void setup() {
	Serial.begin(9600);
	
	Serial.print("Initialising - ");
	
	pinMode(D0, WAKEUP_PULLUP);
	pinMode(LED_BUILTIN, OUTPUT);
	
	Serial.println("done");
	
	Serial.println("Waiting: ");
	digitalWrite(LED_BUILTIN, HIGH);
	for(int i = 0; i < 5; i++) {
		delay(1000);
		Serial.print(".");
	}
	digitalWrite(LED_BUILTIN, LOW);
	Serial.println();
	Serial.println("Entering deep sleep.");
	ESP.deepSleep(5 * 1000000);
	Serial.begin(9600);
	Serial.println("Sleep complete");
}

void loop() {
	
}