Home automation with google assistant and nodemcu

 






Code:


#include <ESP8266WiFi.h>

#include "Adafruit_MQTT.h"

#include "Adafruit_MQTT_Client.h"


#define Relay1            D1

#define Relay2            D2

#define Relay3            D3

#define Relay4            D4


#define WLAN_SSID       "Aish"             // Your SSID

#define WLAN_PASS       "1234567788"        // Your password


/************************* Adafruit.io Setup *********************************/


#define AIO_SERVER      "io.adafruit.com" //Adafruit Server

#define AIO_SERVERPORT  1883                   

#define AIO_USERNAME    "Pigirl"            // Username

#define AIO_KEY        ""   // Auth Key


//WIFI CLIENT

WiFiClient client;


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


Adafruit_MQTT_Subscribe Light1 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME"/feeds/Relay1"); // Feeds name should be same everywhere

Adafruit_MQTT_Subscribe Light2 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay2");

Adafruit_MQTT_Subscribe Light3 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay3");

Adafruit_MQTT_Subscribe Light4 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay4");


void MQTT_connect();


void setup() {

  Serial.begin(115200);


  pinMode(Relay1, OUTPUT);

  pinMode(Relay2, OUTPUT);

  pinMode(Relay3, OUTPUT);

  pinMode(Relay4, OUTPUT);

  

  // Connect to WiFi access point.

  Serial.println(); Serial.println();

  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());

 

  mqtt.subscribe(&Light1);

  mqtt.subscribe(&Light3);

  mqtt.subscribe(&Light2);

  mqtt.subscribe(&Light4);

}


void loop() {

 

  MQTT_connect();

  


  Adafruit_MQTT_Subscribe *subscription;

  while ((subscription = mqtt.readSubscription(20000))) {

    if (subscription == &Light1) {

      Serial.print(F("Got: "));

      Serial.println((char *)Light1.lastread);

      int Light1_State = atoi((char *)Light1.lastread);

      digitalWrite(Relay1, Light1_State);

      

    }

    if (subscription == &Light2) {

      Serial.print(F("Got: "));

      Serial.println((char *)Light2.lastread);

      int Light2_State = atoi((char *)Light2.lastread);

      digitalWrite(Relay2, Light2_State);

    }

    if (subscription == &Light3) {

      Serial.print(F("Got: "));

      Serial.println((char *)Light3.lastread);

      int Light3_State = atoi((char *)Light3.lastread);

      digitalWrite(Relay3, Light3_State);

    }

    if (subscription == &Light4) {

      Serial.print(F("Got: "));

      Serial.println((char *)Light4.lastread);

      int Light4_State = atoi((char *)Light4.lastread);

      digitalWrite(Relay4, Light4_State);

      

    }

  }


  

}


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!");

  

}


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