SONOFF Dongle-LMG21 Dongle Lite MG21, Zigbee 3.0 and Thread USB adapter with reliable local control for Home Assistant, Zigbee2MQTT, and smart home systems

Introducing the SONOFF Dongle Lite MG21, an affordable and compact Zigbee 3.0 & Thread USB Dongle designed for smart home enthusiasts. This entry-level dongle is one of the smallest Zigbee USB coordinators available, making it ideal for users looking to build or expand their smart home network without occupying too much space. It utilizes the reliable Silicon Labs EFR32MG21 chip, the same proven technology found in other popular SONOFF dongles, ensuring stable and dependable Zigbee performance. Simply plug it into your Raspberry Pi, NUC, NAS, or mini PC to instantly establish a Zigbee network, compatible with popular platforms like Home Assistant using ZHA or Zigbee2MQTT.

The SONOFF Dongle Lite MG21 boasts several key features for a seamless user experience. Its compact design is 65% smaller than its predecessor, the ZBDongle-E, preventing it from blocking adjacent USB ports. For enhanced signal stability and to mitigate potential interference from USB 3.0 devices, a 0.5-meter USB extension cable is included, allowing you to position the dongle optimally. A standout feature is the browser-based SONOFF Dongle Flasher, which enables easy firmware updates and allows you to switch between ZigBee coordinator, ZigBee router, OpenThread RCP, and MultiPAN RCP firmware without needing extra software or technical expertise. This flexibility allows you to adapt the dongle for various roles, including acting as a Zigbee repeater for extended network range or as a Thread Border Router when flashed with OpenThread RCP firmware.

Key specifications for the SONOFF Dongle Lite MG21 include its Model: Dongle-LMG21, powered by the Silicon Labs EFR32MG21 chip, supporting Zigbee 3.0 and Thread (via firmware) protocols on the 2.4 GHz frequency. It features an external, 180° rotatable antenna offering a reach of up to 140 meters in unobstructed spaces. The USB interface is Type-A, and it comes with a 0.5-meter USB cable. The housing is constructed from durable PC + ABS, ultrasonically welded for a robust, screw-free seal, with dimensions of 133 × 18.6 × 10.1 mm. The operating temperature ranges from 10°C to 60°C, with humidity tolerance of 5% – 95% RH (non-condensing). Compatibility is excellent with Home Assistant (ZHA & Zigbee2MQTT), Zigbee2MQTT, openHAB, and ioBroker on various operating systems including Windows, Ubuntu, Raspberry Pi OS, and Docker. It is important to note that it is not compatible with Homey / Homey Pro. The package includes the Dongle Lite MG21 and a 0.5-meter USB extension cable.

This SONOFF dongle is designed for longevity and ease of use, featuring ultrasonically welded housing for a robust, screw-free design and supporting Over-The-Air (OTA) firmware updates wirelessly through your hub. It's the ideal choice for users seeking an affordable, reliable, and versatile Zigbee 3.0 and Thread solution. Whether you're setting up a new smart home network with Home Assistant or expanding an existing one, the Dongle Lite MG21 offers plug-and-play simplicity. For those needing to extend their network's reach, flashing a second Dongle Lite MG21 as a Zigbee router is a straightforward option. Its ability to be configured as a Thread Border Router via OpenThread RCP firmware also opens up possibilities for Matter integration, making it a future-proof addition to your smart home setup.