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miguel5612 2020-03-28 08:43:30 -05:00
parent c583fea17c
commit 5659e4c086
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18
examples/MQ-4-ALL/MQ-4-ALL.ino
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@ -38,15 +38,6 @@ void setup() {
//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
/*
Exponential regression:
Gas | a | b
LPG | 3811.9 | -3.113
CH4 | 1012.7 | -2.786
CO | 200000000000000 | -19.05
Alcohol| 60000000000 | -14.01
smoke | 30000000 | -8.308
*/
@ -91,6 +82,15 @@ void setup() {
void loop() { void loop() {
MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
/*
Exponential regression:
Gas | a | b
LPG | 3811.9 | -3.113
CH4 | 1012.7 | -2.786
CO | 200000000000000 | -19.05
Alcohol| 60000000000 | -14.01
smoke | 30000000 | -8.308
*/
MQ4.setA(3811.9); MQ4.setB(-3.113); // Configurate the ecuation values to get CH4 concentration MQ4.setA(3811.9); MQ4.setB(-3.113); // Configurate the ecuation values to get CH4 concentration
float LPG = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup float LPG = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup