A popular air pollution home sensor Air Master AM7 Plus is a very handy device, which help you to measure and grab data with easy via internal UART/USB convertor data of air condition inside your house. You may control and record concentrations of PM2.5, PM10, HCHO (formaldehyde), TVOC (total volatile organic compounds), CO2, RH and temperature.
The components for record data are presented on picture below (protocol of receiving/sending data via UART port):
To receiving a data packet you need to send periodically a command
55 CD 47 00 00 00 00 00 00 01 69 0D 0A
via UART at (19200,8,n1)
A full package with instruction, protocol, drivers and control panel program you may find here-> https://pollutants.eu/programs/AirMasterAM7.zip
password is pollutants