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#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>
 
#include <ArduinoOTA.h>
#include <ESP8266mDNS.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
 
// Helps with connecting to internet
#include <WiFiManager.h>
 
// HOSTNAME for OTA update
#define HOSTNAME "ESP8266-OTA-"
 
void configModeCallback (WiFiManager *myWiFiManager);
 
void setup(void) {
 
//ESP.wdtDisable();                               // used to debug, disable wachdog timer, 
  Serial.begin(115200);                           // full speed to monitor
                               
 
    //WiFiManager
  //Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;
  // Uncomment for testing wifi manager
  // wifiManager.resetSettings();
  wifiManager.setAPCallback(configModeCallback);
 
  //or use this for auto generated name ESP + ChipID
  wifiManager.autoConnect();
 
  // OTA Setup
  String hostname(HOSTNAME);
  hostname += String(ESP.getChipId(), HEX);
  WiFi.hostname(hostname);
  ArduinoOTA.setHostname((const char *)hostname.c_str());
  ArduinoOTA.begin();
  
  while (WiFi.status() != WL_CONNECTED) {         // Wait for connection
    delay(500);
    Serial.print(".");
  }
  
    // Set up the endpoints for HTTP server,  Endpoints can be written as inline functions:
  server.on("/", []() {
    server.send(200, "text/html", form);
  });
  server.on("/msg", handle_msg);                  // And as regular external functions:
  server.begin();                                 // Start the server 
 
  char result[255];
  sprintf(result, "WebServer ready! Send Message using http://%1d.%1d.%1d.%1d", WiFi.localIP()[0], WiFi.localIP()[1], WiFi.localIP()[2], WiFi.localIP()[3]);
  Serial.println();
  Serial.println(result);
  Serial.println(WiFi.localIP());                 // Serial monitor prints localIP
 
}
 
// Called if WiFi has not been configured yet
void configModeCallback (WiFiManager *myWiFiManager) {
  Serial.println("Wifi Manager");
  Serial.println("Please connect to AP");
  Serial.println(myWiFiManager->getConfigPortalSSID());
  Serial.println("To setup Wifi Configuration");
}