ScanNetworksAdvanced.ino

/*

  This example  prints the WiFi 101 Shield or MKR1000 MAC address, and
  scans for available WiFi networks using the WiFi 101 Shield or MKR1000 board.
  Every ten seconds, it scans again. It doesn't actually
  connect to any network, so no encryption scheme is specified.
  BSSID and WiFi channel are printed

  Circuit:
   WiFi 101 Shield attached or MKR1000 board

  This example is based on ScanNetworks

  created 1 Mar 2017
  by Arturo Guadalupi
*/


#include <SPI.h>
#include <WiFi101_Generic.h>      // https://github.com/khoih-prog/WiFi101_Generic

void setup()
{
  //Initialize serial and wait for port to open:
  Serial.begin(115200);

  while (!Serial && millis() < 5000);

  delay(500);

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD)
  {
    Serial.println("WiFi 101 Shield not present");

    // don't continue:
    while (true);
  }

  // print your MAC address:
  byte mac[6];
  WiFi.macAddress(mac);
  Serial.print("MAC: ");
  printMacAddress(mac);

  // scan for existing networks:
  Serial.println();
  Serial.println("Scanning available networks...");
  listNetworks();
}

void loop()
{
  delay(10000);
  // scan for existing networks:
  Serial.println("Scanning available networks...");
  listNetworks();
}

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 + 1);
    Serial.print(") ");
    Serial.print("Signal: ");
    Serial.print(WiFi.RSSI(thisNet));
    Serial.print(" dBm");
    Serial.print("\tChannel: ");
    Serial.print(WiFi.channel(thisNet));
    byte bssid[6];
    Serial.print("\t\tBSSID: ");
    printMacAddress(WiFi.BSSID(thisNet, bssid));
    Serial.print("\tEncryption: ");
    printEncryptionType(WiFi.encryptionType(thisNet));
    Serial.print("\t\tSSID: ");
    Serial.println(WiFi.SSID(thisNet));
    Serial.flush();
  }

  Serial.println();
}

void printEncryptionType(int thisType)
{
  // read the encryption type and print out the name:
  switch (thisType)
  {
    case ENC_TYPE_WEP:
      Serial.print("WEP");
      break;

    case ENC_TYPE_TKIP:
      Serial.print("WPA");
      break;

    case ENC_TYPE_CCMP:
      Serial.print("WPA2");
      break;

    case ENC_TYPE_NONE:
      Serial.print("None");
      break;

    case ENC_TYPE_AUTO:
      Serial.print("Auto");
      break;
  }
}

void print2Digits(byte thisByte)
{
  if (thisByte < 0xF)
  {
    Serial.print("0");
  }

  Serial.print(thisByte, HEX);
}

void printMacAddress(byte mac[])
{
  for (int i = 5; i >= 0; i--)
  {
    if (mac[i] < 16)
    {
      Serial.print("0");
    }

    Serial.print(mac[i], HEX);

    if (i > 0)
    {
      Serial.print(":");
    }
  }

  Serial.println();
}