#include <Arduino.h>

// Define GPIO pins for peripherals
#define LED_PIN 19
#define BUZZER_PIN 22


void setup() {
  Serial.begin(9600);  // Start serial communication at 9600 baud rate
  pinMode(LED_PIN, OUTPUT);        // Set LED pin as output
  pinMode(BUZZER_PIN, OUTPUT);     // Set Buzzer pin as output
Serial.println("Controller Board Ready");  // Initialization message
}

void loop() {
  if (Serial.available() > 0) {
    char command = Serial.read();  // Read the command from the PC

    if (command == 'A') {  // If 'A' is received, test LED
      digitalWrite(LED_PIN, HIGH);  // Turn on LED
      delay(500);  // Wait for 500ms
      digitalWrite(LED_PIN, LOW);   // Turn off LED
    }
    else if (command == 'B') {  // If 'B' is received, test Buzzer
      digitalWrite(BUZZER_PIN, HIGH);  // Activate Buzzer
      delay(500);  // Wait for 500ms
      digitalWrite(BUZZER_PIN, LOW);   // Deactivate Buzzer
    }
    
  }
}