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SLZB-MR1U is the next-generation smart home LAN adapter from SMLIGHT.
It builds on the solid foundation of SLZB-MR1, adding USB passthrough over Ethernet — making it the first fully modular smart home coordinator on the market.
Use it for Zigbee, Thread, + Z-Wave, or any USB-based protocol — all from a single, compact, Ethernet-connected device (see "USB passthrough" section for usage config).
✅ Key Features
Zigbee 3.0 support via Texas Instruments CC2652P (also could work in Thread Border Router mode)
Thread Border Router capability via EFR32MG21 (also could work in Zigbee mode).
USB Passthrough over TCP/IP — connect and access USB devices over the network (e.g., Z-Wave dongles). (see "USB passthrough" section for usage config).
Wi-Fi and Bluetooth built-in (ESP32)
Modular architecture — connect any USB device via port or USB hub (see "USB passthrough" section for usage config)
LAN + PoE support for stable power and network
Fully compatible with:
Zigbee2MQTT
Home Assistant
OpenThread
Z-Wave JS (via USB stick) or other protocol
Plug-and-play, SLZB-OS powered
What Makes MR1U Unique?
Unlike typical LAN coordinators, SLZB-MR1U includes a USB host interface that allows you to:
Connect USB dongle (e.g., Z-Wave, Matter, BLE, custom RF, etc.)
Access that USB device over Ethernet using TCP/IP passthrough
Use a USB hub to run multiple devices simultaneously (e.g., Zigbee + Thread + Z-Wave + ) (see "USB passthrough" section for usage config).
Expand your smart home setup without changing hardware
Ideal for power users, integrators, and future-proof installations.
Connectivity Options
Ethernet (with PoE) — stable & wired
Wi-Fi — for flexible placement
USB-C — alternative power input
USB-A host port — for radio/module expandability (see "USB passthrough" section for usage config).
One of the most powerful features of SLZB-MR1U is its USB passthrough capability over TCP/IP. This allows you to connect external USB devices — such as Z-Wave sticks, additional Zigbee coordinators, or custom UART-based modules — and access them over Ethernet just like they were locally plugged into your PC or smart home server.
✅ Compatible USB-to-UART chipsets:
CP210x (Silicon Labs)
PL2303 (Prolific)
CH340 / CH341 (WCH)
CH9102 (WCH, newer alternative to CH340)
These are the most commonly used chipsets in USB Zigbee, Z-Wave, or Thread dongles — making MR1U compatible with virtually all modern USB-based smart home radios.
Use Case Example:
Plug a Z-Wave USB stick into the MR1U, and connect it from Home Assistant usingtcp://192.168.1.100:6638– no local USB ports needed!
⚠️ Power Considerations
Some USB devices (especially high-powered dongles or hubs) may require external power to function reliably.
If you're connecting:
- Power-hungry radios like Z-Wave long-range sticks
Or USB sticks with internal LEDs or extra features
We recommend using a powered USB hub to ensure stable operation.
⚠️ Can I power the device using both PoE and USB-C at the same time?
A: ❌ No — never power the SLZB-MR1U with both PoE and USB-C simultaneously.
Unlike the SLZB-MR1, the SLZB-MR1U features a direct internal connection between PoE power and the USB port. This design enables USB passthrough to function correctly when powered via PoE — delivering power to connected USB devices.
If you add USB-C power while PoE is already active, you risk damaging the board due to conflicting power sources.
Use only one power method at a time:
PoE (if available),
or USB-C (when PoE is not available).
Protect your hardware — never combine both
Q: Wait… I can actually connect a USB Z-Wave stick to this and use it over Ethernet?
A: ✅ Yes — just plug the stick into the MR1U, and connect to it using tcp://<device_ip>:8638 from Z-Wave JS or Home Assistant. No drivers, no tricks. It works.
Q: Will it work with my Zigbee dongle based on CH340 or CP2102?
A: ✅ Absolutely. The MR1U supports the most common USB-UART chipsets: CH340/CH341, CP210x, PL2303, CH9102.
Q: Can I use more than one USB device at the same time?
A: ❌ Not now.
Q: I don’t have PoE. Can I still use Ethernet mode if I power the device via USB-C?
A: ✅ Yes — absolutely!
You can run the SLZB-MR1U in Ethernet mode while powering it through USB-C.
Here’s how to do it right:
Use a powered USB hub — plug your USB stick (e.g., Z-Wave) into the hub, and also connect a power supply to the hub’s power input.
Then plug the hub into the MR1U’s USB port. Ethernet stays active — no PoE needed.
Q: Is this just some sort of trick or tunneling workaround?
A: ✅ No tricks. The passthrough is native. The USB device becomes available over TCP just like with ser2net or USBIP, but embedded directly into the SLZB-MR1U hardware.
Q: Will I need to install anything special on the USB device?
A: ✅ No. The MR1U presents the device exactly as-is. If it works over USB on your PC, it’ll work over the network with MR1U.
Q: Do I need to configure anything to make this work?
A: ✅ Very little — simply enable USB passthrough in the web interface, and connect using the exposed IP:Port. That’s it.
Q: Can I flash devices like Z-Wave via this USB port?
A: ✅ Technically yes — but flashing over TCP is more sensitive to timing. For production or critical flashing, we still recommend direct USB.
Q: What happens if my USB stick draws too much power?
A: ✅ Use a powered USB hub. MR1U provides limited current via USB - high-power devices (like long-range Z-Wave sticks) may need external power.
Q: ⚠️ Can I power the device using both PoE and USB-C at the same time?
A: ❌ No — never power the SLZB-MR1U with both PoE and USB-C simultaneously.
Unlike the SLZB-MR1, the SLZB-MR1U features a direct internal connection between PoE power and the USB port. This design enables USB passthrough to function correctly when powered via PoE — delivering power to connected USB devices.
If you add USB-C power while PoE is already active, you risk damaging the board due to conflicting power sources.
Use only one power method at a time:
PoE (if available),
or USB-C (when PoE is not available).
Protect your hardware — never combine both
Technical Specifications – SLZB-MR1U
Radio Chips:
- Texas Instruments CC2652P7
- Zigbee 3.0 support (Zigbee2MQTT & ZHA compatible).
- Thread (Matter-over-Thread) support (Open Thread Border Router) .
- Ideal for Zigbee networks, works perfect also with Thread networks.
- +20 dBm TX power with built-in PA.
- 144kB+8kB RAM, 704kB Flash.
- Silicon Labs EFR32MG21
- Zigbee 3.0 support (Zigbee2MQTT & ZHA compatible).
- Thread (Matter-over-Thread) support (Open Thread Border Router).
- Ideal for Thread networks, works perfect also with Zigbee networks.
- +20 dBm TX power.
- 96 KB RAM, 1024 KB Flash.
Supported Protocols:
- Zigbee 3.0 (Zigbee2MQTT, ZHA), at the same time with Thread.
- Thread (Matter-over-Thread), at the same time with Zigbee.
- Supports simultaneous or switchable operation for multiradio environments.
- Wi-Fi.
- Other protocols based on External USB sticks.
Connectivity:
- USB-C for data and power
- Ethernet connection
- USB-C passthrough
Firmware:
- Radio firmware support
- Compatible with TI Z-Stack (for CC2652P7)
- Compatible with SL Ember/EZSP stack (for EFR32MG21).
- Radio firmware Updating via web-interface
- SLZB-OS
- Compatible with SLZB-OS versions 2.9.7 and up).
- SLZB-OS supported functionality:
- VPN, 20+ languages, Scripts support, Network settings, Security, Dashboard, zHub mode, mode switcher, OTA firmware updates etc.
Antenna:
- Dual external antenna SMA female connectors (one for each radio SoC)
- PCB antenna for Wi-Fi and Bluetooth.
- 2x pre-packed high-gain 2.4 GHz antennas included
Power Supply:
- PoE powered, POE 48V supported
- Powered via USB-C (5V DC)
- Low power consumption up to 1.5W (if both radio SoCs are running)
- !!! CANNOT be powered by Type-C and PoE at the same time. CAUTION!
Enclosure:
- Compact, durable ABS case with ventilation
- DIN rail and wall-mount compatible (3D models)
- Easy sticking with two-sided adhesive tapes
- Easy mounting with screws with screw set (screws, screw driver, ruler) included.
LED Indicators and peripheral:
- Independent status LEDs for each radio (6 service LEDs in total: 2 LEDs for Core SoC, 2 LEDs for CC2652P SoC, 2 LEDs for EFR32 SoC,)
- Multibutton: supports many functions (mode switch, reset etc).
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