Controlling the relay via remote control and ESP32

 This video demonstrates how to control a 8-channel relay via remote control using an ESP32 board. The presenter explains the pin configuration of the ESP32 and the relay, and then walks through the process of connecting the components and writing a simple code to control the relay. The video is a good introduction for beginners who want to learn how to use relays with ESP32 boards.

Code :

esp32_IrRec

#include <Arduino.h>
#undef LED_BUILTIN
#define LED_BUILTIN         2
#define IR_RECEIVE_PIN      13
#define DECODE_NEC
#include <IRremote.hpp> // Arduino-IRremote: https://github.com/Arduino-IRremote/Arduino-IRremote.

void setup() {
  Serial.begin(115200);
  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK); // data pin 13
}
void loop() {
  irReceive();
  delay(5);
}
void irReceive() {
  if (IrReceiver.decode()) {
    uint16_t received = IrReceiver.decodedIRData.command;
    if (received) {
      Serial.print("Command: 0x");
      Serial.println(received, HEX);
    }
    delay(250);
  }
  IrReceiver.resume();
}

esp32_IrRelay

#include <Arduino.h>
#undef LED_BUILTIN
#define LED_BUILTIN         2
#define IR_RECEIVE_PIN      13
#define DECODE_NEC
#include <IRremote.hpp> // Arduino-IRremote: https://github.com/Arduino-IRremote/Arduino-IRremote.

#define relay_1 0x54
#define relay_2 0x16
#define relay_3 0x15
#define relay_4 0x50
#define relay_5 0x12
#define relay_6 0x11
#define relay_7 0x4C
#define relay_8 0xE
int relay_pin[8] = {23, 22, 21, 19, 25, 26, 27, 14};
bool relay_state[8];
void SetCommand(uint8_t Comd) {
  switch(Comd) {
    case relay_1:
      relay_state[0] = !relay_state[0];
      digitalWrite(relay_pin[0], relay_state[0]);
      break;
    case relay_2:
      relay_state[1] = !relay_state[1];
      digitalWrite(relay_pin[1], relay_state[1]);
      break;
    case relay_3:
      relay_state[2] = !relay_state[2];
      digitalWrite(relay_pin[2], relay_state[2]);
      break;
    case relay_4:
      relay_state[3] = !relay_state[3];
      digitalWrite(relay_pin[3], relay_state[3]);
      break;
    case relay_5:
      relay_state[4] = !relay_state[4];
      digitalWrite(relay_pin[4], relay_state[4]);
      break;
    case relay_6:
      relay_state[5] = !relay_state[5];
      digitalWrite(relay_pin[5], relay_state[5]);
      break;
    case relay_7:
      relay_state[6] = !relay_state[6];
      digitalWrite(relay_pin[6], relay_state[6]);
      break;
    case relay_8:
      relay_state[7] = !relay_state[7];
      digitalWrite(relay_pin[7], relay_state[7]);
      break;
  }
}
void irReceive() {
  if (IrReceiver.decode()) {
    uint16_t received = IrReceiver.decodedIRData.command;
    if (received) {
      Serial.print("Command: 0x");
      Serial.println(received, HEX);
      SetCommand(received);
    }
    delay(250);
  }
  IrReceiver.resume();
}
void setup() {
  Serial.begin(115200);
  delay(2500);
  for ( int j=0; j<8;j++) {
    pinMode(relay_pin[j], OUTPUT);
    relay_state[j] = true;
    digitalWrite(relay_pin[j], HIGH);
  }
  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK); // data pin 13
}
void loop() {
  irReceive();
  delay(5);
}

 

Code & EQUIRES the following Arduino libraries:
    * https://github.com/3tawi/esp32-relay

       * https://github.com/Arduino-IRremote/Arduino-IRremote