/*
  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 <SoftwareSerial.h>
#include <DHT.h>
#include<ESP8266WiFi.h> 

 
//RX pino 2, TX pino 3
/*
 * Adaptador      Arduino
 *    RX      ->   3(TX)
 *    TX      ->   2(RX)
 */

SoftwareSerial esp8266(2, 3);
 
#define DEBUG true
 
#define DHTPIN 3
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

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

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


  Serial.println("Lista de redes");
  sendData("AT+CWLAP\r\n", 2000, DEBUG);
  delay(1000);

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

  // Mostrar o endereco IP ...
  Serial.println("Mostrar endereço IP");
  sendData("AT+CIFSR\r\n", 1000, DEBUG);

  Serial.println();
  Serial.println("** Final **");
}
 
void loop() {
  delay(1000);
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  Serial.print("Umidade: ");
  Serial.print(h);
  Serial.print("% - Temperatura: ");
  Serial.print(t);
  Serial.print("C");
  Serial.println();
}
 

 
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;
}