Is the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) worth it?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) ($24.90) is worth considering with a 7.1/10 consensus score across 2 expert reviews. Experts highlight $24.90 — the cheapest entry here and the obvious second radio and flashable to either zigbee or thread for the two-dongle architecture. Best for: Cheapest dedicated Thread RCP second radio for the two-dongle architecture HA recommends.
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SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)
Zigbee/Thread Coordinator
SmartHomeExplorer proprietary rating
2 expert sources
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) earns a SHE Score of 6.4/10, driven by strong value (9.6/10) with room to improve in compatibility breadth (5/10). Based on 2 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 7.1/10 across 2 sources
Updated this weekKey Features
- ✓ EFR32MG21 radio, Zigbee 3.0 + Thread (flashable)
- ✓ Compact USB stick with extension cable
- ✓ Flashable to either Zigbee or Thread
- ✓ Works with Home Assistant and Zigbee2MQTT
Best For
SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) vs. the alternatives
How the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) stacks up against other Automation options on price, expert consensus, and our proprietary SHE Score.
| Product | Price | Consensus | SHE Score | Works With | Verdict |
|---|---|---|---|---|---|
| SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)This page | $24.90 | 7.1/10 | 6.4/10 | major smart home platforms | Good Value |
| SONOFF Zigbee 3.0 USB Dongle Plus MG24 (Thread & Zigbee) | $35.90 | 8.9/10 | 7.1/10 | major smart home platforms | Must Buy |
| SMLIGHT SLZB-06M Zigbee 3.0 Ethernet/USB/WiFi PoE Coordinator | $72.99 | 8.5/10 | 6.8/10 | major smart home platforms | Recommended |
| SONOFF Zigbee 3.0 USB Dongle Plus-E (ZBDongle-E) | $26.99 | 7.6/10 | 6.6/10 | major smart home platforms | Good Value |
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) ($24.90) earns a 7.1/10 expert consensus and a 6.4/10 SHE Score across 2 sources, versus the Aqara Hub M3 at $119.99 (8.3/10 consensus).
What Experts Agree On
What Experts Love
- ✓ $24.90 — the cheapest entry here and the obvious second radio
- ✓ Flashable to either Zigbee or Thread for the two-dongle architecture
- ✓ EFR32MG21 is actively-developed Silabs silicon
- ✓ Ships with an extension cable to escape USB3 interference
Common Criticisms
- ✗ Compact antenna gives the lowest reach in this roundup
- ✗ No web management UI like the SMLIGHT sticks
- ✗ No published large-network claim — sized as a second radio
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Ready to buy the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)?
Check Price on Amazon$24.90 · 2 expert sources · 7.1/10 consensus
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Frequently Asked Questions
Is the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) worth it?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) earns a 7.1/10 consensus score across 2 expert sources and is rated "Good Value". At $24.90, it is best for Cheapest dedicated Thread RCP second radio for the two-dongle architecture HA recommends. it ranks among the top picks in its category.
How much does the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) cost?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) is priced at $24.90. With a 7.1/10 score from 2 expert reviews and a "Good Value" rating, that price represents a premium ask relative to the ~7.5/10 average for Automation products. Prices shift often, so check the live figure before buying.
Who is the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) best for?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) is best for Cheapest dedicated Thread RCP second radio for the two-dongle architecture HA recommends. Experts rate it "Good Value" with a 7.1/10 consensus across 2 sources.
How does the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) compare to other Automation options?
Among the Automation products we have aggregated, the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) ranks below average with a 7.1/10 score. See our full category comparison for head-to-head details.
What smart home systems does the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) work with?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) works with major smart home platforms. Check the compatibility notes above for any hub dependencies or setup requirements before you buy.
What are the best alternatives to the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)?
If the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) ($24.90, 7.1/10) is not the right fit, the closest alternatives in Automation are Aqara Hub M3, Amazon Smart Plug. Compare them on price, ecosystem support, and expert consensus to find your match.
What are the pros and cons of the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)?
The main strengths of the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) are $24.90 — the cheapest entry here and the obvious second radio and flashable to either zigbee or thread for the two-dongle architecture. The most-cited downside is compact antenna gives the lowest reach in this roundup. Overall, 2 expert sources rate it "Good Value" with a 7.1/10 consensus score.
Sources & Methodology
Consensus score based on available data. See how we build consensus scores and the SHE Score methodology.
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 2 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.
Independence notice: Smart Home Explorer is an independent publication. SONOFF and other product names, logos, and brands referenced on this page are the property of their respective owners and are used for identification purposes only. This review is not sponsored by, affiliated with, or endorsed by SONOFF or any other manufacturer named in this article.