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23 lines
374 B
C++
23 lines
374 B
C++
#include "MQ5.h"
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MQ5::MQ5(uint8_t pin)
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: BaseMQ(pin) {
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}
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MQ5::MQ5(uint8_t pin, uint8_t pinHeater)
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: BaseMQ(pin, pinHeater) {
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}
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unsigned long MQ5::readLPG() {
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return readPpm(-0.39, 1.73);
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}
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unsigned long MQ5::readMethane() {
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return readPpm(-0.38, 1.97);
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}
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int MQ5::readPpm(float a, float b) {
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float ratio = readRs()/_ro;
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return pow(M_E, (log(ratio)-b)/a);
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}
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