alexey.zholtikov/MQSensorsLib
1
0
Fork 0
mirror of https://github.com/miguel5612/MQSensorsLib.git synced 2025-07-04 03:11:03 +03:00
Code Issues Packages Projects Releases Wiki Activity

Updated and fixed typo examples

Browse Source
This commit is contained in:
miguel5612
2022-03-20 12:53:36 -05:00
parent 990e6878ef
commit 07b6948f76
28 changed files with 302 additions and 302 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
examples/ESP32/esp32.ino
View File

@ -40,7 +40,7 @@ void setup() {
//Set math model to calculate the PPM concentration and the value of constants
MQ3.setRegressionMethod(1); //_PPM = a*ratio^b
MQ3.setA(4.8387); MQ3.setB(-2.68); // Configurate the ecuation values to get Benzene concentration
MQ3.setA(4.8387); MQ3.setB(-2.68); // Configure the equation to to calculate Benzene concentration
/*
Exponential regression:
Gas | a | b
@ -63,31 +63,31 @@ 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 ++)
{
MQ3.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ3.update(); // Update data, the arduino will read the voltage from the analog pin
calcR0 += MQ3.calibrate(RatioMQ3CleanAir);
Serial.print(".");
}
MQ3.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 ********************************************/
MQ3.serialDebug(true);
}
void loop() {
MQ3.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ3.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ3.update(); // Update data, the arduino will read the voltage from the analog pin
MQ3.readSensor(); // Sensor will read PPM concentration using the model, a and b values set previously or from the setup
MQ3.serialDebug(); // Will print the table on the serial port
delay(500); //Sampling frequency
}