目前市面上的空气质量检测仪通常只能检测少数几种气体，面对空气中多种有害气体，就要使用不同的检测仪 器。针对现有检测系统功能不全等问题，开发了由STM32单片机、各类传感器、LCD显示屏和WiFi通信模块组成的多功能检 测系统，并利用机智云传输数据到用户终端。该检测系统能够实现对空气中的CO、CO2、PM2.5、TVOC、甲醛的含量以及温 湿度进行实时监测，并具有超标报警功能。

At present, the air quality detectors on the market can usually only detect a few kinds of gases. In the face of multiple harmful gases in the air, different detection instruments must be used. In response to the incomplete functions of the existing detection system, a multi-function detection system composed of STM32 MCU, various sensors, LCD display and WIFI communication module has been developed, and Gizwits is used to transmit data to the user terminal. The detection system can realize real-time monitoring of the content of CO, CO2, PM2.5, TVOC, formaldehyde, and temperature and humidity in the air, and has an alarm function for exceeding the standard.