#include <SoftwareSerial.h> //Including the software serial library

#define DEBUG true SoftwareSerial esp8266(2,3); // This will make the Arduino pin 2 as the RX pin and Arduino pin 3 as the TX. Software UART /* So you have to connect the TX of the esp8266 to the pin 2 of the Arduino and the TX of the esp8266 to the pin 3 of the Arduino. This means that you need to connect the TX line from the esp to the Arduino's pin 2 */

void setup() { Serial.begin(9600); // Setting the baudrate to 9600

esp8266.begin(9600); // Set it according to your esp’s baudrate. Different esp’s have different baud rates.

pinMode(11,OUTPUT); // Setting the pin 11 as the output pin.

digitalWrite(11,LOW); // Making it low.

pinMode(12,OUTPUT); // Setting the pin 12 as the output pin..

digitalWrite(12,LOW); // Making pin 12 low.

pinMode(13,OUTPUT); // Setting the pin 13 as the output pin.

digitalWrite(13,LOW); // Making pin 13 low.

sendData("AT+RST\r\n",2000,DEBUG); //This command will reset module to default

sendData("AT+CWMODE=2\r\n",1000,DEBUG); // This will configure the mode as access point

sendData("AT+CIFSR\r\n",1000,DEBUG); // This will get ip address and will show it

sendData("AT+CIPMUX=1\r\n",1000,DEBUG); // This will configure the ESP8266 for multiple connections sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // This will set the server on port 80 }

void loop()

{

if(esp8266.available()) // Checking that whether the esp8266 is sending a message or not (Software UART Data)

{

if(esp8266.find("+IPD,")) { delay(1000); // Waiting for 1 sec

int connectionId = esp8266.read()-48; // Subtracting 48 from the character to get the number.

esp8266.find("pin="); // Advancing the cursor to the "pin="

int pinNumber = (esp8266.read()-48)*10; // Getting the first number which is pin 13

pinNumber += (esp8266.read()-48); // This will get the second number. For example, if the pin number is 13 then the 2nd number will be 3 and then add it to the first number

digitalWrite(pinNumber, !digitalRead(pinNumber)); // This will toggle the pin // The following commands will close the connection

String closeCommand = "AT+CIPCLOSE=";

closeCommand+=connectionId;

closeCommand+="\r\n"; sendData(closeCommand,1000,DEBUG); // Sending the data to the ESP8266 to close the command

}

}

}

String sendData(String command, const int timeout, boolean debug) // Function to send the data to the esp8266

{

String response = ""; esp8266.print(command); // Send the command to the ESP8266

long int time = millis();

while( (time+timeout) > millis()) // ESP8266 will wait for some time for the data to receive

{

while(esp8266.available()) // Checking whether ESP8266 has received the data or not

{

char c = esp8266.read(); // Read the next character. response+=c; // Storing the response from the ESP8266

}

}

if(debug)

{

Serial.print(response); // Printing the response of the ESP8266 on the serial monitor.

}

return response;

}