diff --git a/exam3-2.ino b/exam3-2.ino
new file mode 100644
index 0000000..ebdcb1c
--- /dev/null
+++ b/exam3-2.ino
@@ -0,0 +1,124 @@
+#include <Arduino.h>
+#include <ESP8266WiFi.h>
+#include <Arduino_JSON.h>
+
+
+#ifndef STASSID
+  #define STASSID "1"
+  #define STAPSK  "16888qwe"  
+#endif
+
+const char* ssid = STASSID;
+const char* password = STAPSK;
+
+const char* host = "www.bigiot.net";
+const int tcpPort = 8181;
+
+String line = "";
+String cmd="";
+
+WiFiClient client;
+
+const int LedPin = D2;//在本demo中是控制的ESP8266的D4 口，可根据自己需求更改。
+const String DevConnectStr = "{\"M\":\"checkin\",\"ID\":\"31051\",\"K\":\"5f0c618aa\"}\n";
+//软件调试
+void setup() 
+{
+
+  Serial.begin(115200);
+
+  pinMode(LedPin, OUTPUT);
+  
+  for(int i=0;i<2;i++) //端口测试
+  {
+    digitalWrite(LedPin, HIGH);
+    Serial.println("Turn Off");
+    delay(2000);
+    digitalWrite(LedPin, LOW);
+    Serial.println("Turn Off");
+    delay(2000);
+    
+  }
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  int i = 0;
+  while (WiFi.status() != WL_CONNECTED) 
+  {
+    delay(500); 
+    Serial.println("connecting AP...");
+    i++;   
+  }
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+
+   while (!client.connected())//若未连接到服务端，则客户端进行连接。
+    {
+        if (!client.connect(host, tcpPort))//实际上这一步就在连接服务端，如果连接上，该函数返回true
+        {
+            Serial.println("connecting....");
+            delay(500);
+        }
+    }
+    client.print(DevConnectStr);//发送http连接Json数据包
+}
+int connSecond=0;
+unsigned long lastTimeMs=0;
+unsigned long nowTimeMs=0;
+void loop() 
+{
+         
+     nowTimeMs=millis();
+      if(nowTimeMs-lastTimeMs>10000)//发送心跳周期:10秒
+      {
+        lastTimeMs= nowTimeMs;   
+        if(client.connected()) //已经连接到云服务器
+        {
+           client.print(DevConnectStr);
+           //Serial.print("send heartbeat.");
+        }
+      }
+            
+      if (client.connected()) //接收处理
+      {
+        line = client.readStringUntil('\n');   
+        if(line.length()>0)
+        {
+           JSONVar myObject = JSON.parse(line); 
+           //Serial.print(line);
+           if (myObject.hasOwnProperty("C")) 
+           {
+              cmd = (const char*) myObject["C"]; 
+              //Serial.println(cmd);
+             if(cmd.indexOf("play")!=-1)
+             {
+              //增加指令处理函数              
+              //digitalWrite(LedPin, HIGH); // (第一阶段)
+              //增加串口输出，控制zigbee节点的LED  (第二阶段)  
+              Serial.println("A:0");  
+             }
+             else if(cmd.indexOf("stop")!=-1)
+             {
+              //增加指令处理函数
+              
+              //digitalWrite(LedPin, LOW); // (第一阶段)
+              //增加串口输出，控制zigbee节点的LED  (第二阶段)          
+              Serial.println("A:1");  
+             }
+           }
+        }
+      
+      }
+      else //已经断开连接
+      {
+        while (!client.connected())//若未连接到服务端，则客户端进行连接。
+        {
+            if (!client.connect(host, tcpPort))//实际上这一步就在连接服务端，如果连接上，该函数返回true
+            {
+                Serial.println("connection....");
+                delay(500);
+            }
+        }
+      }
+}
+