"Greenhouse Effect" is melting the iceberg every minute,. By knowing the exact concentration of CO2, we can do somehing to reduce the CO2 and to protect our earth. For that reason, a HQ CO2 sensor is designed by DFRobot eningeer . This is the first CO2 sensor in OSHW market. The output voltage of the module falls as the concentration of the CO2 increases. The potentiometer onboard is designed to set the threshold of voltage. As long as the CO2 concentration is high enough (voltage is lower than threshold), a digital signal (ON/OFF) will be released.
Notice:The new version of analog sensor port pin mapping has been changed as the following two features.Please check the tips for changing sensor cable pin mapping while using the I/O Expansion shield. We will continue to update. For the inconvenience caused, please understand.