PIR Motion Sensor Arduino Project
Author: Aus Electronics Direct Date Posted:9 April 2019
PIR Motion Sensor Arduino Project
This tutorial demonstrates how to detect motion from PIR Sensor using Arduino Uno Development Board. When the PIR detects, it will trigger the LED to light up showing as the output.
Electric Parts Required
- 1x Arduino Uno Development Board
- 1x PIR Motion Sensor
- 1x LED
- 1x Jumper Cable
Please follow the schematic below to setup this project.
Code:
PIR Motion Sensor with Arudino Demo Code
*/
int led = 13; // Define the LED as Pin 13
int sensor = 4; // Define the Sensor Connected to Pin 4
int state = LOW; // Motion Detection
int val = 0; // Store the value of sensor
void setup() {
pinMode(led, OUTPUT); // initialize the LED as the output
pinMode(sensor, INPUT); // initialize the sensor as the input
Serial.begin(9600); // Define the serial communication
}
void loop(){
val = digitalRead(sensor); // Reading the sensor value
if (val == HIGH) { // if sensor is high
digitalWrite(led, HIGH); // switch on the LED
delay(100); // 100 milliseconds delay
if (state == LOW) {
Serial.println("Motion was detected");
state = HIGH; // Update the variable state in to HIGH
}
}
else {
digitalWrite(led, LOW); // Turning off the LED
delay(200); // 200 milliseconds delay
if (state == HIGH){
Serial.println("Motion stopped!");
state = LOW; // update the variable state into LOW
}
}
}
