Arduino Forum

Topics => Home Automation and Networked Objects => Topic started by: anupam_on on Jan 20, 2015, 10:20 am

Title: Arduino Wifi data transmission with proxy connection
Post by: anupam_on on Jan 20, 2015, 10:20 am
Hi, I was trying to GET and POST data over proxy. I am using wifi to connect to one wifi hotspost which has proxy

This is my code so far :

Code: [Select]
#include <SPI.h>
#include <WiFi.h>

char ssid[] = "SSIDname"; //  your network SSID (name)
//char pass[] = "secretPassword";    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;            // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(74,125,232,128);  // numeric IP for Google (no DNS)
char server[] = "";    // name address for Google (using DNS)

// 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):
WiFiClient client;

void setup() {
  //Initialize serial and wait for port to open:
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:

  String fv = WiFi.firmwareVersion();
  if( fv != "1.1.0" )
    Serial.println("Please upgrade the firmware");
  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:   
    status = WiFi.begin(ssid);
    // wait 10 seconds for connection:
  Serial.println("Connected to wifi");
  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  if (client.connect(server, 8080)) {
    Serial.println("connected to server");
client.println("User: india%5c12345"); //%5c is hex for "/" character
client.println("Password: anupam123%23%23%24%24"); //%23%23%24%24 is hex for ##$$ characters
        client.println("GET HTTP/1.1");
    client.println("Connection: close");

void loop() {
  // if there are incoming bytes available
  // from the server, read them and print them:
  while (client.available()) {
    char c =;

  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println("disconnecting from server.");

    // do nothing forevermore:

void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.println(" dBm");

But I was unable to GET, The response I am getting is :

Attempting to connect to SSID: SSIDname
Connected to wifi
IP Address:
signal strength (RSSI):-59 dBm

Starting connection to server...
connected to server
<HEAD><TITLE>Unknown Host</TITLE></HEAD>
<BODY BGCOLOR="white" FGCOLOR="black"><H1>Unknown Host</H1><HR>
<FONT FACE="Helvetica,Arial"><B>
Description: Unable to locate the server named "<em>india%5c12345</em>" --- the server does not have a DNS entry.  Perhaps there is a misspelling in the server name, or the server no longer exists.  Double-check the name and try again.</B></FONT>
<!-- default "Unknown Host" response (504) -->

Can anyone please guide me .
Title: Re: Arduino Wifi data transmission with proxy connection
Post by: avin559 on Mar 31, 2015, 02:23 pm

Have you implemented connecting to internet through proxy ? If yes please Let me know the process of implementing it. I am trying to implement same.
Title: Re: Arduino Wifi data transmission with proxy connection
Post by: SurferTim on Mar 31, 2015, 04:04 pm
The GET line must be first in the header.
Title: Re: Arduino Wifi data transmission with proxy connection
Post by: avin559 on Mar 31, 2015, 04:10 pm
Hi ,

Sorry, I did not understand. can you please elaborate your answer or post the working code ?