#define uS_TO_S_FACTOR 1000000ULL 
#define TIME_TO_SLEEP  30        

RTC_DATA_ATTR int bootCount = 0;

void print_wakeup_reason(){
  esp_sleep_wakeup_cause_t wakeup_reason;

  wakeup_reason = esp_sleep_get_wakeup_cause();

  switch(wakeup_reason)
  {
    case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;//por el serialpritnln dice cual es el nro de boteo y dice la razon de su reseteo.
    case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;//puede entrar en modo bajo consumo profundo
    case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
    case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
    case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
    default : Serial.printf("Wakeup was not caused by deep sleep: %d\n",wakeup_reason); break;
  }
}

void setup(){
  Serial.begin(115200);
  delay(1000); 

  
  ++bootCount;
  Serial.println("Boot number: " + String(bootCount));

  
  print_wakeup_reason();

  
  esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
  Serial.println("Setup ESP32 to sleep for every " + String(TIME_TO_SLEEP) +
  " Seconds");

  Serial.println("Going to sleep now");
  Serial.flush(); 
  esp_deep_sleep_start();
  Serial.println("This will never be printed");
}                                             

void loop(){

}