// Pin Definitions
#define PIR_PIN 23       // PIR Output connected to GPIO 23
#define RELAY_PIN 18     // Relay IN connected to GPIO 18

void setup() {
  Serial.begin(115200);

  pinMode(PIR_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);

  digitalWrite(RELAY_PIN, LOW);   // Keep relay OFF initially
  Serial.println("System Ready...");
}

void loop() {
  int pirState = digitalRead(PIR_PIN);

  if (pirState == HIGH) {
    Serial.println("Motion Detected!");
    digitalWrite(RELAY_PIN, HIGH);   // Turn ON relay → LED/Motor ON
  } 
  else {
    Serial.println("No Motion");
    digitalWrite(RELAY_PIN, LOW);    // Turn OFF relay → LED/Motor OFF
  }

  delay(500); // Small delay for stability
}