6. Radios & Protocols

SMHUB integrates multiple radios to support a broad range of smart home and IoT protocols, making it a true multi-radio coordinator and Matter bridge.

6.1 Zigbee

• Chipset: TI CC26xx series.

• Port: /dev/ttyS1
• Baudrate: 115200
• RTS/CTS: false

• Protocol: Zigbee 3.0 and legacy devices.

• Software: Zigbee2MQTT (Z2M).

• Integration:

  • Pairs and manages Zigbee devices directly.

  • Publishes states/events via the preinstalled Mosquitto MQTT broker.

  • Compatible with Home Assistant, OpenHAB, Node-RED, and other MQTT platforms.

• Coordinator Mode: Can operate as a standalone Zigbee coordinator, without additional servers.

6.2 Thread

• Chipset: Silicon Labs EFR32MG series.

• Port: /dev/ttyS2
• Baudrate: 115200
• RTS/CTS: false
  

• Protocol: Thread 1.1/1.2.

• Integration:

  • Acts as an OpenThread Border Router (OTBR).

  • Works with Matterbridge, exposing Thread/Zigbee devices into Matter.

• Use Cases:

  • Bridging Zigbee sensors to Matter.

  • Running mixed Zigbee + Thread networks.

6.3 Z-Wave

• Radio Module: EFR32ZG23 expansion module.

• Port: /dev/ttyS3
• Baudrate: 115200
• RTS/CTS: false

• Protocol: Z-Wave 700/800 series, including Z-Wave Long Range (LR).

• Software: Managed via Z-Wave JS (installable).

• Integration:

  • Local Z-Wave or Z-Wave LR networks.

  • Automation via Node-RED and MQTT.

• Hardware: Dedicated LED and reset/flash pins for diagnostics and firmware updates.

6.4 4G/LTE (in development)

• Module: SIM7672G LTE modem.

• Port: /dev/ttyS4
• Baudrate: 115200
• RTS/CTS: false

• Capabilities:

  • LTE Cat 1 connectivity.

  • Interfaces: USB, debug UART.

  • Antenna connectors for LTE and GNSS.

  • SIM slot with SIM detection.

• Status: Hardware fully integrated, software support is in active development.

• Planned Functions:

  • LTE fallback connectivity.

  • Remote site deployments without Ethernet/Wi-Fi.
    

6.5 Wi-Fi

• Bands: Dual-band 2.4 GHz and 5 GHz.

• Modes: Access Point (AP) and Client.

• Use Cases:

  • 2.4 GHz: long range, high compatibility.

  • 5 GHz: higher bandwidth, reduced interference.

• Integration: Used for device connectivity and as a network backbone when Ethernet is not available.

6.6 Bluetooth

• Version: Bluetooth 5.0.

• Support: Bluetooth Low Energy (BLE).

6.7 Multi-Radio Operation

• Zigbee + Thread + Wi-Fi + Bluetooth operate simultaneously out of the box.

• Z-Wave and 4G/LTE are available via expansion modules.

• Hardware and firmware are designed to minimize interference and ensure stable concurrent radio operations.

6.8 Matter Bridge

SMHUB can function as a Matter bridge, allowing non-Matter devices to join modern ecosystems:

• Bridges Zigbee and Thread devices into Matter.

• Compatible with Google Home, Apple Home, Amazon Alexa, SmartThings.

• Entirely local bridging — no third-party cloud services required.