Home Security System with ESP8266

//Necessary libraries for Adafruit Dashboard and ESP8266
#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"

//SSID and Password for Wifi
#define WLAN_SSID       "******"
#define WLAN_PASS       "*********"

//Adafruit Dashboard information(can be found under the "My Key" section of your dasboard)
#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  ****                   // use 8883 for SSL
#define AIO_USERNAME    "******" //Found on dashboard
#define AIO_KEY         "******" //Found on dashboard

WiFiClient client;

Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);

//These two lines are necessary to send data to Adafruit Dashboard
Adafruit_MQTT_Publish PIR = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/PIR Sensor");//PIR will be used for PIR Sensor(motion)
Adafruit_MQTT_Publish Reed = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Reed Switch");//Reed will be used for Reed Switch(door)

//Pin numbers for PIR Sensor(Sensor), Reed Switch(REED_PIN), and built-in led(LED_PIN)
int Sensor = 13;
const int REED_PIN = 12;
const int LED_PIN = 16; 

void MQTT_connect();

void setup() {
  // put your setup code here, to run once. I have defined all of my inputs and outputs here, and have also started my serial monitor along with WiFi Connectivity
  
  pinMode(Sensor, INPUT);
  pinMode(REED_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);

  Serial.print("Connecting to ");
  Serial.println(WLAN_SSID);

  WiFi.begin(WLAN_SSID, WLAN_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println();
  Serial.println("WiFi connected");
  Serial.println("IP address: "); Serial.println(WiFi.localIP());

}

uint32_t x = 0;

void loop() {
  //This loop contains the main part of our program - it will be run over and over again.
  MQTT_connect();
  Serial.print(F("\nSending MS data "));
  Serial.print(x);
  Serial.print("...");

  int result = digitalRead(Sensor);// Read the state of the PIR Sensor
  int sts = digitalRead(REED_PIN); // Read the state of the reed switch
  if (sts == LOW) // If the pin reads low, the switch is closed and thus the door is closed as well.
  {
    Serial.println("Door Closed");
    digitalWrite(LED_PIN, LOW); 

  }
  else //If the pin is not low, it is high, which means the switch and door are open
  {
    Serial.println("Door Open");
    Reed.publish("Door Open"); //Publish data to Adafruit Dashboard
    digitalWrite(LED_PIN, HIGH);
  }


  Serial.println(result);
  if (result == HIGH) { //If result it high, it means motion has been detected
    Serial.println("Motion detected"); 
    PIR.publish("Motion Detected");//Publish data to Adafruit Dashboard
  }
  else { //if result is not high, no motion is being detected
    Serial.println("No Motion Detected");
    delay(1000);
  }
}

//Function for necessary MQTT Connections
void MQTT_connect() {
  int8_t ret;


  if (mqtt.connected()) {
    return;
  }

  Serial.print("Connecting to MQTT... ");

  uint8_t retries = 3;
  while ((ret = mqtt.connect()) != 0) { 
    Serial.println(mqtt.connectErrorString(ret));
    Serial.println("Retrying MQTT connection in 5 seconds...");
    mqtt.disconnect();
    delay(5000); 
    retries--;
    if (retries == 0) {
      while (1);
    }
  }
  Serial.println("MQTT Connected!");
}