Connecting Arduino boards to Wifi

WORK IN PROGRESS.

Introduction
This guide will cover how to connect Arduino boards to WEP and WPA2 personal networks (Arduinos cannot connect to WPA2 Enterprise networks.) Connecting Arduinos into Wifi takes little time and only requires some basic knowledge on programming and networks.

Network Vocabulary
Make sure you're familiar with some of these concepts:

SSID - Service Set Identifier: An ID to identify a service set. (name of the wireless network.)

WEP and WPA2 encryption. - Types of wireless data encryption algorithms. Only know that these two are     different and require a different set of programs for the Arduino to connect to. (Holistic knowledge of how         these encryptions work is not needed.)

WEP Connection Guide
Please read the following link to connect to a WEP network.

http://www.arduino.cc/en/Tutorial/ConnectWithWEP

Code only:

This code will connect an Arduino to a WEP-encrypted wireless network.

/*

This example connects to a WEP-encrypted Wifi network. Then it prints the  MAC address of the Wifi shield, the IP address obtained, and other network details.

If you use 40-bit WEP, you need a key that is 10 characters long, and the characters must be hexadecimal (0-9 or A-F). e.g.  for 40-bit, ABBADEAF01 will work, but ABBADEAF won't work (too short) and ABBAISDEAF won't work (I and S are not  hexadecimal characters).

For 128-bit, you need a string that is 26 characters long. D0D0DEADF00DABBADEAFBEADED will work because it's 26 characters, all in the 0-9, A-F range.

Circuit: * WiFi shield attached

created 13 July 2010 by dlf (Metodo2 srl) modified 31 May 2012 by Tom Igoe */
 * 1) include 

char ssid[] = "yourNetwork";                     // your network SSID (name) char key[] = "D0D0DEADF00DABBADEAFBEADED";       // your network key int keyIndex = 0;                                // your network key Index number int status = WL_IDLE_STATUS;                     // the Wifi radio's status

void setup { //Initialize serial and wait for port to open: Serial.begin(9600); 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: while(true); }

// attempt to connect to Wifi network: while ( status != WL_CONNECTED) { Serial.print("Attempting to connect to WEP network, SSID: "); Serial.println(ssid); status = WiFi.begin(ssid, keyIndex, key);

// wait 10 seconds for connection: delay(10000); }

// once you are connected : Serial.print("You're connected to the network"); printCurrentNet; printWifiData; }

void loop { // check the network connection once every 10 seconds: delay(10000); printCurrentNet; }

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

// print your MAC address: byte mac[6]; WiFi.macAddress(mac); Serial.print("MAC address: "); Serial.print(mac[5],HEX); Serial.print(":"); Serial.print(mac[4],HEX); Serial.print(":"); Serial.print(mac[3],HEX); Serial.print(":"); Serial.print(mac[2],HEX); Serial.print(":"); Serial.print(mac[1],HEX); Serial.print(":"); Serial.println(mac[0],HEX); }

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

// print the MAC address of the router you're attached to: byte bssid[6]; WiFi.BSSID(bssid); Serial.print("BSSID: "); Serial.print(bssid[5],HEX); Serial.print(":"); Serial.print(bssid[4],HEX); Serial.print(":"); Serial.print(bssid[3],HEX); Serial.print(":"); Serial.print(bssid[2],HEX); Serial.print(":"); Serial.print(bssid[1],HEX); Serial.print(":"); Serial.println(bssid[0],HEX);

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

// print the encryption type: byte encryption = WiFi.encryptionType; Serial.print("Encryption Type:"); Serial.println(encryption,HEX); Serial.println; }

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