119 lines
2.7 KiB
C++
Executable file
119 lines
2.7 KiB
C++
Executable file
/*
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This example prints the Wifi shield's MAC address, and
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scans for available Wifi networks using the Wifi shield.
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Every ten seconds, it scans again. It doesn't actually
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connect to any network, so no encryption scheme is specified.
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Circuit:
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* WiFi shield attached
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created 13 July 2010
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by dlf (Metodo2 srl)
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modified 21 Junn 2012
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by Tom Igoe and Jaymes Dec
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*/
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#include <SPI.h>
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#include <WiFi.h>
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void setup() {
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//Initialize serial and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for native USB port only
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}
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// check for the presence of the shield:
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue:
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while (true);
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}
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String fv = WiFi.firmwareVersion();
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if (fv != "1.1.0") {
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Serial.println("Please upgrade the firmware");
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}
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// Print WiFi MAC address:
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printMacAddress();
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}
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void loop() {
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// scan for existing networks:
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Serial.println("Scanning available networks...");
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listNetworks();
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delay(10000);
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}
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void printMacAddress() {
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// the MAC address of your Wifi shield
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byte mac[6];
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// print your MAC address:
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WiFi.macAddress(mac);
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Serial.print("MAC: ");
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Serial.print(mac[5], HEX);
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Serial.print(":");
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Serial.print(mac[4], HEX);
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Serial.print(":");
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Serial.print(mac[3], HEX);
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Serial.print(":");
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Serial.print(mac[2], HEX);
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Serial.print(":");
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Serial.print(mac[1], HEX);
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Serial.print(":");
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Serial.println(mac[0], HEX);
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}
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void listNetworks() {
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// scan for nearby networks:
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Serial.println("** Scan Networks **");
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int numSsid = WiFi.scanNetworks();
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if (numSsid == -1) {
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Serial.println("Couldn't get a wifi connection");
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while (true);
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}
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// print the list of networks seen:
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Serial.print("number of available networks:");
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Serial.println(numSsid);
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// print the network number and name for each network found:
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for (int thisNet = 0; thisNet < numSsid; thisNet++) {
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Serial.print(thisNet);
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Serial.print(") ");
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Serial.print(WiFi.SSID(thisNet));
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Serial.print("\tSignal: ");
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Serial.print(WiFi.RSSI(thisNet));
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Serial.print(" dBm");
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Serial.print("\tEncryption: ");
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printEncryptionType(WiFi.encryptionType(thisNet));
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}
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}
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void printEncryptionType(int thisType) {
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// read the encryption type and print out the name:
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switch (thisType) {
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case ENC_TYPE_WEP:
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Serial.println("WEP");
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break;
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case ENC_TYPE_TKIP:
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Serial.println("WPA");
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break;
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case ENC_TYPE_CCMP:
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Serial.println("WPA2");
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break;
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case ENC_TYPE_NONE:
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Serial.println("None");
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break;
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case ENC_TYPE_AUTO:
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Serial.println("Auto");
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break;
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}
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}
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