsiveness when simultaneously triggering light groups or complex automations.
Next-generation Silicon Labs chip: Powered by the advanced MG24 system-on-chip (SoC), it provides substantially more processing power and sensitivity to weak signals from distant sensors compared to previous generations.
Plug-and-Play migration: Built exclusively for Home Assistant, it includes an intuitive onboarding wizard that allows you to start a brand new network or seamlessly migrate an existing Zigbee or Thread network in just a few clicks.
Maker-friendly and open-source: The beautiful polycarbonate enclosure is assembled without glue or hidden plastic clips. It is designed to be easily opened, revealing internal headers and pins for hardware enthusiasts who wish to install custom firmware.
Technical Specifications
| Feature | Specification |
| Radio Chip (SoC) | Silicon Labs MG24 (Zigbee 3.0 and Thread) |
| USB-to-Serial Bridge | Espressif ESP32-S3 |
| Supported Protocols | Zigbee 3.0, Thread (Matter over Thread ready) |
| Platform Compatibility | ZHA (Zigbee Home Automation), Zigbee2MQTT, OpenThread Border Router |
| Frequency Range | 2400–2483.5 MHz |
| Transmit Power | 10 dBm (Europe) / 8 dBm (Rest of the world) |
| Antenna Gain | 4.16 dBi (Omnidirectional radiation pattern) |
| Connection Type | USB-C (5V DC, 500 mA) via 1.5 m extension cable |
| Baud Rate | 460,800 bps |
| Dimensions (device) | 83 mm × 83 mm × 179 mm |
| Weight | 157 g |
| Enclosure Material | White and translucent polycarbonate plastic |
Package Contents
Home Assistant Connect ZBT-2 Antenna
ZBT-2 Base
1.5 m USB-A to USB-C cable
Quick Start Guide
Warranty and Safety Information
If you'd like to know anything before buying – delivery, availability, technical specifications or the actual condition of the device – we're happy to help. Contact us also if you need larger quantities or are looking for a smart home device that isn't in our catalog.
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