/*

https://ikkholis27.wordpress.com/2020/06/01/arduino-with-esp01-esp8266-wifi-module-webclient-for-internet-of-things-tutorial/

  AT Firmware simulation example

  Use the serial monitor to interface with the AT firmware. For instance, to scan for WiFi:

AT+CWMODE=1
AT+CWLAP

  Connect to WiFi:

AT+CWJAP="Wokwi-GUEST",

  Show the current IP address:

AT+CIFSR

  Show firmware version

AT+GMR

  To show list list of available commands:

AT+CMD?

AT
AT+CWMODE=1
AT+CWLAP
AT+CWJAP="Wokwi-GUEST",
AT+CIFSR
AT+CIPMUX=1
AT+CIPSERVER=1,80

*/

//Programa: Comandos AT com ESP8266
//Guia do Usuario do ESP8266

#include "WiFiEsp.h" 
#include <SoftwareSerial.h>
 
//RX pino 2, TX pino 3
/*
 * Adaptador      Arduino
 *    RX      ->   3(TX)
 *    TX      ->   2(RX)
 */

SoftwareSerial esp8266(2, 3);
 
#define DEBUG true

int status = WL_IDLE_STATUS;     // the Wifi radio's status

char server[] = "disciplinasfatec.000webhostapp.com";

WiFiEspClient client;

void setup() {
  Serial.begin(9600);
  esp8266.begin(115200); // baud rate padrão do ESP8266
  Serial.println("** Verificando conexao **");
  Serial.println();
  delay(1000);

  // Reinicializar parametros ...
  sendData("AT\r\n", 2000, DEBUG); // rst
  delay(1000);
  
  // Ativar mode de operação para estação ...
  sendData("AT+CWMODE=1\r\n", 1000, DEBUG);
  delay(1000);

  // Conectar a rede wireless ...
  sendData("AT+CWJAP=\"Wokwi-GUEST\",\r\n", 2000, DEBUG);
  delay(3000);

  // Mostrar o endereco IP ...
  sendData("AT+CIFSR\r\n", 1000, DEBUG);
  //sendData("AT+CWLIF\r\n", 1000, DEBUG);
  delay(3000);

  Serial.println();
  Serial.println("** Final **");

  // you're connected now, so print out the data
  Serial.println("You're connected to the network");
  
  Serial.println();
  Serial.println("Starting connection to server...");
  // if you get a connection, report back via serial
  if (client.connect(server, 80)) {
    delay(3000);
    Serial.println("Connected to server");
    // Make a HTTP request
    client.println("GET /gerador_trafego.txt HTTP/1.1");
    client.println("Host: disciplinasfatec.000webhostapp.com");
    client.println();
  }
  
}
 
void loop() { 
/*
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }

  // if the server's disconnected, stop the client
  if (!client.connected()) {
    Serial.println();
    Serial.println("Disconnecting from server...");
    client.stop();

    // do nothing forevermore
    while (true);
  }
*/
}

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

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

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

 
String sendData(String command, const int timeout, boolean debug)
{
  // Envio dos comandos AT para o modulo
  String response = "";
  esp8266.print(command);
  long int time = millis();
  while ( (time + timeout) > millis())
  {
    while (esp8266.available())
    {
      // The esp has data so display its output to the serial window
      char c = esp8266.read(); // read the next character.
      response += c;
    }
  }
  if (debug)
  {
    Serial.println(response);
  }
  return response;
}