add draft for esp8266 with Arduino OTA

esp_gateway/esp_gateway.ino

@@ -0,0 +1,54 @@
+#include "Arduino.h"
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#include <ESPmDNS.h>
+#include <ArduinoOTA.h>
+
+const char* ssid = "vulturul";
+const char* password = "***REMOVED***";
+
+void setup()
+{
+	  Serial.begin(9600);                      // Start the serial console
+	  WiFi.mode(WIFI_STA);
+	  WiFi.begin(ssid, password);
+
+	  Serial.println("Connecting to WiFi netowrk.");
+	  while (WiFi.status() != WL_CONNECTED) {
+	    delay(1000);
+	    Serial.println("Establishing connection to WiFi..");
+	  }
+	  Serial.println("Connected to network");
+
+	  setupOTA();
+
+}
+
+void loop()
+{
+	  ArduinoOTA.handle();
+}
+
+void setupOTA() {
+	  ArduinoOTA.onStart([]() {
+	    Serial.println("Start");
+	  });
+	  ArduinoOTA.onEnd([]() {
+	    Serial.println("\nEnd");
+	  });
+	  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
+	    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
+	  });
+	  ArduinoOTA.onError([](ota_error_t error) {
+	    Serial.printf("Error[%u]: ", error);
+	    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
+	    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
+	    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
+	    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
+	    else if (error == OTA_END_ERROR) Serial.println("End Failed");
+	  });
+	  ArduinoOTA.begin();
+	  Serial.println("Ready");
+	  Serial.print("IP address: ");
+	  Serial.println(WiFi.localIP());
+}