Circuit Diagram:
Code:
int ledPin = PB9; // LED
int PIRsensor=PB1; //The output of PIR sensor connected to pin B1
int sensor_value=00; //variable to hold read sensor value
void setup()
{
pinMode(ledPin, OUTPUT);
pinMode(PIRsensor,INPUT); // configuring pin 7 as Input
Serial.begin(115200); // To show output value of sensor in serial monitor
}
void loop()
{
sensor_value=digitalRead(PIRsensor); // Reading sensor value from pin B1
if (sensor_value == HIGH) { // if motion detected
digitalWrite(ledPin, HIGH); // turn LED ON
}
else {
digitalWrite(ledPin, LOW); // turn LED OFF if we have no motion
}
Serial.println(sensor_value); // Printing output to serial monitor
}