WiFiWebClient_WiFiMulti.ino

/****************************************************************************************************************************
  WiFiWebClient.ino

  This sketch connects to a website (http://www.google.com)
  using the WiFi module.

  This example is written for a network using WPA encryption. For
  WEP or WPA, change the Wifi.begin() call accordingly.

  This example is written for a network using WPA encryption. For
  WEP or WPA, change the Wifi.begin() call accordingly.

  Circuit:
   Board with NINA module (Arduino MKR WiFi 1010, MKR VIDOR 4000 and UNO WiFi Rev.2)

  created 13 July 2010
  by dlf (Metodo2 srl)
  modified 31 May 2012
  by Tom Igoe

  Based on and modified from WiFiNINA library https://www.arduino.cc/en/Reference/WiFiNINA
  to support nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, etc. boards besides Nano-33 IoT, MKRWIFI1010, MKRVIDOR400, etc.

  Built by Khoi Hoang https://github.com/khoih-prog/WiFiNINA_Generic
  Licensed under MIT license

  Copyright (c) 2018 Arduino SA. All rights reserved.
  Copyright (c) 2011-2014 Arduino LLC.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*****************************************************************************************************************************/

#include "defines.h"
#include "arduino_secrets.h"

// To eliminate FW warning when using not latest nina-fw version
// To use whenever WiFi101-FirmwareUpdater-Plugin is not sync'ed with nina-fw version
#define WIFI_FIRMWARE_LATEST_VERSION        "1.4.8"

#define USE_WIFI_NINA         true
#define USE_WIFI101           false
#define USE_WIFI_CUSTOM       false

#include <SPI.h>
#include <WiFiMulti_Generic.h>
#include <WiFiNINA_Generic.h>

int keyIndex = 0;                 // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;

// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
char server[] = "arduino.tips";

// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
WiFiClient client;

WiFiMulti_Generic wifiMulti;

void heartBeatPrint()
{
  static int num = 1;

  //WFM_LOGDEBUG1("\nWiFi connected, RSSI:", WiFi.RSSI());

  if (WiFi.status() == WL_CONNECTED)
    Serial.print(F("H"));        // H means connected to WiFi
  else
    Serial.print(F("F"));        // F means not connected to WiFi

  if (num == 80)
  {
    Serial.println();
    num = 1;
  }
  else if (num++ % 10 == 0)
  {
    Serial.print(F(" "));
  }
}

uint8_t connectMultiWiFi()
{
  // For general board, this better be 1000 to enable connect the 1st time
#define WIFI_MULTI_1ST_CONNECT_WAITING_MS             1000L

#define WIFI_MULTI_CONNECT_WAITING_MS                   500L

  Serial.println("WiFi lost. Trying to scan and reconnect");

  WiFi.disconnect();

  int i = 0;

  uint8_t status = wifiMulti.run();

  delay(WIFI_MULTI_1ST_CONNECT_WAITING_MS);

  while ( ( i++ < 20 ) && ( status != WL_CONNECTED ) )
  {
    status = WiFi.status();

    if ( status == WL_CONNECTED )
      break;
    else
      delay(WIFI_MULTI_CONNECT_WAITING_MS);
  }

  if ( status == WL_CONNECTED )
  {
    WFM_LOGERROR1(F("WiFi connected after time: "), i);
    WFM_LOGERROR3(F("SSID:"), WiFi.SSID(), F(",RSSI="), WiFi.RSSI());
    WFM_LOGERROR1(F("IP address:"), WiFi.localIP() );
  }
  else
  {
    WFM_LOGERROR(F("WiFi not connected"));

    if (wifiMulti.run() != WL_CONNECTED)
    {
      Serial.println("WiFi not connected!");
      delay(1000);
    }
  }

  return status;
}

void check_WiFi()
{
  if ( (WiFi.status() != WL_CONNECTED) )
  {
    Serial.println(F("\nWiFi lost. Call connectMultiWiFi in loop"));
    connectMultiWiFi();
  }
}

void check_status()
{
  static uint32_t checkstatus_timeout  = 0;
  static uint32_t checkwifi_timeout    = 0;

  static uint32_t current_millis;

#define WIFICHECK_INTERVAL    1000L
#define HEARTBEAT_INTERVAL    10000L

  current_millis = millis();

  // Check WiFi every WIFICHECK_INTERVAL (1) seconds.
  if ((current_millis > checkwifi_timeout) || (checkwifi_timeout == 0))
  {
    check_WiFi();
    checkwifi_timeout = current_millis + WIFICHECK_INTERVAL;
  }

  // Print hearbeat every HEARTBEAT_INTERVAL (10) seconds.
  if ((current_millis > checkstatus_timeout) || (checkstatus_timeout == 0))
  {
    heartBeatPrint();
    checkstatus_timeout = current_millis + HEARTBEAT_INTERVAL;
  }
}

void printWiFiStatus()
{
  // print the SSID of the network you're attached to:
  Serial.print(F("SSID: "));
  Serial.println(WiFi.SSID());

  // print your board's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print(F("IP Address: "));
  Serial.println(ip);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print(F("Signal strength (RSSI):"));
  Serial.print(rssi);
  Serial.println(F(" dBm"));
}

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

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

  Serial.print(F("\nStart WiFiWebClient on "));
  Serial.println(BOARD_NAME);
  Serial.println(WIFIMULTI_GENERIC_VERSION);
  Serial.println(WIFININA_GENERIC_VERSION);

  // check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE)
  {
    Serial.println(F("Communication with WiFi module failed!"));

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

  String fv = WiFi.firmwareVersion();

  if (fv < WIFI_FIRMWARE_LATEST_VERSION)
  {
    Serial.print(F("Your current firmware NINA FW v"));
    Serial.println(fv);
    Serial.print(F("Please upgrade the firmware to NINA FW v"));
    Serial.println(WIFI_FIRMWARE_LATEST_VERSION);
  }

  wifiMulti.addAP(SECRET_SSID1, SECRET_PASS1);
  wifiMulti.addAP(SECRET_SSID2, SECRET_PASS2);
  wifiMulti.addAP("ssid_from_AP_3", "your_password_for_AP_3");
  wifiMulti.addAP("ssid_from_AP_4", "your_password_for_AP_4");

  Serial.println("Connecting WiFi...");

  if (wifiMulti.run() == WL_CONNECTED)
  {
    Serial.print("\nWiFi connected, IP address: ");
    Serial.println(WiFi.localIP());
  }

  Serial.println(F("Connected to WiFi"));
  printWiFiStatus();

  Serial.println(F("\nStarting connection to server..."));

  // if you get a connection, report back via serial:
  if (client.connect(server, 80))
  {
    Serial.println(F("Connected to server"));
    // Make a HTTP request:
    client.println(F("GET /asciilogo.txt HTTP/1.1"));
    client.println("Host: arduino.tips");
    client.println("Connection: close");
    client.println();
  }
}

void loop()
{
  check_status();

  // if there are incoming bytes available
  // from the server, read them and print them:
  while (client.available())
  {
    char c = client.read();
    Serial.write(c);
  }
}