Sanket patel
Published © GPL3+

Alexa NodeMCU Smart Home Automation With Your Own HUB

In this project you can make your own personal Smart Home HUB through which you can add, modify and control all the appliances you want.

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Alexa NodeMCU Smart Home Automation With Your Own HUB

Things used in this project

Hardware components

Raspberry Pi 3 Model B
Raspberry Pi 3 Model B
×1
Echo Dot
Amazon Alexa Echo Dot
×1
NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1

Story

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Code

Arduino code

C/C++
/*
 * Title: Home Automation
 * Description : Nodemcu Alexa Smart Switch
 */
#include <ESP8266WiFi.h>
#include <MQTTClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <ESP8266HTTPUpdateServer.h>

/* >>WiFi Setting<< */
const char* ssid = "SSID";
const char* password = "PASSWORD";

/* >>YOUR HUB <<*/
// Host Name
const char* host = "SmartHomeSystem";
// This is Not Neccessary to change 
const char* update_path = "/firmware";
// Username to access the openhab web page(your openhab username)
const char* update_username = "############";
// Password to access the openhab page(your openhab password)
const char* update_password = "###########";

/* >>MQTT<< */
// Topic which listens for commands
char* subscribeTopic = "Home-Automation/utilities/SmartHomeSystem"; 
//MQTT Server IP Address
const char* server = "RaspberryPi IP Address";
//Unique device ID 
const char* mqttDeviceID = "SmartHomeDevice";

/* >>Nodemcu pins to relay which will act as Smart Switch << */
int channel1 = 14;
int channel2 = 12;
int channel3 = 13;

/* >> No  need to change further<< */
//webserver 
ESP8266WebServer httpServer(80);
ESP8266HTTPUpdateServer httpUpdater;

//MQTT
WiFiClient net;
MQTTClient client;

unsigned long lastMillis = 0;

//Connect to WiFI and MQTT
void connect();

//Setup pins, wifi, webserver and MQTT
void setup() 
{
  // set pin modes
  pinMode(channel1, OUTPUT);
  digitalWrite(channel1, LOW);

  pinMode(channel2, OUTPUT);
  digitalWrite(channel2, LOW);

  pinMode(channel3, OUTPUT);
  digitalWrite(channel3, LOW);

  WiFi.mode(WIFI_STA);
  
  WiFi.begin(ssid, password);
  client.begin(server, net);
  client.onMessage(messageReceived);

  connect();

  MDNS.begin(host);

  httpUpdater.setup(&httpServer, update_path, update_username, update_password);
  httpServer.begin();

  MDNS.addService("http", "tcp", 80);
}

//Connect to wifi and MQTT
void connect() 
{
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(1000);
  }

  while (!client.connect(mqttDeviceID)) 
  {
    delay(1000);
  }

  client.subscribe(subscribeTopic);
}

void loop() 
{
  // MQTT Loop
  client.loop();
  delay(10);

  // Make sure device is connected
  if(!client.connected()) 
  {
    connect();
  }

  httpServer.handleClient();

}

// Change the state of a relay based on the MQTT Message
void messageReceived(String &topic, String &payload) 
{
    String msgString = payload;

  if (msgString == "1ON")
  {
    digitalWrite(channel1, HIGH);
    delay(250);
  }
  else if (msgString == "1OFF")
  {
    digitalWrite(channel1, LOW);
    delay(250);
  }
  else if (msgString == "2ON")
  {
    digitalWrite(channel2, HIGH);
    delay(250);
  }
  else if (msgString == "2OFF")
  {
    digitalWrite(channel2, LOW);
    delay(250);
  }
  else if (msgString == "3ON")
  {
    digitalWrite(channel3, HIGH);
    delay(250);
  }
  else if (msgString == "3OFF")
  {
    digitalWrite(channel3, LOW);
    delay(250);
  }
}

Credits

Sanket patel

Sanket patel

1 project • 10 followers

Comments

Related channels and tags
  • Amazon Alexa
  • Espressif
  • Home Automation
  • NodeMCU
  • Raspberry Pi