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SLZB-MR3U Zigbee and Thread Adapter

Build a More Flexible Smart Home Network Without Being Tied to Your Server

Connect and manage modern smart home devices with the SMLIGHT SLZB-MR3U Zigbee and Thread Adapter, a dual-radio coordinator designed for flexible Zigbee and Thread network installations.

✔ Dual Zigbee + Thread Radio Support
✔ CC2674P10 + EFR32MG24 Chipset
✔ Zigbee2MQTT, ZHA & OpenThread Support
✔ LAN, USB & Wi-Fi Connectivity
✔ PoE Support for Flexible Installation
✔ ESP32-S3 With USB-to-TCP/IP Functionality
✔ Up to 400 Zigbee Devices per Adapter

Built for Home Assistant users, smart home enthusiasts, installers, and advanced automation setups that need reliable connectivity and greater freedom over coordinator placement.

One Coordinator for Modern Smart Home Networks

Managing a growing smart home can become complicated when different devices rely on different wireless technologies.

The SMLIGHT SLZB-MR3U combines dedicated Zigbee and Thread radio hardware in one compact adapter, allowing you to work with both technologies without relying on a single-protocol setup.

Its CC2674P10 and EFR32MG24 chips provide the radio hardware for Zigbee and Thread, while the upgraded ESP32-S3 adds direct USB functionality and USB-to-TCP/IP bridging.

Connect the adapter through LAN, Wi-Fi or USB, position it where it makes sense for your network, and integrate it with platforms such as Zigbee2MQTT, ZHA, OpenThread and Home Assistant.

Whether you're expanding an existing Zigbee network or exploring Thread and Matter-compatible smart home technologies, the SLZB-MR3U gives you a flexible foundation for your setup.

Why Choose the SMLIGHT SLZB-MR3U?

Choosing a Zigbee and Thread coordinator is about more than simply connecting devices. The way the adapter connects, where it can be installed, how it integrates with your software, and how easily it can be maintained all matter.

The SLZB-MR3U combines:

Dual-radio Zigbee and Thread support for multi-protocol smart home installations

CC2674P10 + EFR32MG24 chipsets for dedicated wireless connectivity

ESP32-S3 with direct USB support for additional network functionality

LAN, Wi-Fi and USB connectivity for flexible coordinator placement

PoE support for compatible installations requiring convenient network-powered deployment

Up to 400 Zigbee devices per adapter for larger Zigbee installations

LAN-based firmware flashing for easier Zigbee and ESP firmware management

Every feature is designed to give smart home users more flexibility when building, expanding, and maintaining their automation network.

Why SLZB-MR3U Compared to a Standard USB Zigbee Adapter

Feature	SMLIGHT SLZB-MR3U	Standard USB Zigbee Adapter
Wireless Support	Zigbee + Thread	Typically Zigbee only
Connectivity	LAN, Wi-Fi & USB	Primarily USB
Coordinator Location	Flexible network placement	Usually near server
Power Options	PoE, USB options	USB-powered
USB-to-TCP/IP	Yes, via ESP32-S3	Not typically available
Zigbee Capacity	Up to 400 devices	Depends on adapter
Firmware Management	LAN-based flashing	Typically local
Home Automation	Zigbee2MQTT, ZHA & more	Depends on model

The Difference You Notice in a Flexible Installation

Run Zigbee and Thread Together

The SLZB-MR3U uses two radio chips to support Zigbee and Thread simultaneously, making it suitable for smart homes using more than one wireless protocol.

Position Your Coordinator Where It Works Best

With LAN and Wi-Fi connectivity, the adapter does not have to remain beside your Home Assistant server. Place the coordinator strategically within your network infrastructure.

Expand Your Zigbee Network

Each SLZB-MR3U can connect up to 400 Zigbee devices, providing substantial capacity for larger smart home installations.

Share Compatible USB Devices Over LAN

The upgraded ESP32-S3 supports USB-to-TCP/IP functionality. This can allow compatible USB devices, such as a Z-Wave dongle, to be shared through your LAN.

Explore Thread and Matter

Experimental support for Matter and Thread gives advanced users an opportunity to explore newer smart home connectivity technologies alongside established Zigbee setups.

Simplify Firmware Management

Flash the Zigbee and ESP firmware directly through the LAN connection, making ongoing firmware management more convenient.

Premium Features

Feature	Benefit
Dual Zigbee + Thread Radios	Supports both wireless technologies simultaneously
CC2674P10 + EFR32MG24	Dedicated radio hardware for Zigbee and Thread
ESP32-S3	Provides upgraded processing and direct USB functionality
LAN Connectivity	Enables flexible network-based coordinator placement
Wi-Fi Connectivity	Provides an additional wireless connection option
USB-to-TCP/IP	Allows compatible USB devices to be shared over LAN
PoE Support	Simplifies compatible network installations
Up to 400 Zigbee Devices	Supports larger Zigbee networks
LAN Firmware Flashing	Makes firmware updates easier to manage
Experimental Matter & Thread Support	Allows users to explore newer smart home technologies

How to Use the SLZB-MR3U

Using the SLZB-MR3U Zigbee and Thread Adapter is straightforward:

Connect the adapter using LAN, Wi-Fi or USB according to your installation requirements.
Power the device using a compatible power option, including PoE where supported.
Position the coordinator in a suitable location for your smart home network.
Configure your software using a compatible platform such as Zigbee2MQTT, ZHA or OpenThread.
Pair your compatible devices with the appropriate Zigbee or Thread network.
Manage firmware through the LAN connection when updates are required.

Who Is It For?

The SMLIGHT SLZB-MR3U is ideal for:

Home Assistant users
Zigbee2MQTT users
ZHA users
Smart home enthusiasts
DIY home automation users
Advanced Zigbee installations
Thread and Matter users exploring newer technologies
Smart home installers
Users managing larger Zigbee networks
Anyone who wants flexible coordinator placement

If your smart home is growing beyond a simple collection of devices and you need greater flexibility between Zigbee, Thread, LAN, USB and Wi-Fi, the SLZB-MR3U is designed for that type of installation.

Australian SMLIGHT Distribution & Local Support

The SLZB-MR3U is supplied by Dialed In, an official Australian distributor of SMLIGHT products.

Enjoy the benefit of fast Australian delivery and local support when purchasing your SMLIGHT smart home hardware.

Built for Flexible Smart Home Expansion

The SLZB-MR3U is designed around the practical needs of modern smart home users.

Its combination of dual Zigbee and Thread radio support, LAN/Wi-Fi/USB connectivity, PoE capability, ESP32-S3 USB-to-TCP/IP functionality and compatibility with open automation platforms makes it a flexible choice for building and expanding a connected home.

Specifications

Specification	Details
Product	SMLIGHT SLZB-MR3U
Radio Support	Zigbee + Thread
Zigbee Chip	CC2674P10
Thread Chip	EFR32MG24
Processor	ESP32-S3
Connectivity	LAN, Wi-Fi & USB
USB Function	USB-to-TCP/IP
Zigbee Capacity	Up to 400 devices
Zigbee Software	Zigbee2MQTT, ZHA
Thread Software	OpenThread
Smart Home Platform	Home Assistant and compatible platforms
Power	PoE and USB options
Firmware	Zigbee and ESP firmware flashable over LAN
Matter	Experimental support
Included Accessories	Antenna, screws, screw helper, adhesive tapes, micro-USB to Type-C adapter

Frequently Asked Questions

Can the SLZB-MR3U run Zigbee and Thread simultaneously?

Yes. The SLZB-MR3U uses separate radio chips for Zigbee and Thread, allowing both technologies to be supported simultaneously.

Is the SLZB-MR3U compatible with Home Assistant?

Yes. The adapter is designed to work with open smart home platforms such as Home Assistant, using compatible software including Zigbee2MQTT and ZHA.

Does it support Zigbee2MQTT and ZHA?

Yes. The SLZB-MR3U is designed to work with both Zigbee2MQTT and ZHA, giving users flexibility when choosing their Zigbee software.

Can I connect the SLZB-MR3U through LAN?

Yes. LAN connectivity allows the adapter to communicate with your smart home system over your network and provides greater freedom over where the coordinator is positioned.

How many Zigbee devices can it support?

Each SLZB-MR3U can connect up to 400 Zigbee devices, depending on the network configuration and installation.

Does it support Thread and Matter?

The SLZB-MR3U provides experimental support for Matter and Thread, making it suitable for users exploring these technologies.

Can the USB connection be shared over the network?

Yes. The ESP32-S3 provides USB-to-TCP/IP functionality, allowing compatible USB devices to be shared over a LAN connection.

Can the firmware be updated over LAN?

Yes. Both the Zigbee and ESP firmware can be flashed directly over the LAN connection.

Build a More Flexible Smart Home Network

Whether you're expanding a Home Assistant installation, building a larger Zigbee network, adding Thread devices, or experimenting with Matter, the SMLIGHT SLZB-MR3U Zigbee and Thread Adapter gives you the connectivity and installation flexibility to build around your requirements.

With dual-radio support, flexible LAN/Wi-Fi/USB connectivity, PoE capability, ESP32-S3 functionality, support for up to 400 Zigbee devices, and compatibility with leading open smart home platforms, the SLZB-MR3U is built for users who want more control over their smart home network.

Upgrade your smart home infrastructure with the SMLIGHT SLZB-MR3U and create a more flexible foundation for the devices and technologies you use today and explore tomorrow.