/*************************************************************************************************
                                      PROGRAMMINFO
**************************************************************************************************
Funktion: WEB Server interne LED 25

**************************************************************************************************
Version: 18.10.2022
**************************************************************************************************
Board suchen im Boardmanager: megaavr

Board: Arduino UNO WIFI REV 2 // Arduino megaAVR BOARDS

Board  Name  Arduino® UNO WiFi Rev 2
SKU ABX00021
Microcontroller ATmega4809
USB connector USB-B
Pins  Built-in LED Pin  25
Digital I/O Pins  14
Analog input pins 6
PWM pins  5
Connectivity  Bluetooth®  Nina W102 uBlox module
Wi-Fi Nina W102 uBlox module
Secure element  ATECC608A
Sensors IMU LSM6DS3TR
Communication UART  Yes
I2C Yes
SPI Yes
Power I/O Voltage 5V
Input voltage (nominal) 6-20V
DC Current per I/O Pin  20 mA
Power Supply Connector  Barrel Plug
Clock speed Processor ATmega4809 16 MHz
Memory  ATmega4809  6KB SRAM, 48KB flash, 256 bytes EEPROM
Nina W102 uBlox module  448 KB ROM, 520KB SRAM, 2MB Flash
Dimensions  Weight  25 g
Width 53.4 mm
Length  68.6 mm
**************************************************************************************************
Beispiele:
https://docs.arduino.cc/built-in-examples/

https://docs.arduino.cc/hardware/uno-wifi-rev2

https://docs.arduino.cc/learn/

https://create.arduino.cc/projecthub/products/arduino-uno-wifi-rev-2

**************************************************************************************************
Libraries:
https://github.com/espressif/arduino-esp32/tree/master/libraries
C:\Users\User\Documents\Arduino
**************************************************************************************************
C++ Arduino IDE V1.8.19
**************************************************************************************************
Einstellungen:
https://dl.espressif.com/dl/package_esp32_index.json
http://dan.drown.org/stm32duino/package_STM32duino_index.json
http://arduino.esp8266.com/stable/package_esp8266com_index.json
**************************************************************************************************/

#include <WiFiNINA.h>

char ssid[] = "R2-D2";           //  SSID
char pass[] = "xxx";      //  Passwort
int keyIndex = 0;                
int status = WL_IDLE_STATUS;     
WiFiServer server(80);           

WiFiClient client = server.available();

int ledPin = 25; //Interne LED

void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  while (!Serial);
  
  enable_WiFi();
  connect_WiFi();

  server.begin();
  printWifiStatus();

}

void loop() {
  client = server.available();

  if (client) {
    printWEB();
  }
}

void printWifiStatus() {
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());


  IPAddress ip = WiFi.localIP();
  Serial.print("IP Addresse: ");
  Serial.println(ip);

  long rssi = WiFi.RSSI();
  Serial.print("Signal Stärke (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");

  Serial.print("Um diese Seite in Aktion zu sehen, öffne im Browser http://");
  Serial.println(ip);
}

void enable_WiFi() {
  // Check WiFI
  if (WiFi.status() == WL_NO_MODULE) {
    Serial.println("Kommunikation mit WiFi-Modul fehlgeschlagen!");
    while (true);
  }

  String fv = WiFi.firmwareVersion();
  if (fv < "1.0.0") {
    Serial.println("Bitte aktualisiere die Firmware");
  }
}

void connect_WiFi() {
  while (status != WL_CONNECTED) {
    Serial.print("Versuche eine Verbindung zur SSID herzustellen: ");
    Serial.println(ssid);
    status = WiFi.begin(ssid, pass);
    delay(10000);
  }
}

void printWEB() {

  if (client) {                           
    Serial.println("Neue Verbindung");        
    String currentLine = "";                
    while (client.connected()) {            
      if (client.available()) {             
        char c = client.read();             
        Serial.write(c);                    
        if (c == '\n') {                   


          if (currentLine.length() == 0) {


            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();
           

            client.print("Klicke <a href=\"/H\">hier</a> Schalte LED ein<br>");
            client.print("Klicke <a href=\"/L\">hier</a> Schalte LED aus<br><br>");;
            
            int randomReading = analogRead(A1);
            client.print("Zufaelliges Lesen vom analogen Pin: ");
            client.print(randomReading);

            client.println();

            break;
          }
          else {      
            currentLine = "";
          }
        }
        else if (c != '\r') {    
          currentLine += c;     
        }

        if (currentLine.endsWith("GET /H")) {
        digitalWrite(ledPin, HIGH);        
        }
        if (currentLine.endsWith("GET /L")) {
        digitalWrite(ledPin, LOW);       
        }

      }
    }

    client.stop();
    Serial.println("Verbindung abgebrochen");
  }
}