#define COUNT_LOW 2400
#define COUNT_HIGH 8500

#define SERVO_CHANNEL 5

#define TIMER_WIDTH 16

#include "esp32-hal-ledc.h"

void setup() {
  ledcSetup(1, 50, TIMER_WIDTH);
  ledcAttachPin(SERVO_CHANNEL,1);

}

void loop() {
  for (int i = COUNT_LOW; i < COUNT_HIGH; i+=20) {
    ledcWrite(1, i);
    delay(10);
  }
  for (int i = COUNT_HIGH; i > COUNT_LOW+100; i-=20) {
    ledcWrite(1, i);
    delay(10);
  }

}