[REQUEST] Support for Sonoff TH Sensor Si7021 (Humidity and Temperature) sensor for indoors

[Hedda]

Request support for Sonoff TH Sensor Si7021 (Humidity and Temperature) indoor sensor that comes with 2.5mm jack and cable

https://sonoff.tech/product/accessories/Si7021

https://www.itead.cc/wiki/Sonoff_Sensor_Si7021

https://www.itead.cc/wiki/File:Sonoff_Si7021_Sensor_Schematic.pdf

https://www.silabs.com/documents/public/data-sheets/Si7021-A20.pdf

Sonoff TH Sensor Si7021 is designed for convenient replacement sold as an official option for Sonoff TH10 and Sonoff TH16

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

https://www.itead.cc/wiki/Sonoff_TH_10/16

https://tasmota.github.io/docs/devices/Sonoff-TH/

Sensors for Sonoff TH series comes with a standard 2.5mm jack (Stereo + Mic Audio Connector) which has been repurposed:

Pin	Name	Description
1	VCC	Power supply 2.2~3.6VDC
2	GND	GND
3	NC	NC
4	DATA	Single bus, data port

https://www.itead.cc/wiki/File:Si7021_audio_connector.jpg