The PMS7003 is a particle matter counter capable of detecting particulates in the range of 0.3 to 10 microns. This device uses a serial connection to send measurements to a connected device roughly once a second. Concentration measurements are provided for PM1.0 (0.3-1.0um), PM2.5 (1.0-2.5um), and PM10 (2.5-10.0um).
All of the data pins require a 3.3v TTL level, but power must be supplied to VCC at 5v, which is a requirement for proper operation of the built-in fan. It's best advised to use Softwareserial for the serial communication when used with arduino.
Download and install the PMS library from the repository [PMS_Library-1.1.0]. Copy the code from PMS7003_Basic and upload it in your UNO, and that's it. You can see the data flowing in your serial monitor.
- Installing an Arduino Library Guide - Basic information on how to install an Arduino library.