How To Find Decoded Code or Decoded Value OF The Unique IR Signal For A Specific Button On Your Remote

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To find the Decoded Value (the unique IR signal for a specific button on your remote), you can use the Serial Monitor in the Arduino IDE to print the code that the IR receiver detects when you press a button.

Here’s how you can do that:

1. Wiring the IR Receiver to Arduino

  • IR Receiver Module Pins:
    • VCC → Connect to 5V on the Arduino.
    • GND → Connect to GND on the Arduino.
    • OUT → Connect to Pin 2 on the Arduino (this is where the Arduino will receive the decoded IR signal).

2. Upload Arduino Code:

#include <IRremote.h>  // Include IRremote library
#define DECODE_NEC  // Define the protocol (NEC)
const byte IR_RECEIVE_PIN = 2;  // IR receiver pin
void setup()  
{
  Serial.begin(9600);  // Start serial communication

  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK, USE_DEFAULT_FEEDBACK_LED_PIN);  // Initialize IR receiver
}

void loop()  
{
  if (IrReceiver.decode())  // Check if IR signal received
  {
    IrReceiver.resume();  // Prepare for next signal
  }

  if (IrReceiver.decodedIRData.command != 0)  // If valid IR command received
  {
    checkIRcode();  // Process and print IR code
  }
}

void checkIRcode()  
{
  Serial.print("Raw = ");  
  Serial.print(IrReceiver.decodedIRData.decodedRawData, HEX);  // Print raw data in HEX
  Serial.print("   Command = ");  
  Serial.println(IrReceiver.decodedIRData.command);  // Print decoded command
  IrReceiver.decodedIRData.command = 0;  // Reset command after processing
}

3. Open the Serial Monitor:

  • After uploading the sketch, open the Serial Monitor in the Arduino IDE (you can open it by going to Tools > Serial Monitor or by pressing Ctrl+Shift+M).
  • Set the baud rate to 9600 to match the setting in the Serial.begin(9600);.

4. Press Buttons on the IR Remote:

  • While the Serial Monitor is open and running, start pressing buttons on your IR remote.
  • For example, when you press button 1, the Serial Monitor may show something like this:
BA45FF00

Tips:

  • Different remotes: Keep in mind that different remotes might use different encoding protocols, so the code may appear differently, but the process remains the same.
  • Multiple buttons: If your remote has multiple buttons, each will print a different unique code in the Serial Monitor, which you can then use to identify which button corresponds to which function.

Summary:

  • Upload a simple code to print the IR codes.
  • Open the Serial Monitor and press buttons on the remote.
  • Note down the Decoded Value for each button.
  • Use the codes in your main project code you are working on.