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Read an IR Remote (Arduino)

Decode button presses from any infrared remote and print their codes. The first step to remote-controlling anything.

Beginner20 min

What you need

Wiring

Arduino Uno
IR receiver

Hover a pin or a wire to trace the connection.

Code

ir_remote.ino
// Print the code of each IR remote button.
// Install "IRremote" by shirriff/Armin Joachimsmeyer (v3+).
#include <IRremote.h>

const int recvPin = 2;

void setup() {
  Serial.begin(9600);
  IrReceiver.begin(recvPin);
}

void loop() {
  if (IrReceiver.decode()) {
    Serial.print("Button code: 0x");
    Serial.println(IrReceiver.decodedIRData.command, HEX);
    IrReceiver.resume(); // ready for the next press
  }
}

Steps

  1. Check your module's pin order on the silkscreen, then wire OUT to D2, VCC to 5V, GND to GND.
  2. Install the "IRremote" library (v3+).
  3. Upload, open the Serial Monitor, and press remote buttons to see each code.
  4. Use those codes in if-statements to trigger your own actions.