// Master Arduino (simulating ESP32 controller)

void setup() {
  Serial.begin(9600);
  delay(2000);
  Serial.println("System Ready. Sending Pick Order...");
}

void loop() {
  // Send pick command every 5 seconds
  Serial.println("P1");  // Order to Slave
  delay(5000);

  // Listen for confirmation
  if (Serial.available()) {
    String msg = Serial.readStringUntil('\n');
    if (msg == "P1_DONE") {
      Serial.println("Slave confirmed PICK 1 completed.");
    }
  }
}