How to use The Mini PIR Sensor Module

The mini PIR sensor module (HC-SR505) is a sensor that can detect motion through the use of infrared light. In this guide, we will be using the Mini PIR Sensor Module (HC-SR505) that is found in our shop.

Parts

• Mini PIR Sensor Module (HC-SR505)
• M/F Jumper wires
• Arduino Uno R3
• Arduino IDE

Wiring Guide

Step 1: Connect the PIR sensor pins to the Arduino

Sensor	Arduino
+	5V
S	Pin 3
-	GND

Programming

Step 1: First of all, define the pin number that is connected to the signal output

int signalPin = 3;

Step 2: Start the serial monitor and activate the pin that is connected to the signal output

void setup(){
  Serial.begin(9600);
  pinMode(signalPin, INPUT);
}

Step 3: Write down some code that will print on the serial monitor whether the sensor senses movement or not

void loop(){
  if(digitalRead(signalPin)==HIGH){
    Serial.println("Movement detected");
  }else{
    Serial.println("Did not detect movement");
  }
  delay(1000);
}

Full Code

int signalPin = 3;

void setup(){
  Serial.begin(9600);
  pinMode(signalPin, INPUT);
}

void loop(){
  if(digitalRead(signalPin)==HIGH){
    Serial.println("Movement detected");
  }else{
    Serial.println("Did not detect movement");
  }
  delay(1000);
}

Output

Serial Monitor