#include <Arduino.h>

const int pirAnalogPin = A0;  // PIR OUT connected to A0

void setup() {
  Serial.begin(9600);
  Serial.println("ADC Value Monitoring");
}

void loop() {
  int adcValue = analogRead(pirAnalogPin);
  
  // Clear format: "ADC: 1234"
  Serial.print("ADC: ");
  Serial.println(adcValue);
  
  delay(2000);
}