Arduino W5100 連線問題

dali93101

各位前輩好我目前正在學習撰寫Arduino程式
利用DHT22偵測溫溼度
搭配使用pushingbox做通知
在W5100的連線上遇到問題
還請各位協助

最下面是我的部份程式
及搭配pushingbox的範例

目前遇到有問題的是在連線至pushingbox的部份
因為我是以一個實體固定IP讓Arduino直接連線
所以需要DNS解析pushingbox的IP
但是如果我將程式碼DNS的部分拿掉
在serial monitor裡面還是會看到出現下面的訊息
-----------------------------------------------------
connecting...
connected
sending request
-----------------------------------------------------

但是因IP無法解析訊息並不會被送出
為甚麼還是會出現connected的訊息
而不是connection failed
謝謝各位前輩


#include <SPI.h>
#include <Ethernet.h>

byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xFE, 0xEF, 0xED };
byte ip[] = {
  122, AAA, BBB, CCC };
byte gateway[] = {
  122, AAA, BBB, 254 };
byte subnet[] = {
  255, 255, 255, 0 };
IPAddress dnServer(8,8,8,8);


char DEVID1[] = "v0123456ABCDEFGH";
uint8_t pinDevid1 = 3

// Debug mode
boolean DEBUG = true;

char serverName[] = "api.pushingbox.com";
boolean pinDevid1State = false;                // Save the last state of the Pin for DEVID1
boolean lastConnected = false;                 // State of the connection last time through the main loop


// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
EthernetClient client;

void setup() {
  Serial.begin(9600);

  Ethernet.begin(mac,ip,dnServer,gateway,subnet);

  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
  delay(1000);
}

void loop()
{
      ////
      // Listening for the pinDevid1 state
      ////
      if (digitalRead(pinDevid1) == HIGH && pinDevid1State == false) // switch on pinDevid1 is ON
      {
        if(DEBUG){Serial.println("pinDevid1 is HIGH");}
        pinDevid1State = true;
        //Sending request to PushingBox when the pin is HIGHT
        sendToPushingBox(DEVID1);
      }
       if (digitalRead(pinDevid1) == LOW && pinDevid1State == true) // switch on pinDevid1 is OFF
      {
        if(DEBUG){Serial.println("pinDevid1 is LOW");}
        pinDevid1State = false;
        //Sending request to PushingBox when the pin is LOW
        //sendToPushingBox(DEVID1);    //Here you can run an other scenario by creating a DEVID2 variable
      }


      //DEBUG part
      // this write the respons from PushingBox Server.
      // You should see a "200 OK"
      if (client.available()) {
        char c = client.read();
        if(DEBUG){Serial.print(c);}
      }

      // if there's no net connection, but there was one last time
      // through the loop, then stop the client:
      if (!client.connected() && lastConnected) {
        if(DEBUG){Serial.println();}
        if(DEBUG){Serial.println("disconnecting.");}
        client.stop();
      }
      lastConnected = client.connected();
}


//Function for sending the request to PushingBox
void sendToPushingBox(char devid[]){
  client.stop();
  if(DEBUG){Serial.println("connecting...");}

  if (client.connect(serverName, 80)) {
    if(DEBUG){Serial.println("connected");}

    if(DEBUG){Serial.println("sending request");}
    client.print("GET /pushingbox?devid=");
    client.print(devid);
    client.println(" HTTP/1.1");
    client.print("Host: ");
    client.println(serverName);
    client.println("User-Agent: Arduino");
    client.println();
  }
  else {
    if(DEBUG){Serial.println("connection failed");}
  }
}