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Updated and fixed typo examples

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miguel5612
2022-03-20 12:53:36 -05:00
parent 990e6878ef
commit 07b6948f76
28 changed files with 302 additions and 302 deletions
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24
examples/LinearVsExponential/LinearVsExponential.ino
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@ -43,24 +43,24 @@ void setup() {
/***************************** MQ CAlibration ********************************************/
// Explanation:
// In this routine the sensor will measure the resistance of the sensor supposing before was pre-heated
// and now is on clean air (Calibration conditions), and it will setup R0 value.
// We recomend execute this routine only on setup or on the laboratory and save on the eeprom of your arduino
// This routine not need to execute to every restart, you can load your R0 if you know the value
// In this routine the sensor will measure the resistance of the sensor supposedly before being pre-heated
// and on clean air (Calibration conditions), setting up R0 value.
// We recomend executing this routine only on setup in laboratory conditions.
// This routine does not need to be executed on each restart, you can load your R0 value from eeprom.
// Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
Serial.print("Calibrating please wait.");
float calcR0 = 0;
for(int i = 1; i<=10; i ++)
{
MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ4.update(); // Update data, the arduino will read the voltage from the analog pin
calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
Serial.print(".");
}
MQ4.setR0(calcR0/10);
Serial.println(" done!.");
if(isinf(calcR0)) {Serial.println("Warning: Conection issue founded, R0 is infite (Open circuit detected) please check your wiring and supply"); while(1);}
if(calcR0 == 0){Serial.println("Warning: Conection issue founded, R0 is zero (Analog pin with short circuit to ground) please check your wiring and supply"); while(1);}
if(isinf(calcR0)) {Serial.println("Warning: Conection issue, R0 is infinite (Open circuit detected) please check your wiring and supply"); while(1);}
if(calcR0 == 0){Serial.println("Warning: Conection issue found, R0 is zero (Analog pin shorts to ground) please check your wiring and supply"); while(1);}
/***************************** MQ CAlibration ********************************************/
/*
@ -75,23 +75,23 @@ void setup() {
/************************************************************************************/
MQ4.init();
Serial.println("** Lectures from MQ-4**********");
Serial.println("** Values from MQ-4**********");
Serial.println("| LPG (Linear EQ) | LPG (Exponential EQ) |");
}
void loop() {
MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ4.update(); // Update data, the arduino will read the voltage from the analog pin
//https://jayconsystems.com/blog/understanding-a-gas-sensor
//Set math model to calculate the PPM concentration and the value of constants
MQ4.setRegressionMethod(0); //_PPM = pow(10, (log10(ratio)-b)/a)
MQ4.setA(-0.318); MQ4.setB(1.133); // A -> Slope, B -> Intersect with X - Axis
float LPG1 = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
float LPG1 = MQ4.readSensor(); // Sensor will read PPM concentration using the model, a and b values set previously or from the setup
//Set math model to calculate the PPM concentration and the value of constants
MQ4.setRegressionMethod(1); //_PPM = a*ratio^b
MQ4.setA(1012.7); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration
float LPG2 = 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); // Configure the equation to to calculate CH4 concentration
float LPG2 = MQ4.readSensor(); // Sensor will read PPM concentration using the model, a and b values set previously or from the setup
// exposure to 2000 ppm of LPG gas is immediately dangerous to life and health. In this section
if(LPG1>=2000 || LPG2>=2000) Serial.println("Warning - Very high concentrations detected!");