Is the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) worth it?
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) is worth considering with a 7.1/10 consensus score. 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
Expert consensus
How we scoreKey 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 ecosystem support.
| Product | Price | Consensus | Works With | Verdict |
|---|---|---|---|---|
| SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)This page | $24.90 | 7.1/10 | — | Good Value |
| SONOFF Zigbee 3.0 USB Dongle Plus MG24 (Thread & Zigbee) | $35.90 | 8.9/10 | — | Must Buy |
| SMLIGHT SLZB-06M Zigbee 3.0 Ethernet/USB/WiFi PoE Coordinator | $72.99 | 8.5/10 | — | Recommended |
| SONOFF Zigbee 3.0 USB Dongle Plus-E (ZBDongle-E) | $26.99 | 7.6/10 | — | Good Value |
The SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21) ($24.90 list) earns a 7.1/10 expert consensus, versus the Aqara Hub M3 at $149.99 list (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
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 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 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.
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 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, experts rate it "Good Value" with a 7.1/10 consensus score.
Decided on the SONOFF Zigbee 3.0 & Thread Dongle Lite (EFR32MG21)?
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Sources & Methodology
Consensus score based on available data. See how we build consensus scores.
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you.This is a consensus review — 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.