: Usually VCC (5V), GND, Digital Output (D0), and Analog Output (A0).
Each MQ sensor is "tuned" for specific gases. Common versions found in the Flying Fish lineup include: MQ-2 Semiconductor Sensor for Combustible Gas - Pololu mh mq sensor flying fish
void setup() Serial.begin(9600); for (int i=0; i<3; i++) baseline[i] = analogRead(mqPins[i]); delay(100); : Usually VCC (5V), GND, Digital Output (D0),
delay(100);
The MH MQ Sensor "Flying Fish" refers to a popular series of gas and environmental sensor modules often used in DIY electronics and Arduino projects. "Flying Fish" is a brand or series designation commonly found on the PCB of these modules, often alongside the "MH" (likely a manufacturer prefix) label. Raspberry Pi Forums +2 Overview of MQ Sensors The MQ series consists of metal-oxide semiconductor (MOS) sensors that change their electrical resistance when they come into contact with specific gases. YouTube MQ-2 "Flying Fish" is a brand or series designation
void loop() for (int i=0; i<numSensors; i++) current[i] = readSensor(i); delta[i] = (current[i] - baseline[i]) / baseline[i]; // relative change if (delta[i] > THRESHOLD && delta[i] < 0.8) // sharp rise // Flying fish detected near sensor i recordPeak(i, millis());