TroykaMQ/MQ4.cpp
2016-04-29 17:42:44 +03:00

19 lines
309 B
C++

#include "MQ4.h"
MQ4::MQ4(uint8_t pin)
: BaseMQ(pin) {
}
MQ4::MQ4(uint8_t pin, uint8_t pinHeater)
: BaseMQ(pin, pinHeater) {
}
unsigned long MQ4::readMethane() {
return readPpm(-0.36, 2.54);
}
int MQ4::readPpm(float a, float b) {
float ratio = readRs()/_ro;
return pow(M_E, (log(ratio)-b)/a);
}