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Small USB stick with external antenna in silver aluminium housing

GCROWN

GCROWN 3.0 USB Dongle Plus-E Gateway 20dBm

SKU CH-WAVJ-CMX43

A 3.0 USB dongle pre-flashed with EZNet 6.10.3 coordinator firmware for Home Assistant, openHAB and 2MQTT, using an EFR32MG21 chip with +20dBm output gain in an aluminium housing

  • TypeUSB Wi-FI Adapter
  • Ready for Home Assistant out of the box with EZNet 6.10.3 firmware
  • Strong 20dBm output gain extends wireless range
  • Aluminium housing reduces signal interference from peripherals
  • Powered by EFR32MG21 chip for reliable performance
  • USB 3.0 interface ensures broad compatibility

Universal USB Gateway for Smart Home Hubs

This USB 3.0 dongle acts as a coordinator for Zigbee and Thread networks. It arrives pre-flashed with EZNet 6.10.3 firmware and works with Home Assistant, openHAB and Zigbee2MQTT without extra setup. The EFR32MG21 chip provides the radio base.

Sustained Operation with Aluminium Shielding

The aluminium housing reduces interference from adjacent peripherals during continuous traffic. A +20dBm output gain extends reliable range across larger homes. Stable coordinator performance is maintained over long uptime periods.

Upgrade from Lower-Power or Unshielded Sticks

Replaces basic USB coordinators that lack external antennas or shielding. The jump is worth it when devices drop off at distance or when USB 3.0 neighbours cause packet loss. Not for users needing Bluetooth-only or proprietary single-vendor ecosystems.

Highlights

  • Ready for Home Assistant out of the box with EZNet 6.10.3 firmware
  • Strong 20dBm output gain extends wireless range
  • Aluminium housing reduces signal interference from peripherals
  • Powered by EFR32MG21 chip for reliable performance
  • USB 3.0 interface ensures broad compatibility

Specifications

TypeUSB Wi-FI Adapter

Questions about this item

How much heat or power draw does the +20dBm EFR32MG21 radio create during continuous operation?

The EFR32MG21 chip is a low-power SoC; the aluminum housing passively dissipates the modest heat from the +20dBm radio without a fan.

Which host port must my machine provide for this USB 3.0 dongle to enumerate correctly?

A standard USB-A 3.0 or 2.0 port supplies both data and the 5 V power the adapter needs.

Will the pre-flashed EZNet 6.10.3 coordinator firmware talk to my older Zigbee 3.0 sensors and bulbs?

Yes, the coordinator firmware implements the Zigbee 3.0 stack so it pairs with existing 3.0 end devices.

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