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Fixed smoke calculation

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miguel5612 2020-03-30 10:41:57 -05:00
parent 63f8eed37b
commit d321458f71
1 changed files with 3 additions and 2 deletions
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5
examples/smokeDetector/smokeDetector.ino
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@ -37,7 +37,7 @@ void setup() {
Serial.begin(115200); Serial.begin(115200);
//Set math model to calculate the PPM concentration and the value of constants //Set math model to calculate the PPM concentration and the value of constants
MQ4.setRegressionMethod(1); //_PPM = a*ratio^b MQ4.setRegressionMethod(1); //_PPM = a*ratio^b
MQ4.setA(30000000); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration MQ4.setA(30000000); MQ4.setB(-8.308); // Configurate the ecuation values to get CH4 concentration
/* /*
Exponential regression: Exponential regression:
Gas | a | b Gas | a | b
@ -91,7 +91,8 @@ void setup() {
//Read the sensor and print in serial port //Read the sensor and print in serial port
//Lecture will be saved in lecture variable //Lecture will be saved in lecture variable
MQ4.update(); MQ4.update();
MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup float smokePPM = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
if(smokePPM > 1000) {Serial.println("Warning: High concentrations of smoke detected")};
MQ4.serialDebug(); // Will print the table on the serial port MQ4.serialDebug(); // Will print the table on the serial port
delay(400); delay(400);
} }