Published May 17, 2021 © GPL3+

Home Automation using Blynk IR Remote & ESP32 - IoT Projects

Make IoT-based Smart Home Automation Using Blynk & ESP32 to control an 8-channel relay module from the IR Remote, manual switch & Wi-Fi.

IntermediateFull instructions provided12 hours3,078

Home Automation using Blynk IR Remote & ESP32 - IoT Projects

Things used in this project

Hardware components

Espressif ESP32S

IR receiver (generic)

ControlEverything.com 4-CHANNEL RELAY CONTROLLER FOR I2C

Software apps and online services

Arduino IDE

Blynk

Hand tools and fabrication machines

Soldering iron (generic)

Story

In this IoT project, I have shown how to make IoT-based ESP32 Home Automation using Blynk, IR remote, and switches to control an 8-channel relay module with and without internet. If the internet is not available, then you can control the home appliances from IR remote & manual switches.

During the article, I have shown all the steps to make this home automation system.

Tutorial Video on Blynk ESP32 Smart Home System

This ESP32 control relay module has the following features:

Control home appliances with WiFi (Blynk App).
Control home appliances with IR Remote.
Control home appliances with manual switches.
Monitor real-time feedback in the Blynk App.
Control home appliances manually without internet from IR remote and switches.

If you don't want to use PCB then you can also make this IoT project just by using an 8-channel relay module, ESP32, and IR receiver sensor.

Circuit Diagram of the ESP32 Projects

This is the complete circuit diagram for this home automation project. I have explained the circuit in the tutorial video.

The circuit is very simple, I have used the GPIO pins D23, D22, D21, D19, D18, D5, D25 & D26 to control the 8 relays.

And the GPIO pins D13, D12, D14, D27, D33, D32, D15 & D4 are connected with Switches to control the 8 relays manually.

And the output pin of the IR Receiver is connected with GPIO D35.

I have used the INPUT_PULLUP function in Arduino IDE instead of using the pull-up resistors.

I have used a 5V 5A DC power supply.

Required Components:

1. ESP32 DEVKIT V1 board
2. 8-channel SPDT 5V Relay Module
3. TSOP1838 IR receiver
4. Manual Switches or Pushbuttons

Required Components for the PCB

1. Relays 5v (SPDT) (8 no)
2. BC547 Transistors (8 no)
3. PC817 Optocuplors (8 no)
4. 510-ohm 0.25-watt Resistor (8 no) (R1 - R8)
5. 1k 0.25-watt Resistors (10 no) (R9 - R18)
6. LED 5-mm (10 no)
7. 1N4007 Diodes (8 no) (D1 - D8)
8. Push Buttons (8 no)
9. Terminal Connectors
10. 5V DC supply

Required Software:

1. Arduino IDE
2. Blynk App

Control Relays With Internet Using Blynk

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If the ESP32 module is connected with the WiFi, then you can control the home appliances from Blynk App, IR remote, and switches.

In the first picture, I have used only the Relay module and ESP32. In the second picture, I have used the custom-designed PCB.

You can control and monitor real-time feedback from anywhere in the world with the Blynk App.

ESP32 Control Relay With IR Remote

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You can always control the relays from the IR remote. For this project, you can use any IR remote.

I will explain how to get the IR codes (HEX codes) from any remote in the following steps.

And if the ESP32 is connected with Wi-Fi, then you can also monitor the real-time feedback in the Blynk App.

In the first picture, I have used only the Relay module and ESP32. In the second picture, I have used the custom-designed PCB.

Control Relays Using Switches or Push-buttons

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You can also control the relays manually with switches or push buttons.

The ESP32 will check for the WiFi after every 3 seconds. When the WiFi is available, the ESP32 will automatically connect with the WiFi.

Configure the Blynk App for the ESP32

1. Install the Blynk App from the Google play store or App store. Then create an account and tap on the New Project.

2. Give the name to the project, select ESP32 Dev Board, Connection type will be Wi-Fi. Then tap on Create.

3. Blynk will send an authentication token to the registered email id. Tap on OK.

Add the Button Widgets in Blynk App

Then add 8 button widgets to control the 8 relays. Here I have used virtual pins V1, V2, V3, V4, V5, V6, V7, V8 for 8 buttons. And mode will be Switch.

I have explained all the details in the tutorial video.

Get the IR Codes (HEX Code) From Remote

Now, to get the HEX codes from the remote, first, we have to connect the IR receiver output pin with GPIO D35.

and give the 5V across the VCC and GND. The IR receiver must have a metallic casing, otherwise, you may face issues.

Download the code for getting the HEX codes

https://drive.google.com/file/d/1MLJ96CQN3wOuu6iWArsMq9rKsKR5Z3Xi/view?usp=sharing

Then follow the following steps to get the HEX codes

Install the IRremote library in Arduino IDE
Download the attached code, and upload it to ESP32.
Open Serial Monitor with Baud rate 9600.
Now, press the IR remote button. The respective HEX code will populate in the serial monitor.

Save all the HEX codes in a text file.

Codes for the Blynk ESP32 Home Automation

Download Code for this ESP32 Blynk home control with Switch (Latched)

https://drive.google.com/file/d/1rEALIDmBMSk7KCWGbDxtfokX7LsM8Ofg/view?usp=sharing

Download Code for this ESP32 Blynk home control with PushButton (Momentary)

https://drive.google.com/file/d/1nwRi9R3mkEK9RV8zuHrp4LUzdANfMAaL/view?usp=sharing

If you use switch (Latched), refer to the code for Switch, and please use the code for the push button for the momentary switch.

Download and install the following libraries in Arduino IDE

IRremote Library
AceButton Library
Blynk Library

I have shared the download link of all the libraries in the code.

Program the ESP32 With Arduino IDE

In the code enter the WiFi name, WiFi password & Blynk Auth Token.

Then update the HEX code in the ir_remote function as shown in the tutorial video.

After that, select the DOIT ESP32 DEVKIT V1 board and proper PORT.

Then upload the code to ESP32 Board.

While uploading the code to ESP32, if you see the "Connecting....___" text, then press the BOOT button of the ESP32.

Designing the PCB for ESP32 Projects

To make the circuit compact and give a professional look, I have designed the PCB after testing all the features of the smart relay module on the breadboard.

You can download the PCB Gerber file of this home automation project from the following link:

https://drive.google.com/uc?export=download&id=1Y8rXnczq6baxAKOrBEE8aro-uqcK0J93

Order the PCB

After downloading the Garber file you can easily order the PCB

1. Visit https://jlcpcb.com/RAB and Sign in / Sign up

2. Click on the QUOTE NOW button.

3. Click on the "Add your Gerber file" button. Then browse and select the Gerber file you have downloaded.

Uploading the Gerber File and Set the Parameters

4. Set the required parameter like Quantity, PCB masking color, etc.

5. After selecting all the Parameters for PCB click on SAVE TO CART button.

Select Shipping Address and Payment Mode

6. Type the Shipping Address.

7. Select the Shipping Method suitable for you.

8. Submit the order and proceed with the payment.

You can also track your order from the JLCPCB.com.

My PCBs took 2 days to get manufactured and arrived within a week using the DHL delivery option.

PCBs were well packed and the quality was really good at this affordable price.

Solder All the Components on PCB

After that, I have soldered all the components as per the circuit diagram.

Then connect the ESP32 board with PCB.

Connect the Home Appliances

Connect the 8 home appliances as per the circuit diagram.

Please take proper safety precautions while working with high voltage.

Connect 5-volt 5-amp DC supply with the PCB.

Turn ON the Supply

Turn on the 110V/230V supply and 5V DC supply.

Finally!!

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Now you can control your home appliances in a smart way.

I hope you have liked this home automation project. I have shared all the required information for this project. I will really appreciate it if you share your valuable feedback.

Also if you have any query please write in the comment section. Thank you & Happy Learning.

Code

Code of ESP32 Control 8 Relays with IR Receiver and switches (Latched)

 /**********************************************************************************
 *  TITLE: Blynk + IR + Manual (Switch) control 8-Channel Relays using ESP32 with Realtime Feedback & No WiFi control
 *  Click on the following links to learn more. 
 *  YouTube Video: https://youtu.be/2HxWGHXyCt4
 *  Related Blog : https://iotcircuithub.com/esp32-projects/
 *  by Tech StudyCell
 *  Preferences--> Aditional boards Manager URLs : 
 *  https://dl.espressif.com/dl/package_esp32_index.json, http://arduino.esp8266.com/stable/package_esp8266com_index.json
 *  
 *  Download Board ESP32 : https://github.com/espressif/arduino-esp32
 *  
 *  Download the libraries 
 *  Blynk Library: https://github.com/blynkkk/blynk-library/releases/download/v0.6.1/Blynk_Release_v0.6.1.zip
 *  AceButton Library: https://github.com/bxparks/AceButton
 *  IRremote Library: https://github.com/Arduino-IRremote/Arduino-IRremote
 **********************************************************************************/

#include <IRremote.h>
#include <BlynkSimpleEsp32.h>
#include <AceButton.h>
using namespace ace_button;

BlynkTimer timer1;

// define the GPIO connected with Relays and switches
#define RelayPin1 23  //D23
#define RelayPin2 22  //D22
#define RelayPin3 21  //D21
#define RelayPin4 19  //D19
#define RelayPin5 18  //D18
#define RelayPin6 5   //D5
#define RelayPin7 25  //D25
#define RelayPin8 26  //D26

#define SwitchPin1 13  //D13
#define SwitchPin2 12  //D12
#define SwitchPin3 14  //D14
#define SwitchPin4 27  //D27
#define SwitchPin5 33  //D33
#define SwitchPin6 32  //D32
#define SwitchPin7 15  //D15
#define SwitchPin8 4   //D4

#define wifiLed     2   //D2
#define IR_RECV_PIN 35  //D35

#define VPIN_BUTTON_1    V1 
#define VPIN_BUTTON_2    V2
#define VPIN_BUTTON_3    V3 
#define VPIN_BUTTON_4    V4
#define VPIN_BUTTON_5    V5 
#define VPIN_BUTTON_6    V6
#define VPIN_BUTTON_7    V7 
#define VPIN_BUTTON_8    V8
#define VPIN_BUTTON_9    V9

int toggleState_1 = 1; //Define integer to remember the toggle state for relay 1
int toggleState_2 = 1; //Define integer to remember the toggle state for relay 2
int toggleState_3 = 1; //Define integer to remember the toggle state for relay 3
int toggleState_4 = 1; //Define integer to remember the toggle state for relay 4
int toggleState_5 = 1; //Define integer to remember the toggle state for relay 5
int toggleState_6 = 1; //Define integer to remember the toggle state for relay 6
int toggleState_7 = 1; //Define integer to remember the toggle state for relay 7
int toggleState_8 = 1; //Define integer to remember the toggle state for relay 8

int wifiFlag = 0;

IRrecv irrecv(IR_RECV_PIN);
decode_results results;

ButtonConfig config1;
AceButton button1(&config1);
ButtonConfig config2;
AceButton button2(&config2);
ButtonConfig config3;
AceButton button3(&config3);
ButtonConfig config4;
AceButton button4(&config4);
ButtonConfig config5;
AceButton button5(&config5);
ButtonConfig config6;
AceButton button6(&config6);
ButtonConfig config7;
AceButton button7(&config7);
ButtonConfig config8;
AceButton button8(&config8);

void handleEvent1(AceButton*, uint8_t, uint8_t);
void handleEvent2(AceButton*, uint8_t, uint8_t);
void handleEvent3(AceButton*, uint8_t, uint8_t);
void handleEvent4(AceButton*, uint8_t, uint8_t);
void handleEvent5(AceButton*, uint8_t, uint8_t);
void handleEvent6(AceButton*, uint8_t, uint8_t);
void handleEvent7(AceButton*, uint8_t, uint8_t);
void handleEvent8(AceButton*, uint8_t, uint8_t);

#define AUTH "AUTH TOKEN"                 // You should get Auth Token in the Blynk App.  
#define WIFI_SSID "WIFI NAME"             //Enter Wifi Name
#define WIFI_PASS "WIFI PASSWORD"         //Enter wifi Password

void relayOnOff(int relay){

    switch(relay){
      case 1: 
             if(toggleState_1 == 1){
              digitalWrite(RelayPin1, LOW); // turn on relay 1
              toggleState_1 = 0;
              Serial.println("Device1 ON");
              }
             else{
              digitalWrite(RelayPin1, HIGH); // turn off relay 1
              toggleState_1 = 1;
              Serial.println("Device1 OFF");
              }
             delay(100);
      break;
      case 2: 
             if(toggleState_2 == 1){
              digitalWrite(RelayPin2, LOW); // turn on relay 2
              toggleState_2 = 0;
              Serial.println("Device2 ON");
              }
             else{
              digitalWrite(RelayPin2, HIGH); // turn off relay 2
              toggleState_2 = 1;
              Serial.println("Device2 OFF");
              }
             delay(100);
      break;
      case 3: 
             if(toggleState_3 == 1){
              digitalWrite(RelayPin3, LOW); // turn on relay 3
              toggleState_3 = 0;
              Serial.println("Device3 ON");
              }
             else{
              digitalWrite(RelayPin3, HIGH); // turn off relay 3
              toggleState_3 = 1;
              Serial.println("Device3 OFF");
              }
             delay(100);
      break;
      case 4: 
             if(toggleState_4 == 1){
              digitalWrite(RelayPin4, LOW); // turn on relay 4
              toggleState_4 = 0;
              Serial.println("Device4 ON");
              }
             else{
              digitalWrite(RelayPin4, HIGH); // turn off relay 4
              toggleState_4 = 1;
              Serial.println("Device4 OFF");
              }
             delay(100);
      break;
      case 5: 
             if(toggleState_5 == 1){
              digitalWrite(RelayPin5, LOW); // turn on relay 5
              toggleState_5 = 0;
              Serial.println("Device5 ON");
              }
             else{
              digitalWrite(RelayPin5, HIGH); // turn off relay 5
              toggleState_5 = 1;
              Serial.println("Device5 OFF");
              }
             delay(100);
      break;
      case 6: 
             if(toggleState_6 == 1){
              digitalWrite(RelayPin6, LOW); // turn on relay 6
              toggleState_6 = 0;
              Serial.println("Device6 ON");
              }
             else{
              digitalWrite(RelayPin6, HIGH); // turn off relay 6
              toggleState_6 = 1;
              Serial.println("Device6 OFF");
              }
             delay(100);
      break;
      case 7: 
             if(toggleState_7 == 1){
              digitalWrite(RelayPin7, LOW); // turn on relay 7
              toggleState_7 = 0;
              Serial.println("Device7 ON");
              }
             else{
              digitalWrite(RelayPin7, HIGH); // turn off relay 7
              toggleState_7 = 1;
              Serial.println("Device7 OFF");
              }
             delay(100);
      break;
      case 8: 
             if(toggleState_8 == 1){
              digitalWrite(RelayPin8, LOW); // turn on relay 8
              toggleState_8 = 0;
              Serial.println("Device8 ON");
              }
             else{
              digitalWrite(RelayPin8, HIGH); // turn off relay 8
              toggleState_8 = 1;
              Serial.println("Device8 OFF");
              }
             delay(100);
      break;
      default : break;      
      }  
}

void all_SwitchOff(){
  toggleState_1 = 1; digitalWrite(RelayPin1, toggleState_1); Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1); delay(100);
  toggleState_2 = 1; digitalWrite(RelayPin2, toggleState_2); Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2); delay(100);
  toggleState_3 = 1; digitalWrite(RelayPin3, toggleState_3); Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3); delay(100);
  toggleState_4 = 1; digitalWrite(RelayPin4, toggleState_4); Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4); delay(100);
  toggleState_5 = 1; digitalWrite(RelayPin5, toggleState_5); Blynk.virtualWrite(VPIN_BUTTON_5, toggleState_5); delay(100);
  toggleState_6 = 1; digitalWrite(RelayPin6, toggleState_6); Blynk.virtualWrite(VPIN_BUTTON_6, toggleState_6); delay(100);
  toggleState_7 = 1; digitalWrite(RelayPin7, toggleState_7); Blynk.virtualWrite(VPIN_BUTTON_7, toggleState_7); delay(100);
  toggleState_8 = 1; digitalWrite(RelayPin8, toggleState_8); Blynk.virtualWrite(VPIN_BUTTON_8, toggleState_8); delay(100);
}

void ir_remote(){
  if (irrecv.decode(&results)) {
      switch(results.value){
          case 0x80BF49B6:  relayOnOff(1); Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1); break;
          case 0x80BFC936:  relayOnOff(2); Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2); break;
          case 0x80BF33CC:  relayOnOff(3); Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3); break;
          case 0x80BF718E:  relayOnOff(4); Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4); break;
          case 0x80BFF10E:  relayOnOff(5); Blynk.virtualWrite(VPIN_BUTTON_5, toggleState_5); break;
          case 0x80BF13EC:  relayOnOff(6); Blynk.virtualWrite(VPIN_BUTTON_6, toggleState_6); break;
          case 0x80BF51AE:  relayOnOff(7); Blynk.virtualWrite(VPIN_BUTTON_7, toggleState_7); break;
          case 0x80BFD12E:  relayOnOff(8); Blynk.virtualWrite(VPIN_BUTTON_8, toggleState_8); break;
          case 0x80BF3BC4:  all_SwitchOff(); break;
          default : break;         
        }   
        //Serial.println(results.value, HEX);    
        irrecv.resume();   
  } 
}

// When App button is pushed - switch the state
BLYNK_WRITE(VPIN_BUTTON_1) {
  toggleState_1 = param.asInt();
  digitalWrite(RelayPin1, toggleState_1);
}

BLYNK_WRITE(VPIN_BUTTON_2) {
  toggleState_2 = param.asInt();
  digitalWrite(RelayPin2, toggleState_2);
}

BLYNK_WRITE(VPIN_BUTTON_3) {
  toggleState_3 = param.asInt();
  digitalWrite(RelayPin3, toggleState_3);
}

BLYNK_WRITE(VPIN_BUTTON_4) {
  toggleState_4 = param.asInt();
  digitalWrite(RelayPin4, toggleState_4);
}

BLYNK_WRITE(VPIN_BUTTON_5) {
  toggleState_5 = param.asInt();
  digitalWrite(RelayPin5, toggleState_5);
}

BLYNK_WRITE(VPIN_BUTTON_6) {
  toggleState_6 = param.asInt();
  digitalWrite(RelayPin6, toggleState_6);
}

BLYNK_WRITE(VPIN_BUTTON_7) {
  toggleState_7 = param.asInt();
  digitalWrite(RelayPin7, toggleState_7);
}

BLYNK_WRITE(VPIN_BUTTON_8) {
  toggleState_8 = param.asInt();
  digitalWrite(RelayPin8, toggleState_8);
}

BLYNK_WRITE(VPIN_BUTTON_9) {
  all_SwitchOff();
}

BLYNK_CONNECTED() {
  // Request the latest state from the server
  Blynk.syncVirtual(VPIN_BUTTON_1);
  Blynk.syncVirtual(VPIN_BUTTON_2);
  Blynk.syncVirtual(VPIN_BUTTON_3);
  Blynk.syncVirtual(VPIN_BUTTON_4);
  Blynk.syncVirtual(VPIN_BUTTON_5);
  Blynk.syncVirtual(VPIN_BUTTON_6);
  Blynk.syncVirtual(VPIN_BUTTON_7);
  Blynk.syncVirtual(VPIN_BUTTON_8);
}

void checkBlynkStatus() { // called every 3 seconds by SimpleTimer

  bool isconnected = Blynk.connected();
  if (isconnected == false) {
    wifiFlag = 1;
    digitalWrite(wifiLed, LOW); //Turn off WiFi LED
  }
  if (isconnected == true) {
    wifiFlag = 0;    
    digitalWrite(wifiLed, HIGH); //Turn on WiFi LED
  }
}
void setup()
{
  Serial.begin(9600);
  
  irrecv.enableIRIn(); // Start the receiver
  
  pinMode(RelayPin1, OUTPUT);
  pinMode(RelayPin2, OUTPUT);
  pinMode(RelayPin3, OUTPUT);
  pinMode(RelayPin4, OUTPUT);
  pinMode(RelayPin5, OUTPUT);
  pinMode(RelayPin6, OUTPUT);
  pinMode(RelayPin7, OUTPUT);
  pinMode(RelayPin8, OUTPUT);

  pinMode(wifiLed, OUTPUT);

  pinMode(SwitchPin1, INPUT_PULLUP);
  pinMode(SwitchPin2, INPUT_PULLUP);
  pinMode(SwitchPin3, INPUT_PULLUP);
  pinMode(SwitchPin4, INPUT_PULLUP);
  pinMode(SwitchPin5, INPUT_PULLUP);
  pinMode(SwitchPin6, INPUT_PULLUP);
  pinMode(SwitchPin7, INPUT_PULLUP);
  pinMode(SwitchPin8, INPUT_PULLUP);
  
  //During Starting all Relays should TURN OFF
  digitalWrite(RelayPin1, toggleState_1);
  digitalWrite(RelayPin2, toggleState_2);
  digitalWrite(RelayPin3, toggleState_3);
  digitalWrite(RelayPin4, toggleState_4);
  digitalWrite(RelayPin5, toggleState_5);
  digitalWrite(RelayPin6, toggleState_6);
  digitalWrite(RelayPin7, toggleState_7);
  digitalWrite(RelayPin8, toggleState_8);

  config1.setEventHandler(button1Handler);
  config2.setEventHandler(button2Handler);
  config3.setEventHandler(button3Handler);
  config4.setEventHandler(button4Handler);
  config5.setEventHandler(button5Handler);
  config6.setEventHandler(button6Handler);
  config7.setEventHandler(button7Handler);
  config8.setEventHandler(button8Handler);
  
  button1.init(SwitchPin1);
  button2.init(SwitchPin2);
  button3.init(SwitchPin3);
  button4.init(SwitchPin4);
  button5.init(SwitchPin5);
  button6.init(SwitchPin6);
  button7.init(SwitchPin7);
  button8.init(SwitchPin8);


  WiFi.begin(WIFI_SSID, WIFI_PASS);
  timer1.setInterval(2000L, checkBlynkStatus); // check if Blynk server is connected every 3 seconds
  Blynk.config(AUTH);
  delay(1000);

  Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);
  Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
  Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
  Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
  Blynk.virtualWrite(VPIN_BUTTON_5, toggleState_5);
  Blynk.virtualWrite(VPIN_BUTTON_6, toggleState_6);
  Blynk.virtualWrite(VPIN_BUTTON_7, toggleState_7);
  Blynk.virtualWrite(VPIN_BUTTON_8, toggleState_8);
}

void loop()
{      
  ir_remote();
  
  button1.check();
  button2.check();
  button3.check();
  button4.check();
  button5.check();
  button6.check();
  button7.check();
  button8.check();

  if (WiFi.status() == WL_CONNECTED)
  {
    Blynk.run();
  }
  
  timer1.run(); // Initiates SimpleTimer
}

void button1Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT1");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_1 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);   // Update Button Widget
      digitalWrite(RelayPin1, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_1 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);   // Update Button Widget
      digitalWrite(RelayPin1, HIGH);
      break;
  }
}

void button2Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT2");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_2 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
      digitalWrite(RelayPin2, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_2 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
      digitalWrite(RelayPin2, HIGH);
      break;
  }
}

void button3Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT3");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_3 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
      digitalWrite(RelayPin3, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_3 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
      digitalWrite(RelayPin3, HIGH);
      break;
  }
}

void button4Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT4");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_4 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
      digitalWrite(RelayPin4, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_4 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
      digitalWrite(RelayPin4, HIGH);
      break;
  }
}

void button5Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT5");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_5 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_5, toggleState_5);
      digitalWrite(RelayPin5, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_5 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_5, toggleState_5);
      digitalWrite(RelayPin5, HIGH);
      break;
  }
}

void button6Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT6");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_6 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_6, toggleState_6);
      digitalWrite(RelayPin6, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_6 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_6, toggleState_6);
      digitalWrite(RelayPin6, HIGH);
      break;
  }
}

void button7Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT7");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_7 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_7, toggleState_7);
      digitalWrite(RelayPin7, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_7 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_7, toggleState_7);
      digitalWrite(RelayPin7, HIGH);
      break;
  }
}

void button8Handler(AceButton* button, uint8_t eventType, uint8_t buttonState) {
  Serial.println("EVENT8");
  switch (eventType) {
    case AceButton::kEventPressed:
      Serial.println("kEventPressed");
      toggleState_8 = 0;
      Blynk.virtualWrite(VPIN_BUTTON_8, toggleState_8);
      digitalWrite(RelayPin8, LOW);
      break;
    case AceButton::kEventReleased:
      Serial.println("kEventReleased");
      toggleState_8 = 1;
      Blynk.virtualWrite(VPIN_BUTTON_8, toggleState_8);
      digitalWrite(RelayPin8, HIGH);
      break;
  }
}

Credits

Subhajit

47 projects • 126 followers

I have studied Electrical Engineering. I do love to make different DIY electronics projects & share it on my YouTube channel Tech StudyCell.

Home Automation using Blynk IR Remote & ESP32 - IoT Projects

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Tutorial Video on Blynk ESP32 Smart Home System

Circuit Diagram of the ESP32 Projects

Required Components:

Required Components for the PCB

Required Software:

Control Relays With Internet Using Blynk

ESP32 Control Relay With IR Remote

Control Relays Using Switches or Push-buttons

Configure the Blynk App for the ESP32

Add the Button Widgets in Blynk App

Get the IR Codes (HEX Code) From Remote

Codes for the Blynk ESP32 Home Automation

Program the ESP32 With Arduino IDE

Designing the PCB for ESP32 Projects

Order the PCB

Uploading the Gerber File and Set the Parameters

Select Shipping Address and Payment Mode

Solder All the Components on PCB

Connect the Home Appliances

Turn ON the Supply

Finally!!

Schematics

Circuit of ESP32 Control Relay with IR Receiver and switches

Code

Code of ESP32 Control 8 Relays with IR Receiver and switches (Latched)

Credits

Subhajit

Comments

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Home Automation using Blynk IR Remote & ESP32 - IoT Projects

Home Automation using Blynk IR Remote & ESP32 - IoT Projects

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Tutorial Video on Blynk ESP32 Smart Home System

Circuit Diagram of the ESP32 Projects

Required Components:

Required Components for the PCB

Required Software:

Control Relays With Internet Using Blynk

ESP32 Control Relay With IR Remote

Control Relays Using Switches or Push-buttons

Configure the Blynk App for the ESP32

Add the Button Widgets in Blynk App

Get the IR Codes (HEX Code) From Remote

Codes for the Blynk ESP32 Home Automation

Program the ESP32 With Arduino IDE

Designing the PCB for ESP32 Projects

Order the PCB

Uploading the Gerber File and Set the Parameters

Select Shipping Address and Payment Mode

Solder All the Components on PCB

Connect the Home Appliances

Turn ON the Supply

Finally!!

Schematics

Circuit of ESP32 Control Relay with IR Receiver and switches

Code

Code of ESP32 Control 8 Relays with IR Receiver and switches (Latched)

Credits

Subhajit

Comments

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