SMLIGHT SLZB-MR3U Zigbee, Thread, Ethernet, PoE LAN, USB WiFi adapter (CC2674P10 + EFR32MG24)

The SMLIGHT SLZB-MR3U is a next-generation multi-radio smart home coordinator that integrates two powerful SoCs – Texas Instruments CC2674P10 and Silicon Labs EFR32MG24 – into a compact device, delivering full support for both Zigbee and Thread (including Matter-over-Thread) protocols simultaneously. For maximum flexibility, it seamlessly works with Zigbee2MQTT, ZHA, Matter ecosystems, and Home Assistant without vendor lock-in. This makes it an ideal choice for advanced home automation and open-source platform integration.

It comes preinstalled with the SLZB-OS operating system, ready to use out of the box, including a web interface, OTA updates, VPN, secure access, and automation features. Housed in a compact and durable ABS enclosure with ventilation openings and separate antenna connectors, it offers a modern and long-lasting solution.

The “U” edition is an upgraded version of the SLZB-MR3U: it adds hardware flow control for both radio SoCs, software-controllable RJ45 LEDs, and USB mode that exposes both radios as separate USB-serial devices. It also supports USB passthrough (USB-over-IP), enabling USB radios (e.g. ZWA-2) to be accessed over the network.

About SMLIGHT

The SMLIGHT MultiRadio series (MR1, MR2, MR3) was created to give smart home enthusiasts and developers native, vendor-independent access to Zigbee, Thread, Wi-Fi, and Bluetooth protocols within a single device. This open ecosystem approach ensures maximum interoperability, robust local control, and broad compatibility with platforms like Home Assistant and Zigbee2MQTT.

Key Product Features

• Dual-radio architecture – Equipped with CC2674P10 and EFR32MG24 chips, enabling simultaneous operation of Zigbee 3.0 and Thread (Matter-over-Thread).
• +20 dBm TX power – High transmission strength with built-in PA amplifiers for both radios.
• Multiple connectivity and mounting options – Supports Ethernet (with PoE), USB-C (power data), and Wi-Fi; durable ABS enclosure with wall/DIN rail/adhesive mounting support.
• OTA firmware updates and web dashboard – Both radios and SLZB-OS are updatable via browser; includes VPN, scripting, network settings, multilingual UI, LED indicators, and mode switch button.
• High-performance antenna system – Two external SMA antennas plus integrated PCB antenna deliver excellent signal strength and stability.
• Multi-protocol gateway: Zigbee 3.0 coordinator + Thread Border Router with Matter-over-Thread support.
• “U” edition extra features: HW flow control for both radios; software-controlled RJ45 LEDs; in USB mode, two separate USB-serial ports (one for each radio: CC and EFR).
• USB passthrough (USB-over-IP): Enables USB devices (e.g. Z-Wave sticks) to be shared over Ethernet as remote serial ports.

Smart Home Protocols Platform Compatibility

• Supported protocols – Zigbee 3.0, Thread (Matter-over-Thread), Wi-Fi, Bluetooth.
• Platform compatibility – Fully compatible with Zigbee2MQTT, ZHA, Home Assistant, and Matter-over-Thread ecosystems.
• Vendor-agnostic design – No ecosystem lock-in; free integration possibilities.
• Home Assistant integration – Supported natively in the SLZB integration from Home Assistant version 2025.06.

Smart Features

• Manage Zigbee and Thread networks (including Matter-over-Thread) from a single device with simultaneous or switchable mode.
• Remote OTA updates and management via web dashboard – no physical access required.
• Secure administration with VPN support and encrypted communication options.
• Multiple LED indicators and mode switch button for real-time feedback and control.
• USB-over-IP: Share USB radios (e.g. Z-Wave) over IP as if they were locally connected.
• Advanced diagnostics: Separate status LEDs for each radio; HW flow control ensures stable frame transmission (prevents buffer overflows—if the receiver can’t keep up, CTS/RTS signals request a pause, avoiding data loss in Zigbee/Thread packets).
• USB dual CDC: When connected to a computer, two USB-serial ports appear—one for the CC radio, one for the EFR radio.

Electrical Hardware Specifications

• Power input – 48 V PoE (802.3af) or 5 V USB-C.
• Power consumption – max approx. 1.5 W with both radios active.
• Enclosure – Compact ABS case with ventilation openings; supports wall, DIN rail, or adhesive mounting.
• Indicators controls – Six status LEDs and one multifunction button for mode switching/reset.

Additional Features

• Compact and future-proof design suitable for both DIY users and professionals preparing for Matter-based systems.
• Ships with a complete installation kit (antennas and mounting accessories included for quick setup).
• Outstanding performance and network coverage – ideal for large homes or multi-building setups.

SLZB-MR2 vs SLZB-MR3U – Quick Comparison