/**
 * ESP8266 Weather Display with WiFiManager
 * 
 * This program uses an ESP8266 with MAX7219 LED matrix displays to show weather information.
 * It fetches weather data and current time from online APIs and displays them on the LED matrix.
 * 
 * Features:
 * - Uses WiFiManager for easy WiFi configuration via captive portal
 * - Displays current weather conditions, temperature, humidity, pressure, wind, etc.
 * - Shows current date and time
 * - Long-press the FLASH button (GPIO0) to reset WiFi settings
 * - Automatically reconnects if WiFi connection is lost
 * - Uses scrolling text and animations to display information
 * 
 * Hardware:
 * - ESP8266 NodeMCU or similar NodeMcu (ESP-12E, ESP version 2.7.4)
 * - MAX7219 LED matrix displays (4 units daisy-chained)
 * - Connections:
 *   - MAX7219 CLK to D5
 *   - MAX7219 DATA to D7
 *   - MAX7219 CS to D8
 * 
 * External dependencies:
 * - ESP8266WiFi
 * - ArduinoJson
 * - ESP8266HTTPClient
 * - MD_MAX72xx
 * - WiFiManager
 * - SPI
 * 
 * APIs used:
 * - OpenWeatherMap for weather data
 * - WorldClockAPI for date and time
 * 
 * Created: February 2025
 */
#include <ESP8266WiFi.h>
#include <WiFiManager.h> 
#include <ArduinoJson.h>        // JSON decoding library
#include <ESP8266HTTPClient.h>  // http web access library
#include <MD_MAX72xx.h>
#include <SPI.h>    
#include <WiFiClient.h>