The MMD3005 gas sensor module is a gas sensor module developed based on the smart sensor independently developed by Huiwen Technology. It can be used to simultaneously identify and detect the composition and content of ammonia, TVOC and hydrogen sulfide in the air. The sensor module has both temperature and humidity detection function. The sensor of the MMD3005 series module is a multi-channel gas sensor composed of different material systems. It uses specific conditioning circuits and precise algorithms to convert the response to conductivity changes into electrical signals corresponding to gas types and concentrations.
Here, I have interfaced this sensor with ESP32
