Code 6: //The demo code is Alexa control You can copy the code to your Arduino IDE
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;
}
