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.