FireBeetle ESP32 deep sleep

hi all,

我购置了一块FireBeetle ESP32 ，当我设置完 Arduino IDE之后烧录原 ESP32 DEV 板的DEEP sleep程序后会报错，我发现在DFRobot_FireBeetle-ESP32-0.0.1.zip并没有ESP32 deep sleep库文件，这是因为调用不成功所导致吗？

急盼知道的朋友给予指点。
C:\Users\AndyWang\Desktop\espressif\esp32\libraries\ESP32\examples\DeepSleep\TimerWakeUp\TimerWakeUp.ino: In function 'void print_wakeup_reason()':

TimerWakeUp:32: error: 'esp_sleep_wakeup_cause_t' was not declared in this scope

   esp_sleep_wakeup_cause_t wakeup_reason;

   ^

TimerWakeUp:34: error: 'wakeup_reason' was not declared in this scope

   wakeup_reason = esp_sleep_get_wakeup_cause();

   ^

TimerWakeUp:34: error: 'esp_sleep_get_wakeup_cause' was not declared in this scope

   wakeup_reason = esp_sleep_get_wakeup_cause();

                                              ^

C:\Users\AndyWang\Desktop\espressif\esp32\libraries\ESP32\examples\DeepSleep\TimerWakeUp\TimerWakeUp.ino: In function 'void setup()':

TimerWakeUp:62: error: 'esp_sleep_enable_timer_wakeup' was not declared in this scope

   esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);

                                                               ^

exit status 1
'esp_sleep_wakeup_cause_t' was not declared in this scope