VMU_B4_HD2_Độ sáng LED bằng PWM - Wokwi ESP32, STM32, Arduino Simulator

void setup() {
  pinMode(9, OUTPUT);
}

void loop() {
  analogWrite(9, 255);
  delay(500);
  
  analogWrite(9, 128);
  delay(500);

  analogWrite(9, 0);
  delay(500);
}