Add ESP deep sleep test

deepsleep/deepsleep.ino

@@ -0,0 +1,29 @@
+
+
+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() {
+	
+}