Home Automation Using Facebook Chat And Arduino ESP8266 WiFi Module

As name suggest Middle-Ware, the role of this is to be a middle things, So basically this is a RESTful Web API application that has been written in .NET framework that keeps communicate with Facebook Graph API. So whenever any command comes to the Facebook page e.g. “RED BULB OFF“, “YELLOW BULB ON” etc. this RESTful API code will have that command, because from Arduino we are calling this middle-ware each second.

#include "SoftwareSerial.h"

String ssid = "YOUR_SSID";
String password = "YOUR_WIFI_PASSWORD";

SoftwareSerial esp(3, 2);// RX, TX

String server = "www.iotboys.com"//YOUR_MIDDLE_WARE Server Address;
String uri = "/api/FacebookAutomation/ProcessCommand";//MIDDLE WARE URI

int RED_BULB = 5;
int YELLOW_BULB = 6;

void setup() {

  pinMode(RED_BULB, OUTPUT);
  pinMode(YELLOW_BULB, OUTPUT);

  digitalWrite(RED_BULB, HIGH);
  digitalWrite(YELLOW_BULB, HIGH);
  esp.begin(9600);

  Serial.begin(9600);

  connectWifi();

  httpget();

  delay(1000);

}
void connectWifi() {

  String cmd = "AT+CWJAP=\"" + ssid + "\",\"" + password + "\"";

  esp.println(cmd);

  delay(4000);

  if (esp.find("OK")) {

    Serial.println("Connected!");

  }

  else {

    connectWifi();

    Serial.println("Cannot connect to wifi");
  }

}
/////////////////////////////GET METHOD///////////////////////////////

void httpget() {
  esp.println("AT+CIPSTART=\"TCP\",\"" + server + "\",80");//start a TCP connection.

  if ( esp.find("OK")) {

    Serial.println("TCP connection ready");

  } delay(1000);

  String getRequest =
    "GET " + uri + " HTTP/1.0\r\n" +
    "Host: " + server + "\r\n" +
    "Accept: *" + "/" + "*\r\n" +
    "Content-Type: application/json\r\n" +
    "\r\n";

  String sendCmd = "AT+CIPSEND=";//determine the number of caracters to be sent.

  esp.print(sendCmd);

  esp.println(getRequest.length() );

  delay(500);

  if (esp.find(">")) {
    Serial.println("Sending..");
    esp.print(getRequest);

    if ( esp.find("SEND OK")) {

      Serial.println("Packet sent");

      while (esp.available()) {

        String response = esp.readString();

        Serial.println(response);
       
        if (response.indexOf("RED BULB ON") > 0)
        {
          digitalWrite(RED_BULB, LOW);
        }
        else if (response.indexOf("RED BULB OFF") > 0)
        {
          digitalWrite(RED_BULB, HIGH);
        }
        else if (response.indexOf("YELLOW BULB ON") > 0)
        {
          digitalWrite(YELLOW_BULB, LOW);
        }
        else if (response.indexOf("YELLOW BULB OFF") > 0)
        {
          digitalWrite(YELLOW_BULB, HIGH);
        }
        else if (response.indexOf("ALL ON") > 0)
        {
          digitalWrite(RED_BULB, LOW);
          digitalWrite(YELLOW_BULB, LOW);
        }
        else if (response.indexOf("ALL OFF") > 0)
        {
          digitalWrite(RED_BULB, HIGH);
          digitalWrite(YELLOW_BULB, HIGH);
        }

      }
      // close the connection
      esp.println("AT+CIPCLOSE");

    }
  }
}

void loop() {
  httpget();
}