FAQ about MEMS Gas Sensor - MiCS-5524【SEN0440】

Q1: SEN0440 is powered by UNO 5V. However, the detected results for alcohol and CO are both showing 0 ppm.

A1: Firstly, let's check if there are any poor connections in the circuit. We suggest using the code and connection method provided in the tutorial. The sensor needs to be preheated for a while before use. If the output still shows 0, it's possible that there is no alcohol or CO present in the surrounding environment, or the concentration is very low. You can try placing a volatile alcohol swab and the sensor in the same bag to test it. After preheating, you can set the CALIBRATION TIME to 0 so that you don't have to wait for 3 minutes each time.

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