The SONOFF ZBDongle-E is a Zigbee 3.0 USB adapter designed to act as a universal smart home gateway and network coordinator for popular open smart home platforms. It is intended for users building or expanding Zigbee environments around Home Assistant, openHAB, Zigbee2MQTT, and similar ecosystems. With pre-flashed coordinator firmware, strong radio output, and a compact metal enclosure, it is built for stable everyday Zigbee network management.Based on the official SONOFF product page, the ZBDongle-E comes pre-flashed with EZNet 6.10.3 coordinator firmware and is powered by the EFR32MG21 chipset. SONOFF highlights +20dBm output gain for improved coverage and notes that the aluminum housing helps reduce electromagnetic interference from surrounding devices. The product page also references fast firmware switching via the SONOFF Dongle Flasher tool and support for Green Power devices under the right Zigbee channel configuration.Features Pre-flashed and ready to use: Ships with Zigbee coordinator firmware based on EZNet 6.10.3. Wide smart home compatibility: Officially positioned for Home Assistant, openHAB, Zigbee2MQTT, and more. EFR32MG21 chipset: Provides reliable Zigbee radio performance for coordinator use. +20dBm output gain: Designed to improve coverage and connection stability. Shielded aluminum housing: Helps reduce electromagnetic interference in crowded USB or hub environments. Firmware flexibility: Can be reflashed more quickly using SONOFF's Dongle Flasher tools. Green Power support: Supports Green Power devices, with channel guidance noted by SONOFF. Compact USB gateway form factor: Easy to integrate into home server, Raspberry Pi, mini PC, or automation controller setups. Specifications Parameter Value Product Name SONOFF Zigbee 3.0 USB Dongle Plus | ZBDongle-E Type Zigbee USB coordinator / smart gateway adapter Chipset EFR32MG21 Preloaded Firmware EZNet 6.10.3 coordinator firmware Zigbee Standard Zigbee 3.0 Output Gain +20dBm Housing Shielded aluminum housing Platform Compatibility Home Assistant, openHAB, Zigbee2MQTT, and more Special Support Green Power devices with supported channel settings Firmware Tools Supports SONOFF Dongle Flasher Web tool and add-on workflow Product Weight 38g Applications Zigbee coordinator for Home Assistant setups Zigbee2MQTT gateway deployments openHAB Zigbee network management USB-connected smart home hubs and mini PCs DIY smart home and local automation systems Hardware Highlights Coordinator-first design: Meant to serve as the central Zigbee radio interface for local smart home platforms. Signal-focused build: Strong transmit gain and metal shielding help with network reliability. Open ecosystem fit: Works well in community-driven home automation environments rather than closed vendor-only systems. Tooling support: SONOFF provides dedicated flashing tools for faster firmware changes and device-role switching. Usage Notes SONOFF notes that the ZBDongle-E supports Green Power devices. If adding Hue Zigbee Green Power devices, SONOFF specifies channels 11, 15, 20, or 25 for the application. Other firmware can be flashed using SONOFF's Dongle Flasher Web tool or add-on workflow. FAQWhat is the ZBDongle-E mainly used for?It is mainly used as a Zigbee coordinator or gateway adapter for smart home platforms such as Home Assistant, openHAB, and Zigbee2MQTT.Does it come ready to use?Yes. SONOFF states that it comes pre-flashed with coordinator firmware based on EZNet 6.10.3.What chipset does it use?It is built on the EFR32MG21 chipset.Why does the housing matter?The aluminum housing is intended to reduce electromagnetic interference from nearby devices and help preserve signal integrity.Can it be reflashed?Yes. SONOFF provides a Dongle Flasher Web tool and add-on option for faster firmware flashing and switching.Does it support Green Power devices?Yes, but SONOFF notes that certain channels should be used for specific Green Power device scenarios.Resources Official SONOFF product page - Product overview, compatibility, and flashing notes. SONOFF Dongle Flasher - Firmware flashing tool reference.
