Arduino IR Remote Reader (VS1838B example)

A simple and clear example of using Arduino + VS1838B to read infrared remote control signals using the IRremote library.

This project is intended for beginners and for anyone who wants to quickly test an IR receiver and view remote control codes in the Serial Monitor.

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🎥 Demo Video

🔧 Hardware Used

• Arduino (Uno / Nano / Mega, etc.)
• VS1838B IR receiver (38 kHz)
• Breadboard and jumper wires
• Any IR remote (TV, set-top box, air conditioner, etc.)

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🔌 VS1838B Wiring

When holding the VS1838B with the IR window facing you, pins from left to right:

VS1838B Pin	Function	Arduino
1	OUT (Signal)	D2
2	GND	GND
3	VCC	5V

VS1838B Arduino

OUT ────▶ D2

GND ────▶ GND

VCC ────▶ 5V

⚠️ Important: Do not swap GND and VCC — the receiver may be permanently damaged.

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📚 Dependencies

This project uses the following library:

• IRremote (Arduino-IRremote)

Installation:

Arduino IDE → Library Manager → IRremote

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🧠 What This Example Does

• Initializes the IR receiver
• Reads signals from an IR remote
• Prints the received code to the Serial Monitor

⚠️ For some remotes (e.g. TCL TVs or air conditioners), decodedRawData may always be 0x0.
In such cases, RAW decoding mode is required (see notes below).

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🧪 Example Code

#include <IRremote.hpp>

#define IR_PIN 2

void setup() {
  Serial.begin(9600);
  IrReceiver.begin(IR_PIN, ENABLE_LED_FEEDBACK);

  Serial.println("Hello from udfsoft.com !");
}

void loop() {
  if (IrReceiver.decode()) {
    Serial.print("Code 0x");
    Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
    IrReceiver.resume();
  }
}

🖥️ Serial Monitor

Baud rate: 9600

Line ending: any

Example output:

Hello from udfsoft.com !
Code 0x20DF10EF
Code 0x20DF40BF

⚠️ Important Notes

Samsung, LG remotes usually work immediately

TCL, air conditioners, and Smart TV remotes often use non-standard protocols

In such cases, it is recommended to use:

IrReceiver.printIRResultRawFormatted(&Serial, true);

🚀 Possible Improvements

• Add RAW decoding support
• Implement IR transmission (IR LED + transistor)
• Build a universal IR remote
• Port the project to ESP32 / Wi-Fi / MQTT

📷 Photo

📜 License

Apache License 2.0

More details: https://www.apache.org/licenses/LICENSE-2.0

👤 Author

UDFOwner https://udfsoft.com/

Pull requests and improvements are welcome 🙂