#define red_pin 27
#define green_pin 26
#define BUZZER 14

void setup() {
  // Configure LED PWM functionalities.
  ledcSetup(0, 5000, 8);
  ledcSetup(1, 5000, 8);

  // Attach RGB pins.
  ledcAttachPin(red_pin, 0);
  ledcAttachPin(green_pin, 1);

  // Configure BUZZER functionalities.
  ledcSetup(2, 100, 12); // Set initial frequency to 100 Hz

  // Attach BUZZER pin.
  ledcAttachPin(BUZZER, 2);

  Serial.begin(115200);
}

void loop() {
  changeColor(255, 255);
  // Change buzzer frequency to different values with a 0.5-second interval
  ledcWriteTone(2, 100);  // Change buzzer frequency to 100 Hz
  delay(500);
  ledcWriteTone(2, 1500); // Change buzzer frequency to 1.5 kHz
  delay(500);
  ledcWriteTone(2, 2200); // Change buzzer frequency to 2.2 kHz
  delay(500);
}

void changeColor(int R, int G) {
  // Display color pattern on the module.
  ledcWrite(1, 255 - R);
  ledcWrite(1, 255 - G);

  // Define the rgb color variable and print it on the serial monitor.
  String color = "rgb(" + String(R) + "," + String(G) + ",0)";
  Serial.print("Color: " + color);
}