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19 lines
316 B
C++
19 lines
316 B
C++
#include "MQ7.h"
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MQ7::MQ7(uint8_t pin)
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: BaseMQ(pin) {
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}
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MQ7::MQ7(uint8_t pin, uint8_t pinHeater)
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: BaseMQ(pin, pinHeater) {
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}
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unsigned long MQ7::readCarbonMonoxide() {
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return readPpm(-0.77, 3.38);
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}
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int MQ7::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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