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miguel5612 2020-03-28 12:28:36 -05:00
parent ce87a05178
commit 0e8c0b3f5f
1 changed files with 6 additions and 30 deletions
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36
examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
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@ -75,43 +75,19 @@ void setup() {
/************************************************************************************/
MQ4.init();
Serial.println("*************************** Lectures from MQ-board ***************************");
Serial.println("| LPG | CH4 | CO | Alcohol | Smoke |");
Serial.println("** Lectures from MQ-4**********");
Serial.println("| LPG |");
}
void loop() {
MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
/*
Exponential regression:
Gas | a | b
LPG | 3811.9 | -3.113
CH4 | 1012.7 | -2.786
CO | 200000000000000 | -19.05
Alcohol| 60000000000 | -14.01
smoke | 30000000 | -8.308
*/
MQ4.setA(3811.9); MQ4.setB(-3.113); // Configurate the ecuation values to get CH4 concentration
//https://jayconsystems.com/blog/understanding-a-gas-sensor
MQ4.setA(-0.318; MQ4.setB(1.133); // A -> Slope, B -> Intersect with X - Axis
float LPG = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ4.setA(1012.7); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration
float CH4 = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ4.setA(200000000000000); MQ4.setB(-19.05); // Configurate the ecuation values to get CH4 concentration
float CO = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ4.setA(60000000000); MQ4.setB(-14.01); // Configurate the ecuation values to get CH4 concentration
float Alcohol = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ4.setA(30000000); MQ4.setB(-8.308); // Configurate the ecuation values to get CH4 concentration
float Smoke = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
Serial.print("| "); Serial.print(LPG);
Serial.print(" | "); Serial.print(CH4);
Serial.print(" | "); Serial.print(CO);
Serial.print(" | "); Serial.print(Alcohol);
Serial.print(" | "); Serial.print(Smoke);
Serial.println(" |");
Serial.print("| "); Serial.print(LPG);
Serial.println(" |");
delay(500); //Sampling frequency
}