If the carbon dioxide sensor is deployed in the battery powered terminal node, it does not meet the requirements of low power consumption<br>seek<br>Design principles. Considering the fluidity of the air, a wide range of carbon dioxide concentrations can be considered equal. Therefore, in the design process, the use of<br>CO2 sensor<br>The router is deployed on the router node with normal power supply. Ccs811 sensor is a kind of sensor with analog signal output, and its output voltage range is<br>265-326mv<br>The CO2 concentration should be 350-10000ppm.<br>Through the back-end amplifier circuit, its voltage output range is 0-2v, through the built-in AD converter (analog-to-digital conversion) of ccs811, up to 12 bit analog-to-digital converter can be realized<br>Digital converter<br>
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