Application of simple single-chip microcomputer intelligent alarm system in greenhouse

Starting with the demand of greenhouse gas detection, this article designs the harmful gas detection and alarm system based on 51 single-chip microcomputers. The hardware circuit takes STC89C52 as the control core, MQ-7 gas detector as the sensor, and ADC0809 is the digital-to-analog conversion chip, supplemented by power supply module, display module, button module, short message module, memory module, etc. Realize the concentration display of harmful gas in the greenhouse, and give the alarm when it exceeds the standard. At the same time, the GSM module can also send short messages to the mobile phone, playing the role of remote prompt.