Adithya TG
Published © GPL3+

Alexa Based Smart Home Monitoring

You're at your Office and want to know about your home? Control your household devices and get alerts about home no matter wherever you are!

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Alexa Based Smart Home Monitoring

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
ESP8266 ESP-01
Espressif ESP8266 ESP-01
×1
DHT11 Temperature & Humidity Sensor (4 pins)
DHT11 Temperature & Humidity Sensor (4 pins)
×1
4-CHANNEL RELAY CONTROLLER FOR I2C
ControlEverything.com 4-CHANNEL RELAY CONTROLLER FOR I2C
×1
IR obstacle sensor
×1
camera
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE
Alexa Skills Kit
Amazon Alexa Alexa Skills Kit
Amazon Alexa echosim.io
ThingSpeak API
ThingSpeak API
Backendless
Pushingbox

Story

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Schematics

Circuit for uploading the code to ESP8266

Circuit Setup

Code

Smart_bell_ESP8266.ino

Arduino
Code for ESP8266 to get alert about intruder and guest
/*
 *  This sketch is implementation of smart bell and home security
 *
 */

#include <ESP8266WiFi.h>
#include<String.h>

//------------------------------------------
//       variables
//------------------------------------------
int intruder=0,guest=2;                     // pin 0 as intruder alert and pin2 as guest alert
const char* ssid     = "SSID";            //your SSID of WIFI
const char* password = "password";       // password of Wifi
//--------------------------------------------

const char* host = "api.thingspeak.com";

void setup() {
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  /* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
     would try to act as both a client and an access-point and could cause
     network-issues with your other WiFi-devices on your WiFi-network. */
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

int value = 0;
int x,y=0,z,k=0;
void loop() {
  delay(1000);
  ++value;

  Serial.print("connecting to ");
  Serial.println(host);
  
  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    return;
  }

  Serial.print("Requesting URL: ");
 //============================================================================================================
 //                                        intruder alert
 //============================================================================================================
 x=digitalRead(intruder);
//Serial.println(x);
  if(x==0)
  {
    y=0;
  }
  if(x==1&&y==0)
  {
    Serial.println("Sending Alert Pls Wait.....");
    delay(1000);
  String host1="api.pushingbox.com";
    client.print(String("GET ")  + "/pushingbox?devid=<deviceID_intruderAlert> HTTP/1.1\r\n" +
               "Host: " + host1 + "\r\n" + 
               "Connection: close\r\n\r\n");                       // executing pushing box api
    client.print(String("GET ")  + "/update?api_key=<write_key_intruderAlert>&field1=1 HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");                        //updating intruder notification
               
   
    delay(1000);
    y=1;
  } 

//============================================================================================================
//                                         End of intruder alert
//============================================================================================================
 //============================================================================================================
 //                                        guest alert
 //============================================================================================================
long t1;
 z=digitalRead(guest);
  if(z==0 && (millis()>=t1+300000)) // wait for 5 min to avoid multiple alert sending due to multiple door bell press
  {
    k=0;
  }
  if(x==1&&k==0)
  {
    t1=millis();         // storing curent time stamp in t1
    Serial.println("Sending Alert Pls Wait.....");
    delay(1000);                      //delay for sending alert and switch debouncing
  String host1="api.pushingbox.com";
    client.print(String("GET ")  + "/pushingbox?devid=<deviceID_guestAlert> HTTP/1.1\r\n" +
               "Host: " + host1 + "\r\n" + 
               "Connection: close\r\n\r\n");                       // executing pushing box api
    client.print(String("GET ")  + "/update?api_key=<write_key_guestAlert>&field1=1 HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");                        //updating guest notification
               
    delay(1000);
    k=1;
  } 

//============================================================================================================
//                                         End of guest alert
//============================================================================================================

  unsigned long timeout = millis();
  while (client.available() == 0) {
    if (millis() - timeout > 5000) {
      Serial.println(">>> Client Timeout !");
      client.stop();
      return;
    }
  }
 //Serial.println("closing connection");
}

Home_monitor_arduino.ino

Arduino
Code for Arduino to control appliances
//This sketch in the implementation of home automation 
#include <SoftwareSerial.h>// import the serial library
#include<String.h>
//-----------------------------------------
//    pin definations
//-----------------------------------------
#define Light 2              // pin 2 to control light
#define fan 3                 // pin 3 to control fan
//------------------------------------------
//       variables
//------------------------------------------
char e;
int p=0,q=0;        //these variables prevent switching ON/OFF of already turned ON/OFF devices

SoftwareSerial home_monitor(10, 11); // RX, TX

char control_data; // the data transmitted over Bluetooth

void setup() {
  // put your setup code here, to run once:
  home_monitor.begin(115200);
  Serial.begin(9600);
  pinMode(13,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (home_monitor.available()){
     control_data=home_monitor.read();   // getting control information from ESP8266 serially
     e=control_data;
     Serial.print(control_data);
 //============================================================================================================
 //                                        Device Control
 //============================================================================================================

 // Performing required operations based on the value of channel
    //-------------------------------------------------------------
    //                        LIGHT
    //-------------------------------------------------------------
    
    if(e=='0'&&p==0)         //Light ON            
    {
      digitalWrite(Light,LOW);
      p=1;
    }
     if(e=='1'&&p==1)        //Light off
    {
      digitalWrite(Light,HIGH);
      p=0;
    }
    
    //-------------------------------------------------------------
    //                        Heater
    //-------------------------------------------------------------
   
    if(e=='2'&&q==0)
    {
      digitalWrite(fan,HIGH);
      q=1;
    }
    if(e=='3'&&q==1)
    {
      digitalWrite(fan,LOW);
      q=0;
    }
  }
}

Home_Monitor_ESP8266.ino

Arduino
Code For ESP8266 to update humidity and temperature in thingspeak and also retrieve control information from thingspeak
/*
 * This sketch updates wheather information in thingspeak.com and also retrieve control information from thingspeak.com
 * It send the control information to arduino serially
 */

#include <ESP8266WiFi.h>
#include<String.h>
#include "DHT.h"        // including the library of DHT11 temperature and humidity sensor
#define DHTTYPE DHT11   // DHT 11

#define dht_dpin 2      // define GPIO2 as data input 
DHT dht(dht_dpin, DHTTYPE); 
//------------------------------------------
//       variables
//------------------------------------------
//dht DHT;
char c,e;                       // stores the bytes coming from the server

float temp,h;                   //stores float value of temp and humididty
String humidity,temperature,line;    //stores string value of temp and humididty
int co=0;                       //control the sending of Alert

const char* ssid     = "SSID";            //your SSID of WIFI
const char* password = "password";       // password of Wifi
//--------------------------------------------

const char* host = "api.thingspeak.com";

void setup() {
  dht.begin();
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  /* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
     would try to act as both a client and an access-point and could cause
     network-issues with your other WiFi-devices on your WiFi-network. */
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

int value = 0;

void loop() {
  delay(1000);
  ++value;

  Serial.print("connecting to ");
  Serial.println(host);
  
  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    return;
  }

  Serial.print("Requesting URL: ");
 //============================================================================================================
 //                                        Mini Weather Station
 //============================================================================================================
  h = dht.readHumidity();                    //reads humidity and temperature
  temp = dht.readTemperature();
  if(temp<50.0)
  {
    co=0;
  }
  if(temp>=50.0&&co==0)      // send alert if temperature is above 50 degrees and co is used to avoid multiple alert sending
  {
    Serial.println("Sending Alert please wait.......");
    delay(1000);
    String host1="api.pushingbox.com";
    client.print(String("GET ")  + "/pushingbox?devid=<deviceID_fireAlert> HTTP/1.1\r\n" +
               "Host: " + host1 + "\r\n" + 
               "Connection: close\r\n\r\n");           //pushingbox api to send alert 
    delay(1000);
     client.print(String("GET ")  + "/update?key=<write_key_fireAlert>&field1=1 HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");           //updating thingspeak fire alert channel
    co=1;
  }
  humidity=String(h);
  temperature=String(temp); 
  Serial.println(h);
  Serial.println(temp);   
  client.print(String("GET ")  + "/update?key=<write_key_humidity>&field1="+humidity+" HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");                                                         //update humidity in thingspeak channel
  client.print(String("GET ")  + "/update?key=<write_key_temperature>&field1="+temperature+" HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");                                                         ////update temperature in thingspeak channel      

//============================================================================================================
//                                         End of Weather Station
//============================================================================================================
//============================================================================================================
//                                Sending Control info to arduino Serially
//============================================================================================================
  // This will send the request to the server
  client.print(String("GET ")  + "/channels/<channelID_control>/field/field1/last.html HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");         // get information about device control
  unsigned long timeout = millis();
  while (client.available() == 0) {
    if (millis() - timeout > 5000) {
      Serial.println(">>> Client Timeout !");
      client.stop();
      return;
    }
  }
  
  // Read all the lines of the reply from server and print them to Serial
  while(client.available()){
    String line = client.readStringUntil('\r');
  }
  Serial.print(line);                         // received by arduino serially
 //Serial.println("closing connection");
}

Credits

Adithya TG

Adithya TG

3 projects • 65 followers
Passionate Electronics and communication engineering, IOT, MicroControllers.

Comments

Related channels and tags
  • Amazon Alexa
  • Arduino
  • ControlEverything.com
  • Espressif
  • Home Automation
  • Internet of Things
  • Security
  • ThingSpeak
  • Voice