IoT Switch | Blynk (ESP 32)

This project is used to turn on/off the leds or home appliances through internet from any part of the world.  

FOR VIDEO :   

THINGS NEEDED

1. ESP 32
2. 1K Resistor
3. LED'S
4. BreadBoard
5. Jumper Wire's

CIRCUIT DIAGRAM

WIRING

LED'S TO ESP32

• Connect the LED which you want to adjust the brightness to D2 (GPIO 2) of ESP32.
• Connect LED 1 to D5 (GPIO 5) of ESP32.
• Connect LED 2 to D18 (GPIO 18) of ESP32.
• Connect LED 3 to D 19 (GPIO 19) of ESP32.
• Connect LED 4 to D 21 (GPIO 21) of ESP32.

IN BLYNK

CODE

 

#include <WiFi.h>

#include <WiFiClient.h>

#include <BlynkSimpleEsp32.h>

BlynkTimer timer;

// OUTPUT PIN'S

#define led1 5

#define led2 18

#define led3 19

#define led4 21

// PWM PIN

#define led 2

// VARIABLE FOR PWM IN ESP32

const int freq = 5000;

const int ledChannel = 0;

const int resolution = 8;

// AUTHENTICATION TOKEN WHICH WILL BE SEND TO YOUR RESISTERED EMAIL ID 

char auth[] = "-----------------------";

// FOR ESP32 TO CONNECT TO ROUTER TO INTERNET

char ssid[] = "----------"; // WIFI NAME

char pass[] = "----------"; // WIFI PASSWORD

// BUTTON'S ON BLYNK APP

BLYNK_WRITE(V0)

{

  int pinValue = param.asInt(); 

  digitalWrite(led1, pinValue);

}

BLYNK_WRITE(V1)

{

  int pinValue = param.asInt();

  digitalWrite(led2, pinValue);

}

BLYNK_WRITE(V2)

{

  int pinValue = param.asInt();

  digitalWrite(led3, pinValue);

}

BLYNK_WRITE(V3)

{

  int pinValue = param.asInt();

  digitalWrite(led4, pinValue);

}

// SLIDER ON BLYNK

BLYNK_WRITE(V4)

{

  int pinValue = param.asInt();

 ledcWrite(ledChannel,pinValue);

}

void setup()

{

// SET PIN'S AS OUTPUT

  pinMode(led1 ,OUTPUT);

  pinMode(led2 ,OUTPUT);

  pinMode(led3 ,OUTPUT);

  pinMode(led4 ,OUTPUT);

  pinMode(led ,OUTPUT);  

  

  Serial.begin(9600); // BEGIN SERIAL COMMUNICATION

  WiFi.begin(ssid, pass); // ESP32 TO CONNECT TO YOUR WIFI

  Blynk.config(auth); // FOR CONNECT TO BLYNK SERVER

// FOR PWM

  ledcSetup(ledChannel, freq, resolution);

  ledcAttachPin(led, ledChannel);

}

void loop(){

      Blynk.run(); // TO START THE BLYNK SERVER TO COMMUNICATE WITH ESP32

}

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