[Arduino demo source code for KC868-A4]-07 voice control by alexa speaker

Code:
#ifdef ARDUINO_ARCH_ESP32

#include <WiFi.h>

#else

#include <ESP8266WiFi.h>

#endif

#include <Espalexa.h>



#define Relay1 2

#define Relay2 15

#define Relay3 5

#define Relay4 4



// prototypes

boolean connectWifi();



//callback functions

void F1LightChanged(uint8_t brightness);

void F2LightChanged(uint8_t brightness);

void F3LightChanged(uint8_t brightness);

void F4LightChanged(uint8_t brightness);



// Change this!!



// WiFi Credentials

const char* ssid = "KinCony";           //input your router's SSID

const char* password = "a12345678";    // input your router's password



// device names

String Device_1_Name = "Yellow light";

String Device_2_Name = "Green light";

String Device_3_Name = "Blue light";

String Device_4_Name = "Red light";  





boolean wifiConnected = false;



Espalexa espalexa;



void setup()

{

  Serial.begin(115200);

  pinMode(Relay1, OUTPUT);

  pinMode(Relay1, LOW);



  pinMode(Relay2, OUTPUT);

  pinMode(Relay2, LOW);



  pinMode(Relay3, OUTPUT);

  pinMode(Relay3, LOW);



  pinMode(Relay4, OUTPUT);

  pinMode(Relay4, LOW);      



  // Initialise wifi connection

  wifiConnected = connectWifi();



  if (wifiConnected)

  {

    // Define your devices here.

          espalexa.addDevice(Device_1_Name,F1LightChanged);

          espalexa.addDevice(Device_2_Name,F2LightChanged);

          espalexa.addDevice(Device_3_Name,F3LightChanged);

          espalexa.addDevice(Device_4_Name,F4LightChanged);



    espalexa.begin();



  }



  else

  {

    while (1)

    {

      Serial.println("Cannot connect to WiFi. Please check data and reset the ESP.");

      delay(2500);

    }

  }



}



void loop()

{

  espalexa.loop();

  delay(1);

}



//our callback functions

void F1LightChanged(uint8_t brightness)

{

  //Control the device

  if (brightness)

  {

    if (brightness == 255)

    {

      digitalWrite(Relay1,HIGH);

    }



  }

  else

  {

   digitalWrite(Relay1, LOW);

  }

}



void F2LightChanged(uint8_t brightness)

{



  //Control the device 

  if (brightness)

  {

    if (brightness == 255)

    {

      digitalWrite(Relay2,HIGH);

    }



  }

  else

  {

   digitalWrite(Relay2,LOW);

  }

}



void F3LightChanged(uint8_t brightness)

{



  //Control the device  

  if (brightness)

  {

    if (brightness == 255)

    {

     digitalWrite(Relay3,HIGH);

    }

  }

  else

  {

     digitalWrite(Relay3,LOW);

  }

}



void F4LightChanged(uint8_t brightness)

{



  //Control the device 

  if (brightness)

  {

    if (brightness == 255)

    {

     digitalWrite(Relay4,HIGH);

    }

  }

  else

  {

    digitalWrite(Relay4,LOW);

  }

}







// connect to wifi – returns true if successful or false if not

boolean connectWifi()

{

  boolean state = true;

  int i = 0;



  WiFi.mode(WIFI_STA);

  WiFi.begin(ssid, password);



  // Wait for connection

  Serial.print("Connecting...");

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

    if (i > 20) {

      state = false; break;

    }

    i++;

  }

  Serial.println("");

  if (state) {

    Serial.print("Connected to ");

    Serial.println(ssid);

    Serial.print("IP address: ");

    Serial.println(WiFi.localIP());

  }

  else {

    Serial.println("Connection failed.");

  }

  return state;

}