DFRobot FireBeetle ESP32-E Manual page 40

}
void loop(){
//This is not going to be called
}
Member Functions
esp_sleep_get_wakeup_cause()
Descriptin：Check which wake-up source triggered a wake-up from sleep mode
esp_deep_sleep_start()
Descriptin：Enter sleep mode
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR)
Descriptin：user timer to start wake-up from deep sleep.
8. Arduino Tutorial Basics
8.1 GPIO
Digital IO
digitalRead(pin)
Description: Reads the value from a specified digital pin, either HIGH or LOW.
Parameter:
pin：the Arduino pin number you want to read
digitalWrite（pin,value）
Description: Write a HIGH or a LOW value to a digital pin. Parameter: