This is everyone's Arduino environmental sensor C602 project. It monitors fine dust and temperature and humidity using Arduino and Bluetooth, and you can check the real-time indoor air quality by creating a smartphone app with App Inventor.

Book: https://book.naver.com/bookdb/book_detail.nhn?bid=18030644
Naver Cafe: https://cafe.naver.com/arduinosensor/book5108749/66

------------------
[How to operate]
-------------------------------------------------- ----
Development environment: WINDOWS 10
Arduino IDE: 1.8.13
-------------------------------------------------- ----
01 library copy
The libraries\Steamedu123_Sensor-master folder can be copied to the folder below.

* Folder created automatically after installing Arduino
C:\Users\s\Documents\Arduino\libraries

02 *.ino file execution
-Arduino and PC connection
-Run Arduino IDE
-Menu → Tools → Board: Arduino UNO check
-Menu → Sketch → Confirm/Compile

03 Check compilation
04 Arduino Uno upload
05 Operation check