Review on 🌡️ Comimark High Precision Transmitter 1Pcs SHT20 Temperature Humidity Sensor Modbus RS485 by Carl Mayes

There is absolutely NO DOCUMENTATION for this part. Luckily I found a similar device at Revain with wire color codes: RED=+5V; BLACK = GENERAL; VC=RS485 A+; WHT=RS485 B-. The default address is 1; Baud rate 9600. To find the registers required for communication, search the internet for "SHT20 MODBUS commands". I found a device on banggood.com that should use the same chipset and have the same registers. So I finally figured out how to use it and now I'm reading the temperature (in tenths of a degree Celsius) and relative humidity (in tenths of a degree). %) The readings 276, 432 are therefore 27.6 °C at 43.2 % relative humidity. Seller, you need to add some documentation for that!