Home Assistant Connect ZBT-2 – Powerful Zigbee & Thread USB adapter with MG24 chip
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Usually ready in 2-4 days
Shipping information
Shipping information
Orders placed on weekdays before 4:00 PM and in stock will be shipped the same day . In most cases, your order will be delivered the next day. More details can be found in our shipping policy .
Description
Description
Home Assistant Connect ZBT-2: The Ultimate Zigbee & Thread USB Adapter
Do you want to connect your sensors, smart lights, and switches directly and locally to Home Assistant without the need for external bridges? The Home Assistant Connect ZBT-2 (the official successor to the Home Assistant SkyConnect) is currently the most powerful Zigbee 3.0 and Thread USB adapter. Thanks to its impressive external antenna and the latest MG24 chip, you'll enjoy unparalleled range and a lightning-fast smart home network.
What makes the Connect ZBT-2 unique?
- Unprecedented range thanks to the external antenna: Where the old ZBT-1 (SkyConnect) had a small internal antenna, the ZBT-2 features a large external antenna (+4.16 dBi) with a "ground plane" at its base. This makes the adapter much more sensitive to weak signals from sensors located far away or behind thick walls.
- Future-proof Silicon Labs MG24 chip: The modern successor to the MG21 offers significantly more processing power and memory. Combined with a 4x higher communication speed (baud rate of 460,800 bps), your network responds noticeably faster, which you'll particularly notice when switching large groups of devices simultaneously.
- Ready for the future with Thread & Matter: The adapter supports both reliable Zigbee 3.0 and the brand new Thread protocol (for Matter devices). Please note: you can only run one protocol at a time on the dongle.
- Plug-and-play with Home Assistant: Connect the adapter to your Home Assistant Green, Yellow, or Raspberry Pi, and the hub will recognize it immediately. Works seamlessly with ZHA (Zigbee Home Automation), Zigbee2MQTT, and OpenThread Border Router.
ZBT-1 (SkyConnect) vs. ZBT-2: What's the difference?
Do you currently have the first-generation SkyConnect (ZBT-1) and are you considering an upgrade? The ZBT-2 solves the biggest challenges of its predecessor:
- Large External Antenna: While the ZBT-1 had a small internal antenna, the ZBT-2 features a substantial, omnidirectional external antenna (164 mm) with a special "ground plane" at its base for maximum transmission power and range.
- Faster and more stable network: Thanks to the MG24 chip, the network responds much faster, and mesh stability in larger homes with thick walls has been significantly improved.
- Easy migration: Upgrading is a breeze. With Home Assistant's built-in migration tools, you can transfer your existing network (even from deCONZ or other sticks) in just a few clicks without having to re-pair all your devices.
Technical Specifications
| Brand | Nabu Casa (Home Assistant) |
| Chipset | Silicon Labs MG24 (Zigbee/Thread) & ESP32-S3 (USB-bridge) |
| Wireless protocols | Zigbee 3.0 or Thread (Matter) - one protocol at a time |
| Baud rate | 460,800 bps (4x faster than ZBT-1) |
| Transmit power & Gain | 10 dBm transmit power | 4.16 dBi peak gain (external antenna) |
| Connection & Power | USB-C (5V DC, 500 mA) via included 1.5m USB-C to USB-A cable |
| Housing | White polycarbonate with semi-transparent accents (easy to open for modding) |
| Dimensions | 83 x 83 x 179 mm (including base and antenna) | Weight: 157 grams |
| Operating temperature | 0 °C to 65 °C (for indoor use only) |
Package contents
- 1x Home Assistant Connect ZBT-2 (Base + External Antenna)
- 1x USB-C to USB-A cable (1.5 meters)
- 1x Quick Start Guide (English)
Frequently Asked Questions
Does the Connect ZBT-2 work with Home Assistant Green or Yellow?
Yes, the adapter works via USB with almost any Home Assistant installation. Whether you use a Home Assistant Green, Yellow, Raspberry Pi, or your own server with HAOS. Just make sure you are running Home Assistant version 2025.10.1 or newer.
Can I use Zigbee and Thread simultaneously on one adapter?
No, the ZBT-2 supports one protocol at a time for the most stable connection. If you want to set up both a Zigbee network and a Thread network, we recommend using two separate adapters (for example, via a USB hub).
How many devices can I connect directly?
The powerful MG24 chip supports up to 32 direct connections (End Devices such as battery-powered sensors). For larger networks, simply add Zigbee routers (such as smart plugs connected to mains power) to expand your network indefinitely.
What do the LED lights on the base mean?
The status LED provides immediate feedback about your network. A pulsating LED means the adapter is waiting for a connection. If the LED is off, everything is correctly connected. If the LED starts flashing rapidly, the antenna is not mounted completely vertically; place it upright for the best range.
How does firmware updating work?
Completely automatically! As soon as a new update is available for the Zigbee or Thread firmware, Home Assistant will notify you directly in your dashboard. You can update the adapter with a single click, without having to install complex software on a computer.
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Specifications
Specifications
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Smart home controller
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USB
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Power supply
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