ZB-GW03 eWeLink Ethernet Zigbee Gateway look to be a spiritual successor of ITead Sonoff ZBBridge.
It features an ESP32 chip and a wired Ethernet port (instead of the older ESP8266/ESP8285 and WiFi).
The good news it that it has hacked with Tasmota ZBBridge firmware (using same process as hacking Tead Sonoff ZBBridge) so can likley be used either with Tasmota32’s Zigbee2Tasmota (Z2T) to MQTT implementation or as a remote “Ember” Zigbee coordinator adapter with ZigBee Binding for OpenHAB.
Hacking information posted on blakadder’s Zigbee compatibility database here:
If you think of it as an ITead Sonoff ZBBridge clone with ESP32 and Ethernet then you should be able to follow these guides from digiblur → How to use the Sonoff Zigbee Bridge with Home Assistant - Tasmota and Zigbee2MQTT with the Sonoff Zigbee Bridge
Tasmota discussion here where they want feedback for unofficial build of Tasmota ZigbeeBridge on it:
Disclaimer! I don’t own a ZB-GW03 myself so I have not hacked it, but I collected this information so far:
ZB-GW03 v1.0 and ZB-GW03-V1.2 is apparently sold rebranded under many names, including EACHEN and SmartWise brands:
Looks like it used the exact same “SM-011 V1.0” module by CoolKit as ITead Sonoff ZBBridge uses:
Know that the “SM-011 V1.0” module by CoolKit is based on the great EFR32MG21 SoC by Silicon Labs (Silabs), but unfortunatly this specific “SM-011 V1.0” module by CoolKit (as well as the first Zigbee 3.0 USB Dongle by ITead which is likley also design by CoolKit engineers) are known for being very susceptible to electromagnetic interference due to lack of RF shielding, and a relatively poor antenna design that has not been properly tuned in hardware for that specific integrated PCB antenna.
Because of this, you want to make sure to keep this Zigbee gateway away from other electronic appliances, especially other devices with WiFi radios, or other sources of EMI (electromagnetic interference) such as live electrical wires, etc., as well as try to place it in an optimal location a little bit away from walls, ceilings and floors built with dense building materials.
As always try to as soon as possible to add at least a few mains-powered Zigbee devices closer to the Zigbee gateway than wireless Zigbee devices so that mains-powered Zigbee devices can act as Zigbee routers for wireless Zigbee end-devices.