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Download the specific Hanwei datasheet for your MQ sensor (MQ-2, MQ-7, MQ-135) and print the sensitivity graph. Tape it to your workbench—you will reference it every time you calibrate your MH Flying Fish module.

Serial.print("Analog Voltage: "); Serial.print(sensorVoltage); Serial.print(" V

End of datasheet-style document.

Since the "Flying Fish" module utilizes a standard MQ sensor, you should look for the datasheet of the specific model printed on the metal can (e.g., MQ-2, MQ-3, MQ-5, MQ-7, MQ-135). Interpreting this datasheet is crucial for accurate readings. Here are the critical sections you need to understand:

In the world of DIY electronics, gas detection is a critical function for projects ranging from home air quality monitors to industrial safety systems. Among the myriad of available components, the , often branded with the logo or name "Flying Fish," stand out as the most popular choice for Arduino, Raspberry Pi, and ESP32 developers.