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

void timer_callback(void *args)
{
    static bool on;
    on = !on;
    gpio_set_level(GPIO_NUM_4, on);
}

void app_main(void)
{
    // below line no longer required for IDF 5
    // gpio_pad_select_gpio(GPIO_NUM_4);
    gpio_set_direction(GPIO_NUM_4, GPIO_MODE_OUTPUT);

    const esp_timer_create_args_t esp_timer_create_args = {
        .callback = timer_callback,
        .name = "My timer"};
    esp_timer_handle_t esp_timer_handle;
    esp_timer_create(&esp_timer_create_args, &esp_timer_handle);
    esp_timer_start_periodic(esp_timer_handle, 50);

    int x = 0;
    while (true)
    {
        esp_timer_dump(stdout);
        vTaskDelay(pdMS_TO_TICKS(1000));
        if (x++ == 5)
        {
            esp_timer_stop(esp_timer_handle);
            esp_timer_delete(esp_timer_handle);
        }
    }
}