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Updated basic examples

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miguel5612
2020-03-27 22:03:29 -05:00
parent d0f49fa4f0
commit 9a1974033e
12 changed files with 274 additions and 27 deletions
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25
examples/MQ-135/MQ-135.ino
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@ -26,6 +26,7 @@
#define pin A0 //Analog input 0 of your arduino
#define type "MQ-135" //MQ135
#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
#define RatioMQ135CleanAir 3.6//RS / R0 = 3.6 ppm
//#define calibration_button 13 //Pin to calibrate your sensor
//Declare Sensor
@ -50,8 +51,28 @@ void setup() {
Acetona | 34.668 | -3.369
*/
// Calibration setup
MQ135.setR0(76.63);
/***************************** 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
// Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
Serial.print("Calibrating please wait.");
int calcR0 = 0;
for(int i = 0; i<=10; i ++)
{
MQ135.update(); // Update data, the arduino will be read the voltage on the analog pin
calcR0 += MQ135.calibrate(RatioMQ135CleanAir);
Serial.print(".");
}
MQ135.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);}
/***************************** MQ CAlibration ********************************************/
/*
//If the RL value is different from 10K please assign your RL value with the following method: