int led = 13;
int pirdata = 15;
int pirstate = LOW;
int value = 0;
void setup() {
  pinMode(led, OUTPUT);
  pinMode(pirdata, INPUT);
  Serial.begin(115200);


}
void loop() {
  value = digitalRead(pirdata);

  if (value == HIGH) {
    digitalWrite(led, HIGH);
    if (pirstate == LOW) {
      Serial.println("Motion detected!");
      pirstate = HIGH;
    }
  } 
  else {
    digitalWrite(led, LOW);

    if (pirstate == HIGH) {
      Serial.println("Motion ended!");
      pirstate = LOW;
    }
  }
}