TTT4260/D2/MeasureFreq/MeasureFreq.ino

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Arduino
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2021-04-25 18:18:10 +02:00
/* Program to measure the frequenncy of a input, on digital pin 8
* Made by Oyvind Skaaden
*/
#include <FreqMeasure.h> // Library for measure
#define out 4 // The pin the transistor is controlled by
float rpm = 40000; // The limit for when to open the transistor
bool ledUnderRPM = true; // Change this to light the LED should light when the rpm are over rpm
float freq = rpm / 60;
void setup() {
Serial.begin(57600);
FreqMeasure.begin();
}
double sum=0;
int count=0;
void loop() {
if (FreqMeasure.available()) {
// average several reading together
sum = sum + FreqMeasure.read();
count = count + 1;
if (count > 30) {
float frequency = FreqMeasure.countToFrequency(sum / count);
Serial.print(frequency);
if (frequency < freq) { // If the measured frequency is below the RPM do this
digitalWrite(out, ledUnderRPM);
Serial.println(" ON");
}
else{
digitalWrite(out, !ledUnderRPM);
Serial.println(" OFF");
}
sum = 0;
count = 0;
}
}
}