Air quality monitoring system based on STM32

In daily life, air quality has a great impact on human health. Based on the current demand for indoor air quality, an indoor air quality monitoring system is designed. The system can monitor PM2.5, formaldehyde and temperature and humidity values in the air. This design uses STM32F103C8T6 minimum system as the main control chip, through the temperature and humidity sensor DHT11, formaldehyde sensor ZE08-CH2O and particulate matter sensor GP2Y1014AU for data monitoring, 0.96 inch OLED display display data in real time. Through TTL to RS485 module and RS485 to USB communication with the host computer, convenient for users to understand the indoor air quality in real time.