alexey.zholtikov/MQSensorsLib
1
0
Fork 0
mirror of https://github.com/miguel5612/MQSensorsLib.git synced 2025-07-26 06:01:03 +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

26
examples/MQ-135-CorrectionFactorDHT11/MQ-135-CorrectionFactorDHT11.ino
View File

@ -15,7 +15,7 @@
Wiring:
https://github.com/miguel5612/MQSensorsLib_Docs/blob/master/static/img/MQ_Arduino.PNG
Please take care, arduino A0 pin represent the analog input configured on #define pin
Please make sure arduino A0 pin represents the analog input configured on #define pin
This example code is in the public domain.
@ -81,7 +81,7 @@ void setup() {
//Set math model to calculate the PPM concentration and the value of constants
MQ135.setRegressionMethod(1); //_PPM = a*ratio^b
MQ135.setA(102.2); MQ135.setB(-2.473); // Configurate the ecuation values to get NH4 concentration
MQ135.setA(102.2); MQ135.setB(-2.473); // Configure the equation to to calculate NH4 concentration
/*
Exponential regression:
@ -89,9 +89,9 @@ void setup() {
CO | 605.18 | -3.937
Alcohol | 77.255 | -3.18
CO2 | 110.47 | -2.862
Tolueno | 44.947 | -3.445
Toluen | 44.947 | -3.445
NH4 | 102.2 | -2.473
Acetona | 34.668 | -3.369
Aceton | 34.668 | -3.369
*/
/***************************** MQ Init ********************************************/
@ -104,24 +104,24 @@ 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 ++)
{
MQ135.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ135.update(); // Update data, the arduino will read the voltage from 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);}
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 ********************************************/
MQ135.serialDebug(true);
// Set delay between sensor readings based on sensor details.
@ -138,8 +138,8 @@ void loop() {
float cFactor = 0;
if (!isnan(event.temperature) && !isnan(event.relative_humidity)) cFactor = getCorrectionFactor(event.temperature, event.relative_humidity);
Serial.print("Correction Factor: "); Serial.println(cFactor);
MQ135.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ135.readSensor(false, cFactor); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ135.update(); // Update data, the arduino will read the voltage from the analog pin
MQ135.readSensor(false, cFactor); // Sensor will read PPM concentration using the model, a and b values set previously or from the setup
MQ135.serialDebug(); // Will print the table on the serial port
}