56 lines
1,006 B
C++
56 lines
1,006 B
C++
#include "MQ135New.h"
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MQ135::MQ135(uint8_t pin) {
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_pin = pin;
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}
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double MQ135::getRS() {
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double voltage = getVoltage();
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double RS = (double)((double)(VIn * RL) / voltage) - RL;
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return RS;
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}
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double MQ135::getVoltage() {
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int value = analogRead(_pin);
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double voltage = (double)(value * VIn) / (double)(Resolution - 1);
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return voltage;
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}
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double MQ135::getPPM(float a, float b) {
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double ratio = getRS() / R0;
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double ppm = a * pow(ratio, b);
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return ppm;
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}
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double MQ135::getAcetona() {
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return getPPM(34.668, -3.369);
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}
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double MQ135::getAlcohol() {
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return getPPM(77.255, -3.18);
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}
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double MQ135::getCO2() {
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return getPPM(110.47, -2.862) + ATMOCO2;
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}
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double MQ135::getCO() {
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return getPPM(605.18, -3.937);
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}
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double MQ135::getNH4() {
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return getPPM(102.2, -2.473);
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}
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double MQ135::getTolueno() {
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return getPPM(44.947, -3.445);
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}
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float MQ135::getR0() {
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double r0 = getRS() / 3.6;
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return r0;
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}
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void MQ135::setR0(float r0) {
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R0 = r0;
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}
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