120 lines
2.7 KiB
C++
Executable file
120 lines
2.7 KiB
C++
Executable file
/*
|
|
|
|
This example prints the Wifi shield's MAC address, and
|
|
scans for available Wifi networks using the Wifi shield.
|
|
Every ten seconds, it scans again. It doesn't actually
|
|
connect to any network, so no encryption scheme is specified.
|
|
|
|
Circuit:
|
|
* WiFi shield attached
|
|
|
|
created 13 July 2010
|
|
by dlf (Metodo2 srl)
|
|
modified 21 Junn 2012
|
|
by Tom Igoe and Jaymes Dec
|
|
*/
|
|
|
|
|
|
#include <SPI.h>
|
|
#include <WiFi.h>
|
|
|
|
void setup() {
|
|
//Initialize serial and wait for port to open:
|
|
Serial.begin(9600);
|
|
while (!Serial) {
|
|
; // wait for serial port to connect. Needed for native USB port 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);
|
|
}
|
|
|
|
String fv = WiFi.firmwareVersion();
|
|
if (fv != "1.1.0") {
|
|
Serial.println("Please upgrade the firmware");
|
|
}
|
|
|
|
// Print WiFi MAC address:
|
|
printMacAddress();
|
|
}
|
|
|
|
void loop() {
|
|
// scan for existing networks:
|
|
Serial.println("Scanning available networks...");
|
|
listNetworks();
|
|
delay(10000);
|
|
}
|
|
|
|
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 **");
|
|
int numSsid = WiFi.scanNetworks();
|
|
if (numSsid == -1) {
|
|
Serial.println("Couldn't get a wifi connection");
|
|
while (true);
|
|
}
|
|
|
|
// print the list of networks seen:
|
|
Serial.print("number of available networks:");
|
|
Serial.println(numSsid);
|
|
|
|
// print the network number and name for each network found:
|
|
for (int thisNet = 0; thisNet < numSsid; thisNet++) {
|
|
Serial.print(thisNet);
|
|
Serial.print(") ");
|
|
Serial.print(WiFi.SSID(thisNet));
|
|
Serial.print("\tSignal: ");
|
|
Serial.print(WiFi.RSSI(thisNet));
|
|
Serial.print(" dBm");
|
|
Serial.print("\tEncryption: ");
|
|
printEncryptionType(WiFi.encryptionType(thisNet));
|
|
}
|
|
}
|
|
|
|
void printEncryptionType(int thisType) {
|
|
// read the encryption type and print out the name:
|
|
switch (thisType) {
|
|
case ENC_TYPE_WEP:
|
|
Serial.println("WEP");
|
|
break;
|
|
case ENC_TYPE_TKIP:
|
|
Serial.println("WPA");
|
|
break;
|
|
case ENC_TYPE_CCMP:
|
|
Serial.println("WPA2");
|
|
break;
|
|
case ENC_TYPE_NONE:
|
|
Serial.println("None");
|
|
break;
|
|
case ENC_TYPE_AUTO:
|
|
Serial.println("Auto");
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|