#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

#include "driver/ledc.h"

#define BUZZER_0 19
#define BUZZER_1 18
#define BUZZER_2 17
#define BUZZER_3 16

void app_main() {
  printf("\napp_main()\n\n");
  ledc_set_pin(BUZZER_0, LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
  ledc_set_freq(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0, 440);

  vTaskDelay(pdMS_TO_TICKS(500));

  ledc_stop(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0);
  vTaskDelete(NULL);
}