Arduino Pulse Timing Inconsistent — Complete Guide

In this tutorial, you'll learn about Arduino Pulse Timing Inconsistent. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

The Problem

Pulse measurements vary significantly between readings.

Quick Fix

Wrong

unsigned long t = pulseIn(7, HIGH);  // Single reading may be noisy

Readings fluctuate due to noise or sensor jitter.

Right

int sensorPin = 7;

unsigned long readPulse() {
  const int samples = 5;
  unsigned long total = 0;
  int valid = 0;
  for (int i = 0; i < samples; i++) {
    unsigned long t = pulseIn(sensorPin, HIGH, 5000000);
    if (t > 0) {
      total += t;
      valid++;
    }
    delay(10);
  }
  return valid > 0 ? total / valid : 0;
}

void loop() {
  unsigned long avg = readPulse();
  Serial.println(avg);
  delay(100);
}

Steady average pulse value with reduced noise.

Prevention

Average multiple pulseIn() readings to reduce noise. Remove outliers (values more than 2x standard deviation). Use a moving average filter for continuous readings. Ensure the signal source is stable — check wiring and power supply noise.

DodaTech engineers apply these same patterns across Doda Browser, DodaZIP, and Durga Antivirus Pro for production IoT reliability.

FAQ