#include "esp32-hal-ledc.h"
int freq = 5000;
int ledChannel = 0;
int resolution = 8;
int ledpwm = 10;
void setup() {
  pinMode(ledpwm, OUTPUT);
  ledcSetup(ledChannel, freq, resolution);
  ledcAttachPin(ledpwm, ledChannel);
  
}
 
void loop() {
 
  for (int dutyCycle = 0; dutyCycle <= 255; dutyCycle++) {
    ledcWrite(ledChannel, dutyCycle);
    delay(7);
  }
 
  for (int dutyCycle = 255; dutyCycle >= 0; dutyCycle--) {
    ledcWrite(ledChannel, dutyCycle);
    delay(7);
  }
 
}