# USB ZigBee dongle Sonoff Smart home Lite MG21 — USB MQTT gateway for ZigBee devices

**URL:** https://aio.lv/en/product--sonoff-sonoff-lmg21--11687046
**Data updated:** 2026-02-04 15:34 (EET)
**Category:** Other goods
**Manufacturer:** Sonoff
**Manufacturer code:** SONOFF-LMG21
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.15 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 21.61 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonoff-sonoff-lmg21--11687046

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Sonoff Smart home ZigBee dongle Lite MG21 is a compact USB device that provides a ZigBee-to-MQTT gateway for smart home setups. Plug into a host (PC, Raspberry Pi or compatible controller) to connect and manage ZigBee devices via MQTT. Designed for local integration, it enables device pairing, status monitoring and centralised control of ZigBee sensors and actuators.

## Long description

Sonoff Smart home ZigBee dongle Lite MG21 is a compact USB gateway that enables local Zigbee-to-MQTT integration for smart home systems. Plug the dongle into a host (PC, Raspberry Pi or compatible controller) to pair and manage Zigbee lights, switches and sensors without cloud latency. The device supports multiple firmware types and can operate as a coordinator or as a router to extend the Zigbee mesh.
Advantages
The dongle offers broad platform compatibility with Home Assistant (ZHA), Zigbee2MQTT, openHAB, ioBroker, Domoticz, Jeedom and HomeSeer. Local control ensures fast response times and no dependence on external cloud services. An external antenna with up to ≤180° rotation improves signal coverage in complex home layouts. Flexible firmware options allow flashing Zigbee NCP/Router, OpenThread RCP or MultiPAN firmware and switching device roles as needed, while automatic detection and straightforward pairing simplify setup.
Suitable for
Creating a stable Zigbee mesh for whole-home automation
Connecting and managing Zigbee lights, sensors and smart plugs via MQTT
Using as a coordinator to pair devices or reflashing as a router to extend range
Key specifications
Zigbee SoC: EFR32MG21
Interface: USB; compatible with Windows, Ubuntu, Raspberry Pi OS (Raspbian) and Docker hosts
Supported firmware: Zigbee NCP, Zigbee Router, OpenThread RCP, MultiPAN RCP and custom firmware
Power input: 5 V ⎓ 500 mA
Housing: PC + ABS with external antenna (rotation up to ≤180°)
Dimensions: 133 × 18.6 × 10.1 mm
Operating conditions: 10–60 °C; 5–95% RH
Compatibility: Zigbee 3.0 devices such as lights, switches and sensors
How to use
Plug the USB dongle into the host system and install the preferred integration or software. For Home Assistant (ZHA) add the ZHA integration and follow the on-screen instructions, then pair devices through ZHA → Devices. For Zigbee2MQTT install an MQTT broker and Zigbee2MQTT, configure the adapter type (for example ember) and the correct serial port, then start pairing. The device can be reflashed to change its role between coordinator and router according to network needs.
Usage recommendations
Place the dongle where the external antenna has clear line-of-sight to the main concentration of Zigbee devices, and avoid placing it near large metal objects or Wi‑Fi routers to reduce interference. Use local MQTT integration for minimal latency and reliable automation.

## FAQ

### How much does the USB ZigBee dongle Sonoff Lite MG21 cost, and is it available for purchase?

The price is 26.15 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Thursday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonoff products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonoff service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11687046/67037456_large.webp