Published May 11, 2025 © GPL3+

Infrared control system

An Arduino-based IR remote control system that receives IR signals and sends commands to a Windows Forms app via serial communication

BeginnerFull instructions provided2 hours53

Things used in this project

Hardware components

Arduino Nano R3

Software apps and online services

Arduino IDE

Microsoft Visual Studio 2015

Story

The user presses a button on the IR remote control.
The IR receiver module captures the infrared signal and sends the corresponding code to the Arduino.
The Arduino processes the received code and performs the specific action assigned to that button.
Depending on the command, the system may turn LEDs on or off, display information on the 7-segment display, or activate other components such as motors.
The KY-033 IR obstacle sensor continuously checks for obstacles in front of the robot. If an obstacle is detected, the Arduino stops the movement or triggers a warning to avoid collision.
The current system status (e.g., pressed key code or obstacle detection) is shown on the TM1637 7-segment display for feedback.

Infrared control system

#include <IRremote.hpp>
#include <TM1637Display.h>


#define IR_PIN 3
#define LED1 4
#define LED2 5
#define CLK 7
#define DIO 6

TM1637Display display(CLK, DIO);

void setup() {
  Serial.begin(9600);


  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);


  IrReceiver.begin(IR_PIN, ENABLE_LED_FEEDBACK); 
  display.setBrightness(0x0f);
  display.clear();
}

void loop() {
  if (IrReceiver.decode()) {
    unsigned long command = IrReceiver.decodedIRData.command;
    Serial.print("Code: ");
    Serial.println(command, HEX);

    if (command ==0xA1) { 
      digitalWrite(LED1, HIGH);
      digitalWrite(LED2, LOW);
      display.showNumberDec(1);
    }
    else if (command == 0xA2) { 
      digitalWrite(LED1, LOW);
      digitalWrite(LED2, HIGH);
      display.showNumberDec(2);
    }
    else if (command == 0xA3){ 
      digitalWrite(LED1, LOW);
      digitalWrite(LED2, LOW);
      display.showNumberDec(0);
    }

    IrReceiver.resume(); 
  }
}