ESP8266 - There is list of saved wifi credentials, it tries to connect one by one to them until success - on next boot it remembers last network and try to connect first to it.. if unsucsefull look throw all list of saved networks

try connect to one of wifi saved networks.ino

struct WiFiCredential{
  const char *ssid;
  const char *pass;
};

bool wifiConnect()
{
  if(isWifiConnected())
    return true;
  WiFi.mode(WIFI_STA);

  if(wifiConnectToLastNetwork())
    return true;
    
  WiFiCredential savedWifiCredentials[] = {
    {"D","dan"},
    {"Kfer_net_7","lya456"},
    {"U326803","PDFG"},
    {"Ainra","cargoo"},
    {"Sucovi","eAAADD64fe"},
    {"U309010","RXYD"},
  };//The most prefereable at the end!

  Serial.print(E("Scanning available WiFinetworks.. Found: "));
  yield();
  uint8_t n = WiFi.scanNetworks();
  yield_debug();
  Serial.println(n);
  uint8_t c = SIZE_OF_LOACAL_ARRAY(savedWifiCredentials);
  while(--c)
  {
    if(WIFI_DEBUG) DEBUG_OUTPUT.print(sE("Searching for: ") + savedWifiCredentials[c].ssid);
    for (int i = 0; i < n; ++i)
    {
      if(WiFi.SSID(i) == savedWifiCredentials[c].ssid)
      {
        Serial.println(sE(" - Found!"));
        if(wifiConnectTo(savedWifiCredentials[c].ssid, savedWifiCredentials[c].pass))
          return true;
        else
          break;//for lopp
      }
      yield_debug();
    }
    Serial.println();
  }
  return false;
}



bool wifiConnectTo(char const* ssid, char const* pass)
{
  Serial.printf(cE("Wifi connecting to: %s..\n"), ssid);

  WiFi.begin(ssid, pass);
  uint8_t attempt = 200;
  while (--attempt)
  {
    delay(100);
    Serial.print(E("."));

    if(WiFi.status() == WL_CONNECTED)
      break; //Succesfully connected

    if(WiFi.status() == WL_CONNECT_FAILED)
      attempt = 1; //Falied to connect, attempt = 1 ends loop imediately
  }
  
  if(attempt)
    return true;

  Serial.println(sE("\n!!Warning: WIFi NOT connected to: ") + ssid + E(" because: ") + WiFi.status());
  return false;
}

bool isWifiConnected()
{
  yield_debug();
  if(WIFI_DEBUG) DEBUG_OUTPUT.printf(cE("Wifi status: (%d)"), WiFi.status());
  return (WiFi.status() == WL_CONNECTED);
}

bool wifiConnectToLastNetwork()
{
  Serial.print(sE("WiFi: trying to connect to last network: ") + WiFi.SSID());
  wifi_station_set_auto_connect(true);
  wifi_station_connect();
  WiFi.waitForConnectResult();

  if(isWifiConnected())
    return onWiFiSuccesfullyConnected();
  else
  Serial.println(E(" - Unsuccesfull!"));
  return false;
}