2025.11.2
Home Assistant Connect ZBT-2
New product! Stock may be limited, and please be patient while our distributors' product pages go live.
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Features Specs FAQ Docs
Buy now
Features Specs FAQ Docs Buy now

Home Assistant Connect Z B T -2

The easiest way to start with
Zigbee or Thread is now even
better.

Designed and built by
Nabu Casa Logo
Open Home Foundation Logo
The best just got better

Precisely engineered

Optimized antenna providing the best possible connection to Zigbee or Thread devices. Along with opening up a world of Matter devices.

Updated internals

An updated Zigbee and Thread chip gives it the highest performance available, while providing a rock-solid, stable network.

A close-up macro shot of a the Zigbee/Thread chip (MG24) on a black printed circuit board, illuminated by dramatic blue and pink lighting.

More responsive

A 4x improvement in adapter speed consistently improves device responsiveness.

ZBT-1
Bd 115200
ZBT-2
4x
Bd 460800
Faster

Second generation platform

After introducing ZWA-2, our Connect line continues to grow with the addition of the ZBT-2.

It may be smaller than its older brother, but it shares the same second generation design, delivering peak performance, an open platform, and a look that blends seamlessly into any home.

Home Assistant Green device
Zigbee or Thread made seamless

Built for Home Assistant

Designed by the team driving forward Home Assistant, ZHA, and Matter.js.

Plug and play

  • The easiest way to get started with Zigbee or Thread, thanks to our intuitive start-up wizard and one-click updates.
  • Seamlessly migrate your Zigbee or Thread network.
  • Start up a new network in mere minutes by dedicating your Connect ZBT-2 to either Zigbee or Thread.
Brought to you by Nabu Casa Logo

Every purchase supports the Open Home

Nabu Casa designs and builds official Home Assistant hardware. As a commercial partner of the Open Home Foundation, Nabu Casa contributes the majority of its profits to the foundation. This means every purchase supports the development of projects like Home Assistant and ESPHome.

Get the ultimate Zigbee or Thread experience for just

$49/€45*

Buy now

*Recommended MSRP. Prices differ between regions due to varying local market costs and conditions, and subject to individual retailers.

Take back your smart home

Cut the clutter

Directly connect the Zigbee, Matter or Thread devices you already have (including Hue, IKEA Trådfri, and more!) to Home Assistant.

Choose what’s best for your home

Connect ZBT-2 gives you the flexibility to run either a Zigbee or Thread network. Even though you need to select one, both technologies give devices a local connection, longer battery life, and reduces the strain on your home Wi-Fi.

Thread
Zigbee

Thread has a big future

Thread is the latest smart home communication technology, allowing you to directly connect a wide range of Matter devices.

Matter logo Home Assistant is Matter certified.

Zigbee has the devices

Tried and tested, with the biggest selection of devices of any standard, many from established brands.

Open design

Built to be tinkered with

Unlocked, open source, and easy to open. No clips or glue, with accessible pads and pins.

The Home Assistant Connect ZBT-2 device on a wooden desk, placed next to a laptop and a Home Assistant Green.
A wide lifestyle shot of a room, with the Home Assistant Connect ZBT-2 device next to a Home Assistant ZWA-2 on a black side table against a green paneled wall.
A wide lifestyle shot of a room, with the Home Assistant Connect ZBT-2 device next to a Home Assistant ZWA-2 on a black side table against a green paneled wall.

Designed for the home

From its injection-molded case, to its sleek lines, it's designed to blend into home decor.

The Home Assistant Connect ZBT-2 device placed next to a stack of books on a black side table, next to a large green houseplant.

Specifications

Dimensions and weight

Device
83x83x179 mm
157 g
With box
227x168x42 mm
350 g

Material

Enclosure
Polycarbonate plastic
Colors
White and semi-transparent

Dimensions and weight

Device
83x83x179 mm
157 g
With box
227x168x42 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, 500mA
Supported protocols
Zigbee 3.0, Thread
Antenna characteristics
Different building materials and placement of the unit will affect the wireless connectivity range.
Frequency range: 2400-2483.5 MHz
Transmit power: 10 dBm (Europe)
8 dBm (rest of world)
Antenna dimensions: 24 mm diameter, 164mm height
Peak gain: 4.16 dBi
Radiation pattern: Omnidirectional
Environmental conditions for operation
Indoor use only
0 °C to 65 °C (antenna -40 to +85 °C)
32 °F to 149 °F
Humidity: non-condensing
Keep in dry, not excessively dusty environment as this can cause damage to the unit
Do not leave the unit in direct sunlight or near any heat source, as this can cause overheating.
In the box
Antenna + Base
1.5m USB-C cable (USB 2.0/3.0)
Quickstart guide
Warranty and Safety Information

Got some questions?

Connect ZBT-1 (formerly known as SkyConnect) was our first Zigbee/Thread adapter released in 2022. It is now discontinued and has been replaced with Connect ZBT-2. Connect ZBT-2 is a step up in capability compared to our previous adapter, providing peak performance and all packaged in a sleek, open design. Here is a short comparison between the two generations of devices.

Connect ZBT-1 (First-generation Connect platform)Connect ZBT-2 (Second-generation Connect platform)
AntennaSmall and internalHighly optimized antenna and base
TransmitMaximized for the protocolMaximized for the protocol
Speed (Baudrate)115200460800 - consistently improves device responsiveness
Zigbee/Thread ChipSilicon Labs MG21Silicon Labs MG24 - faster operation and sensitivity for weak signals
USB chipSilicon Labs CP2102N - great for USBESP32-S3 - great for USB and expandable
Ease of moddingHard to open, easy to flash firmwareEasy to open (no clips or glue, exposed pins and pads) and easy to flash firmware
Yes, Connect ZBT-2 is being used by many people with Zigbee2MQTT, and they are seeing great results. There is documentation to help support migrating to a new adapter, like Connect ZBT-2, on Zigbee2MQTT.
Connect ZBT-2 cannot do both Zigbee and Thread simultaneously. This technology is often called “multiprotocol” or “MultiPAN”. Though it is theoretically possible with the hardware within Connect ZBT-2, in our experience, this functionality doesn’t work well, and we don’t plan to implement it. We previously thoroughly tested multiprotocol with our Connect ZBT-1 adapter and found its operation to be inconsistent, often causing device stability issues. We do not believe multiprotocol is suitable for operation in the home, and strongly recommend dedicating a device to each protocol.
Yes, we’ve put together easy migration wizards for both Zigbee and Thread, which help migrate the vast majority of adapters. Some adapters require extra steps before migrating to Connect ZBT-2 (for example, Conbee sticks require a specific firmware to facilitate the migration). Please visit our documentation for specific instructions on how to migrate your adapter.
Though PoE is a cool technology, we have focused this product on simplicity and peak performance. PoE has become easier to use and offers performance levels that make its convenience an appealing trade-off for many users, but it didn’t fit Connect ZBT-2’s design goals. PoE is something we continue to explore; in fact, we recently produced experimental firmware for our Connect ZWA-2 adapter to operate over PoE. We currently do not have plans to make a specific version of Connect ZBT-2 with built-in PoE, but we will look at other ways to have it work with PoE.
If it is a Zigbee-certified device or Matter-certified device that uses Thread, it should work out of the box with Home Assistant. Home Assistant offers some of the strongest device compatibility of any smart home ecosystem. Some newer devices may require some configuration by our community, so it is best to check our community for device compatibility.
Yes, Home Assistant is officially Matter certified, and always works to support the latest versions, giving it great device compatibility. Some Matter devices use Wi-Fi, while others may use Thread (specifically battery-powered devices), and that’s when Connect ZBT-2 steps in to help you connect Matter devices. If you’re looking to add Matter devices that use Thread, follow our instructions to dedicate your device to Thread.
No, at the moment Connect ZBT-2 does not have this capability. This is technically possible, and we’ll explore enabling this, but there is no guarantee that this will happen.
No, this capability is not built into Connect ZBT-2. There are several technical hurdles that would make this complex to implement, and more research is needed to see if this is possible.
The size is all about physics, and what’s needed to optimize its ability to transmit and receive the radio frequencies used by Zigbee and Thread (2.4 GHz). Both the antenna and base are the optimal size to maximize the adapter’s performance.
We’re reviewing the Zigbee 4.0 spec now, and we believe it should be possible to update Connect ZBT-2 to support this version. It would require the Zigbee firmware in Connect ZBT-2 to be updated, along with Home Assistant gaining support.