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

void app_main(void)
{
    esp_sleep_wakeup_cause_t cause = esp_sleep_get_wakeup_cause();

    if (cause == ESP_SLEEP_WAKEUP_TIMER) {
        printf("Woke up from deep sleep via timer!");
        //vTaskDelay(pdMS_TO_TICKS(100));
        return; // done, halt
    }

    printf("First boot (no deep sleep wakeup). Sleeping for 1 second...");
    //vTaskDelay(pdMS_TO_TICKS(100));
    esp_sleep_enable_timer_wakeup(1 * 1000000ULL);
    esp_deep_sleep_start();
}