ThirdReality Zigbee USB-C Dongle Review: A Rare USB-C Coordinator Held Back by Firmware and Compatibility Headaches
A budget Zigbee 3.0 coordinator with a native USB-C connector and good range, but one that many owners struggle to get working reliably with Home Assistant due to its Zigate/BLZ firmware.
The ThirdReality Zigbee USB-C Dongle stands out for one thing: a native USB-C connector, which makes it one of the few Zigbee coordinators that plugs straight into USB-C-only laptops and mini-PCs. When it works, owners report excellent range (sensors at 100 feet, through two floors or brick walls) and low-lag, cloud-free local control. The problem is that getting it working is where many owners struggle. The dongle ships with outdated firmware and relies on the deprecated, unmaintained Zigate driver or ThirdReality's proprietary BLZ firmware, neither of which is well supported in mainline Home Assistant integrations (ZHA and Zigbee2MQTT), with BLZ often requiring a Docker install and extra libraries. As a result, reviews are sharply mixed: some get it running plug-and-play, but many report that ZHA and Z2M will not work, that finding and flashing the correct firmware is difficult (especially on Linux and requiring a third-party flashing tool), that Home Assistant warns about the older radio hardware on setup, and that platform updates later broke a working setup. Several owners returned it or call it usable only if you are willing to tinker. If you specifically need USB-C and enjoy troubleshooting, it can work; most Home Assistant users will have an easier time with a standard USB-A coordinator.
- USB-C-only laptops or mini-PCs
- Tinkerers comfortable flashing firmware
- Budget Zigbee experiments
- Local, cloud-free Zigbee control (once configured)
Pros
- Rare native USB-C connector for USB-C-only laptops and mini-PCs
- Strong Zigbee range when working (up to 100 feet, through floors and walls)
- Fully local, cloud-free control once configured
- Inexpensive
- Plug-and-play for a subset of owners
Cons
- Ships with outdated firmware; many cannot get it working in ZHA or Zigbee2MQTT
- Relies on the deprecated Zigate driver or poorly supported proprietary BLZ firmware
- Flashing is difficult, especially on Linux, and needs a third-party tool
- Home Assistant warns about the older radio hardware on setup
- Platform updates have broken previously working setups
- USB-only, with no Ethernet or Wi-Fi
Who is the ThirdReality USB-C Dongle for?
This is a budget Zigbee 3.0 USB coordinator whose main distinction is a native USB-C connector, aimed at DIY smart home users, and especially at those with USB-C-only laptops or mini-PCs. It is meant to work as a Zigbee coordinator via Home Assistant's ZHA or Zigbee2MQTT, giving local, cloud-free control. It is USB-only, with no Ethernet or Wi-Fi. Realistically, it best suits people who specifically need USB-C, are comfortable flashing firmware and troubleshooting, and want a cheap Zigbee experiment. If you want a coordinator that just works out of the box with Home Assistant, read the caveats first, most owners point to a standard USB-A stick instead.
What works well
The headline feature is the native USB-C connector, which owners specifically sought out because it plugs directly into USB-C-only laptops and mini-PCs, something most Zigbee dongles cannot do. When it is running, the results can be very good: owners report strong Zigbee range, with sensors working at up to 100 feet and reaching through two floors or brick walls, and low-lag, fully local operation with no cloud dependency. A subset of buyers had a genuinely smooth experience, describing it as plug-and-play as a Zigbee hub for their Home Assistant server, quick to recognize ThirdReality sensors, and easy to install. It is also inexpensive. For those willing to do the setup work, it can end up working great with minimal lag once configured.
What to know before you buy
The big caveat, and the reason reviews are so mixed, is firmware and compatibility. The dongle ships with outdated firmware and depends on either the deprecated, unmaintained Zigate driver or ThirdReality's proprietary BLZ firmware, neither of which is well supported in mainline Home Assistant integrations. Many owners could not get it working in ZHA or Zigbee2MQTT at all, with Z2M timing out or the deprecated Zigate driver failing after platform updates broke a previously working setup. Making it work often requires flashing, and owners describe finding the correct firmware and a compatible flashing tool as difficult and unintuitive, especially on Linux, and some are uncomfortable installing a third-party flashing utility. The BLZ path frequently needs a Docker install with extra libraries, and even then some report crashes and unreliable automations. Home Assistant itself warns about the older radio hardware during setup. Several buyers returned the dongle or bought a Sonoff adapter that worked immediately, and even satisfied owners often needed custom software installs to get going. It is USB-only, with no Ethernet or Wi-Fi.
Is the ThirdReality USB-C Dongle worth it?
The ThirdReality Zigbee USB-C Dongle is worth it only in a narrow case: you specifically need a native USB-C Zigbee coordinator (for a USB-C-only laptop or mini-PC) and you are comfortable flashing firmware and troubleshooting driver compatibility. In that scenario it is cheap and, once configured, can deliver excellent range and reliable local control. For everyone else, the trade-offs are significant, outdated firmware, reliance on the deprecated Zigate driver or the poorly supported BLZ firmware, difficult flashing, Home Assistant warnings, and a real chance updates break it later, which is why so many owners struggle or return it. If you just want a coordinator that works out of the box with Home Assistant, a standard USB-A stick like a Sonoff dongle or an SLZB-06 will save you the headache.
Frequently asked questions
Why would I choose this over a Sonoff or SLZB dongle?
Mainly for its native USB-C connector, which lets it plug directly into USB-C-only laptops and mini-PCs, something most Zigbee coordinators cannot do. If you do not specifically need USB-C, most owners recommend a standard USB-A stick, which is far easier to get working with Home Assistant.
Does it work with Home Assistant out of the box?
For some owners yes, but for many no. It ships with outdated firmware and depends on the deprecated Zigate driver or the proprietary BLZ firmware, neither well supported in mainline ZHA or Zigbee2MQTT. A significant number of buyers could not get it working without flashing, and some could not get it working at all.
Do I have to flash the firmware?
Often, yes. To make it usable in Home Assistant many owners had to flash it, and they describe finding the correct firmware and a compatible flashing tool as difficult and unintuitive, especially on Linux. The BLZ firmware path frequently also requires a Docker install with extra libraries.
How is the range?
Range is a genuine strength when the dongle is working. Owners report Zigbee sensors functioning at up to 100 feet and reaching through two floors or brick walls, with low-lag, fully local operation once it is properly configured.
Is it reliable long term?
That is a concern. Because it relies on the deprecated Zigate driver or the still-maturing BLZ firmware, some owners found that platform updates to Zigbee2MQTT later broke a working setup, and others report crashes and unreliable automations on BLZ. If you value set-and-forget reliability, a better-supported coordinator is a safer choice.
