/*
 * ESP32 PWM Multiple LED
 * Mengontrol 3 LED dengan satu channel PWM
 */

// Pin definitions
const int ledPin1 = 16;   // GPIO16
const int ledPin2 = 17;   // GPIO17
const int ledPin3 = 5;    // GPIO5

// PWM properties
const int freq = 5000;
const int resolution = 8;

void setup() {
  Serial.begin(115200);
  Serial.println("ESP32 Multiple LED PWM - Started");
  
  // Attach all pins to PWM with same settings
  ledcAttach(ledPin1, freq, resolution);
  ledcAttach(ledPin2, freq, resolution);
  ledcAttach(ledPin3, freq, resolution);
}

void loop() {
  // All LEDs will have synchronized brightness
  for(int dutyCycle = 0; dutyCycle <= 255; dutyCycle++) { 
    ledcWrite(ledPin1, dutyCycle);
    ledcWrite(ledPin2, dutyCycle);
    ledcWrite(ledPin3, dutyCycle);
    delay(15);
  }
  
  for(int dutyCycle = 255; dutyCycle >= 0; dutyCycle--) {
    ledcWrite(ledPin1, dutyCycle);
    ledcWrite(ledPin2, dutyCycle);
    ledcWrite(ledPin3, dutyCycle);
    delay(15);
  }
}