SMLIGHT SLZB-06U is a modular, multi-protocol LAN + USB gateway that combines central management of Zigbee 3.0 and Thread (Matter over Thread) networks in a single device. The high-gain external antenna and next-generation radio chip (TI CC2652P) ensure a stable, long-range mesh network. Ethernet (PoE), Wi-Fi and USB-C connectivity allow flexible installation.

The "U" edition is an improved version of the SLZB-06: it adds hardware process control to the radio SoC, the RJ45 LEDs can be controlled from software, and the USB mode allows the radio to appear as a separate USB serial device. Furthermore, the USB-passthrough (USB-over-IP) function is supported, so that USB radios (e.g. ZWA-2) can also be used over a network.

An ideal choice for future-proof, cloud-independent installations based on Home Assistant, Zigbee2MQTT and OpenThread, where flexible integration with the Matter ecosystem is important.

Main product features

- Multi-protocol gateway: Zigbee 3.0 coordinator + Thread Border Router in one, with Matter-over-Thread support.
- Extra functions of the "U" edition: HW flow control for both radios; software control of RJ45 LEDs; In USB mode, two separate USB serial ports (CC and EFR radio separately).
- USB-passthrough (USB-over-IP): transmission of USB devices (e.g. Z-Wave stick) via Ethernet as a remote serial port.
- Powerful radio hardware: CC2652P7, +20 dBm TX power, external SMA antenna for long range.
- Flexible connection: Ethernet (PoE 48 V), Wi-Fi, USB-C power supply; compact, ventilated, installable housing.
- SLZB-OS firmware: web interface, VPN, multilingual UI, zHub mode, scripts, OTA updates.

Smart home protocols and platform compatibility

- Supported protocols: Zigbee 3.0 (Zigbee2MQTT, ZHA), Thread (Matter over Thread).
- Simultaneous operation: Zigbee and Thread in parallel or switchable mode, for a multi-radio environment.
- Compatibility: Home Assistant (ZHA, Zigbee2MQTT, OpenThread Border Router), integration with Matter platforms via Thread.
- Network access: Ethernet (PoE), Wi-Fi; USB passthrough for remote USB serial use.

Smart functions

- USB-over-IP: sharing USB radios (e.g. Z-Wave) over IP, as if it were a local USB.
- Web interface: radios, mode switching, network settings, control of LEDs, firmware update.
- Advanced diagnostics: separate status LEDs per radio; HW flow control ensures stable frame transmission (Prevents buffer overflow: if the receiving party cannot read fast enough, it "requests a break" with CTS/RTS signals, so no frames are lost (Zigbee/Thread packets)).
- USB dual CDC: when connected to a computer, two USB serial ports appear (separate for CC and EFR).

Technical specifications

- Model: SLZB-06U
- Radio SoCs: Texas Instruments CC2652P (+20 dBm TX, 144 kB + 8 kB RAM, 704 kB Flash),
- Supported stacks: TI Z-Stack (CC2652P),
- Protocols: Zigbee 3.0; Thread (Matter-over-Thread); parallel/switch mode for multiple radios
- Connections: Ethernet (RJ45), PoE 48 V support; Wi-Fi; USB-C data and power; USB-C passthrough
- USB functions: USB-passthrough (USB-over-IP); Dual USB serial ports (CC & EFR) connected to a PC
- Firmware: SLZB-OS (2.9.7 or later); web update; VPN, 20+ languages, scripts, zHub mode, OTA
- LEDs: independent radio status LEDs; RJ45 LED can be switched on/off (U version)
- Power consumption: low consumption, ≤ 1.5 W (both radios active)
- Power supply: PoE 48 V or USB-C 5 V DC (cannot be used simultaneously)
- Housing: compact, ventilated ABS; DIN rail and wall mounting supported (3D models)
- Peripherals: multi-button (mode change, reset); dedicated LEDs: 2× Core SoC, 2× CC2652P,
- Note: USB passthrough and parallel Zigbee/Thread operation depend on the SLZB-OS setting; use only one power source at a time