Connect With WEP
Demonstrates how to connect to a network that is encrypted with WEP.
This example shows you how to connect to a WEP encrypted 802.11b/g network with the Arduino WiFi shield. Your Arduino Software (IDE) serial monitor will provide information about the connection once it has connected.
Hardware Required
- Arduino WiFi Shield 
- Shield-compatible Arduino board 
Circuit
The WiFi shield uses pins 10, 11, 12, and 13 for the SPI connection to the HDG104 module. Digital pin 4 is used to control the chip select pin on the SD card.
You should have access to a 802.11b/g wireless network that connects to the internet for this example. You will need to change the network settings in the sketch to correspond to your particular networks SSID.
WEP network passwords are hexadecimal strings known as keys. A WEP network can have 4 different keys; each key is assigned a "Key Index" value. For WEP encrypted networks, you need the SSID, the key, and key number.
image developed using Fritzing. For more circuit examples, see the Fritzing project page
In the above image, the Arduino would be stacked below the WiFi shield.
Code
1/*2
3 This example connects to a WEP-encrypted Wifi network.4
5 Then it prints the  MAC address of the Wifi shield,6
7 the IP address obtained, and other network details.8
9 If you use 40-bit WEP, you need a key that is 10 characters long,10
11 and the characters must be hexadecimal (0-9 or A-F).12
13 e.g.  for 40-bit, ABBADEAF01 will work, but ABBADEAF won't work14
15 (too short) and ABBAISDEAF won't work (I and S are not16
17 hexadecimal characters).18
19 For 128-bit, you need a string that is 26 characters long.20
21 D0D0DEADF00DABBADEAFBEADED will work because it's 26 characters,22
23 all in the 0-9, A-F range.24
25 Circuit:26
27 * WiFi shield attached28
29 created 13 July 201030
31 by dlf (Metodo2 srl)32
33 modified 31 May 201234
35 by Tom Igoe36
37 */38#include <SPI.h>39#include <WiFi.h>40
41char ssid[] = "yourNetwork";                     // your network SSID (name)42char key[] = "D0D0DEADF00DABBADEAFBEADED";       // your network key43int keyIndex = 0;                                // your network key Index number44int status = WL_IDLE_STATUS;                     // the Wifi radio's status45
46void setup() {47
48  //Initialize serial and wait for port to open:49
50  Serial.begin(9600);51
52  while (!Serial) {53
54    ; // wait for serial port to connect. Needed for native USB port only55
56  }57
58  // check for the presence of the shield:59
60  if (WiFi.status() == WL_NO_SHIELD) {61
62    Serial.println("WiFi shield not present");63
64    // don't continue:65
66    while (true);67
68  }69
70  String fv = WiFi.firmwareVersion();71
72  if (fv != "1.1.0") {73
74    Serial.println("Please upgrade the firmware");75
76  }77
78  // attempt to connect to Wifi network:79
80  while (status != WL_CONNECTED) {81
82    Serial.print("Attempting to connect to WEP network, SSID: ");83
84    Serial.println(ssid);85
86    status = WiFi.begin(ssid, keyIndex, key);87
88    // wait 10 seconds for connection:89
90    delay(10000);91
92  }93
94  // once you are connected :95
96  Serial.print("You're connected to the network");97
98  printCurrentNet();99
100  printWifiData();101}102
103void loop() {104
105  // check the network connection once every 10 seconds:106
107  delay(10000);108
109  printCurrentNet();110}111
112void printWifiData() {113
114  // print your WiFi shield's IP address:115
116  IPAddress ip = WiFi.localIP();117
118  Serial.print("IP Address: ");119
120  Serial.println(ip);121
122  Serial.println(ip);123
124  // print your MAC address:125
126  byte mac[6];127
128  WiFi.macAddress(mac);129
130  Serial.print("MAC address: ");131
132  Serial.print(mac[5], HEX);133
134  Serial.print(":");135
136  Serial.print(mac[4], HEX);137
138  Serial.print(":");139
140  Serial.print(mac[3], HEX);141
142  Serial.print(":");143
144  Serial.print(mac[2], HEX);145
146  Serial.print(":");147
148  Serial.print(mac[1], HEX);149
150  Serial.print(":");151
152  Serial.println(mac[0], HEX);153}154
155void printCurrentNet() {156
157  // print the SSID of the network you're attached to:158
159  Serial.print("SSID: ");160
161  Serial.println(WiFi.SSID());162
163  // print the MAC address of the router you're attached to:164
165  byte bssid[6];166
167  WiFi.BSSID(bssid);168
169  Serial.print("BSSID: ");170
171  Serial.print(bssid[5], HEX);172
173  Serial.print(":");174
175  Serial.print(bssid[4], HEX);176
177  Serial.print(":");178
179  Serial.print(bssid[3], HEX);180
181  Serial.print(":");182
183  Serial.print(bssid[2], HEX);184
185  Serial.print(":");186
187  Serial.print(bssid[1], HEX);188
189  Serial.print(":");190
191  Serial.println(bssid[0], HEX);192
193  // print the received signal strength:194
195  long rssi = WiFi.RSSI();196
197  Serial.print("signal strength (RSSI):");198
199  Serial.println(rssi);200
201  // print the encryption type:202
203  byte encryption = WiFi.encryptionType();204
205  Serial.print("Encryption Type:");206
207  Serial.println(encryption, HEX);208
209  Serial.println();210}Last revision 2018/08/23 by SM
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