Design of intelligent ventilation system based on MCU

An intelligent ventilation system with STM32F407ZGT6 as the main control system is designed. The data are collected by DHT11 temperature and humidity sensor, MQ-135 air quality sensor and MQ-2 detection combustible gas sensor, and sent to single-chip microcomputer for processing and analysis. The results are sent to the TFT-LCD liquid crystal display system for real-time display, and when the temperature and environmental quality exceed the standard, the actuator is turned on to deal with alarm, exhaust and humidification. In addition, the start and stop of the actuator can be controlled separately by the key switch.