Arduino WiFI Shield Manual page 6

- 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.
Scan for available networks
The sketch below is a good one to run the first time you use the board in a new area. This sketch will
not connect to a network, but it will show you what networks the shield can view. Your WiFi shield
will probably not see as many networks as a computer with a larger WiFi antenna. Once you have
downloaded the sketch to your Arduino, open the serial port to see available networks.
#include <SPI.h>
#include <WiFi.h>
void setup() {
// initialize serial and wait for the port to open:
Serial.begin(9600);
while(!Serial) ;
// attempt to connect using WEP encryption:
Serial.println("Initializing
printMacAddress();
// scan for existing networks:
Serial.println("Scanning available
listNetworks();
}
void loop() {
delay(10000);
// scan for existing networks:
Serial.println("Scanning available
listNetworks();
}
void printMacAddress() {
// the MAC address of your Wifi shield
byte mac[6];
// print your MAC address:
WiFi.macAddress(mac);
Serial.print("MAC:
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 listNetworks() {
// scan for nearby networks:
Serial.println("** Scan Networks
byte numSsid = WiFi.scanNetworks();
// print the list of networks seen:
Serial.print("number of available
Serial.println(numSsid);
// print the network number and name for each network found:
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
Serial.print(thisNet);
Wifi...");
networks...");
networks...");
");
**");
networks:");