In this video, I show you how to set up the SMLight SLB MR3U, a dual‑radio smart‑home controller that lets Zigbee and Matter over Thread work together seamlessly inside Home Assistant.
We unbox the SMLight MR3U, power it up, find it on the network, configure both radios, and integrate it with Zigbee2MQTT and the Thread Border Router add‑on. I also walk through pairing a Zigbee temperature sensor and a Matter smart plug — and demonstrate both protocols talking to Home Assistant at the same time.
If you’re building a modern smart home and want Zigbee reliability and Matter compatibility in one device, this guide will get you fully set up.
📌 What’s inside:
• Full SMLight SLB MR3U setup walkthrough
• How Zigbee + Matter over Thread work together
• Finding the SMLight MR3U on your network
• Configuring Zigbee2MQTT with the new controller
• Installing and configuring the Thread Border Router
• Pairing Zigbee sensors and Matter devices
• Verifying everything in Home Assistant
• Troubleshooting pairing and USB passthrough in Proxmox If this helped,
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