Merge branch 'patch-3' of https://github.com/hwwr/Arduino into hwwr-patch-3

Author: igrr

hardware/esp8266com/esp8266/libraries/ESP8266WiFi/examples/SmartConfig

@@ -0,0 +1,51 @@
+#include <ESP8266WiFi.h>
+#include <WiFiUdp.h>
+
+WiFiUDP Udp;
+
+void setup() {
+  uint8_t cnt = 0;
+  
+  Serial.begin(115200);
+  
+  WiFi.mode(WIFI_STA);
+  WiFi.begin();
+  
+  while(WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+    if(cnt++ >= 10){
+       WiFi.setSmartLink();
+       while(1){
+           delay(1000);
+           if(WiFi.getSmartlinkStatus() == SC_STATUS_LINK_OVER){
+             Serial.println("SmartConfig Success");
+             break;
+           }
+       }
+    }
+  }
+  
+  Serial.println("");
+  Serial.println("");
+  
+  WiFi.printDiag(Serial);
+  
+  // Start the server
+  Udp.begin(49999);
+  Serial.println("USP Server started");
+
+  // Print the IP address
+  Serial.println(WiFi.localIP());
+}
+
+void loop() {
+  // Check if a client has connected
+  Udp.parsePacket();
+  while(Udp.available()){
+    Serial.println(Udp.remoteIP());
+    Udp.flush();
+    delay(5);
+  }
+}
+