[REQUEST] uPyEasy firmware on the Sonoff Zigbee Bridge (Sonoff ZBBridge)

[Hedda]

Please consider porting uPyEasy to the new Sonoff Zigbee Bridge (Sonoff ZBBridge)

https://www.itead.cc/sonoff-zbbridge.html

Itead has just launched Sonoff ZBBridge as an inexpensive Sonoff Zigbee Bridge which is based on a similar design as the Sonoff RF Bridge 433 (which several ESP8266 firmware already has support for).

https://www.cnx-software.com/2020/04/16/sonoff-zbbridge-wifi-to-zigbee-gateway/

According to the teardown on notenoughtech.com it sounds as if it is based on Silicon Labs EFR32MG21 (EFR32 Mighty Gecko) for Zigbee 3.0 radio module support and ESP8266 (ESP8266EX) for WiFi and bridge/gateway/controller software

https://notenoughtech.com/home-automation/sonoff/sonoff-zigbee-bridge-preview/

From the images it even looks like they are reusing the same injection moulds as for the Sonoff RF Bridge 433 housing/enclosure

https://sonoff.tech/product/accessories/433-rf-bridge

https://www.itead.cc/sonoff-rf-bridge-433.html

https://www.itead.cc/wiki/Sonoff_RF_Bridge_433

Tasmota does something similar with Zigbee2Tasmota but by connecting an ESP8266 to a Texas Instrument CC2530 module instead however it too is using a serial communication protocol, see:

https://tasmota.github.io/docs/Zigbee/

EZSP (EmberZNet Serial Protocol) interface that Silicon Labs uses is also well documented and already used by open source projects, see example Home Assistant's ZHA integration component via zigpy and bellows:

https://github.com/zigpy/bellows

https://www.home-assistant.io/integrations/zha/

https://www.silabs.com/community/wireless/zigbee-and-thread/knowledge-base.entry.html/2017/05/25/build_an_ezsp-spiho-2VE8

https://www.silabs.com/documents/public/user-guides/ug100-ezsp-reference-guide.pdf