Go Down

Topic: [Solved] Wifi Shield Unreachable (Read 803 times) previous topic - next topic

tomcnnll

Jan 11, 2013, 11:51 pm Last Edit: Jan 13, 2013, 04:29 am by tomcnnll Reason: 1
Hello all,

So I set up an Arduino Leonardo with the official WiFi Shield, and I uploaded the SimpleWebServerWifi example that is packed with the library.

The green link indicator is on.  The device prints it's assigned IP through serial, 192.168.1.12, the link indicator light is on, and I can confirm that the device received this IP through my router.

However, when I try to ping my device, or open the IP in a web browser, I get "host unreachable" or a "could not connect" page.

Thanks in advance!

johnwasser

Are you sure the device with the web browser is on the same LAN/WLAN?  If it's connected to a different network (different router) it wouldn't be able to reach the LAN/WLAN.
Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e

tomcnnll

Definitely on the same network.

tomcnnll

I want to add that, in the SimpleWebServerWiFi example, it should print "new client" to serial when it receives a http request, and even though I can see other printlns in my serial monitor, and even though I tried to visit the device in a browser, this confirmation is never printed.

johnwasser

I just went to the official WiFi Shield page:

http://arduino.cc/en/Main/ArduinoWiFiShield

and I downloaded the official "WiFi Shield Library":

http://arduino.cc/en/uploads/Main/WiFiShield_library.zip

I don't see a "SimpleWebServerWiFi" example.  The closest I see is "WiFiWebServer".

Are you sure you have the latest version of the right library?
Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e

tomcnnll

Hmmm, that's odd. I have the example sketch in 1.0.3, I'll copy-paste the code since it seems like it disappeared.

Code: [Select]

/*
  WiFi Web Server LED Blink

A simple web server that lets you blink an LED via the web.
This sketch will print the IP address of your WiFi Shield (once connected)
to the Serial monitor. From there, you can open that address in a web browser
to turn on and off the LED on pin 9.

If the IP address of your shield is yourAddress:
http://yourAddress/H turns the LED on
http://yourAddress/L turns it off

This example is written for a network using WPA encryption. For
WEP or WPA, change the Wifi.begin() call accordingly.

Circuit:
* WiFi shield attached
* LED attached to pin 9

created 25 Nov 2012
by Tom Igoe
*/
#include <SPI.h>
#include <WiFi.h>

char ssid[] = "yourNetwork";      //  your network SSID (name)
char pass[] = "secretPassword";   // your network password
int keyIndex = 0;                 // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;
WiFiServer server(80);

void setup() {
  Serial.begin(9600);      // initialize serial communication
  pinMode(9, OUTPUT);      // set the LED pin mode

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    while(true);        // don't continue
  }

  // attempt to connect to Wifi network:
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to Network named: ");
    Serial.println(ssid);                   // print the network name (SSID);

    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:   
    status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  }
  server.begin();                           // start the web server on port 80
  printWifiStatus();                        // you're connected now, so print out the status
}


void loop() {
  WiFiClient client = server.available();   // listen for incoming clients

  if (client) {                             // if you get a client,
    Serial.println("new client");           // print a message out the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) { 
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:   
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();

            // the content of the HTTP response follows the header:
            client.print("Click <a href=\"/H\">here</a> turn the LED on pin 9 on<br>");
            client.print("Click <a href=\"/L\">here</a> turn the LED on pin 9 off<br>");

            // The HTTP response ends with another blank line:
            client.println();
            // break out of the while loop:
            break;         
          }
          else {      // if you got a newline, then clear currentLine:
            currentLine = "";
          }
        }     
        else if (c != '\r') {    // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }

        // Check to see if the client request was "GET /H" or "GET /L":
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(9, HIGH);               // GET /H turns the LED on
        }
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(9, LOW);                // GET /L turns the LED off
        }
      }
    }
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
}

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

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

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
  // print where to go in a browser:
  Serial.print("To see this page in action, open a browser to http://");
  Serial.println(ip);
}

tomcnnll

For some reason all it took was resetting the router. Thanks for your help!

Go Up