IR-library, cant extract code from string

Projects Programming
1

By 'mistake' I bought a couple of "Nibobee" robots. (got totally NOT what I expected)
Thet are based om ATmega16, so I flashed a bootloader .. all good so far.
I found this library for receiving IR codes:

The example (below) shows me the correct result on the serial monitor.. I dont need this, but rather the last two chars from the IR-code itself. I've searched the documentation I can find, but have not found the solution yet.
Help is appreciated..

/*  https://github.com/z3t0/Arduino-IRremote. */
#include <IRremote.h>
#define IR_RECEIVE_PIN  25  // ATMEGA16
IRrecv IrReceiver(IR_RECEIVE_PIN);

byte code ;
void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
  IrReceiver.enableIRIn();  // Start the receiver
}
void loop()
{
  if (IrReceiver.decode())  
  {
    IrReceiver.printResultShort(&Serial);
    IrReceiver.resume(); // Enable receiving of the next value
// ********** I need the last two chars from the IR code *** like:
   byte my_code= ??? ; // cannot fins a way to extrackt what I need
// ********************************
  }
}
2

Is the IR code always the same length ?
What data type is it ?

Please post a complete sketch that illustrates what you want to do and an example of the received IR code and explain what data type you want the extracted data to be in

3

When I comment out thle line I really want finishes: ( byte my_code= ??? )
I get this printout: (one line for each button om my remote)

Protocol=NEC Address=0x0 Command=0x0 Raw-Data=0x10C8C13E (32 bits)
Protocol=NEC Address=0x0 Command=0x0 Raw-Data=0x10C8817E (32 bits)
Protocol=NEC Address=0x0 Command=0x0 Raw-Data=0x10C841BE (32 bits)
Protocol=NEC Address=0x0 Command=0x0 Raw-Data=0x10C8A15E (32 bits)

I cannot fint enough in the docs on github to complete. I'd really like to get those last two chars stored in a byte.
In the code, theres this link to the github lib.

4

I looked up the examples of the library you linked to and found something interesting for you inside of this example
https://github.com/Arduino-IRremote/Arduino-IRremote/blob/master/examples/IR2Keyboard/IR2Keyboard.ino

best regards Stefan

5

SOLVED. (finally found some 'missing info' )
Working code: (not perfect yest)

/*  https://github.com/z3t0/Arduino-IRremote. */

#include <IRremote.h>
#define IR_RECEIVE_PIN  25  // ATMEGA16
IRrecv IrReceiver(IR_RECEIVE_PIN);
decode_results results;  // added

void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
  IrReceiver.enableIRIn();  // Start the receiver
}
void loop()
{
  if (IrReceiver.decode(&results))
  {
    byte code = results.value & 0xFF ;
    Serial.println(code, HEX);
    IrReceiver.resume(); // Enable receiving of the next value
  }
}
6

Thank for hints, I'm started.

7

Be aware that results is deprecated in that library. There is a read() method that returns a pointer to an IRData struct which contains the data that you're looking for.

Below the method

/**
 *@return decoded IRData,
 */
IRData* IRrecv::read() {
    if (irparams.rcvstate != IR_REC_STATE_STOP) {
        return NULL;
    }
    if (decode()) {
        return &decodedIRData;
    } else {
        return NULL;
    }
}

Make sure that you check for NULL before using the IRData.

The struct:

struct IRData {
    decode_type_t protocol;     ///< UNKNOWN, NEC, SONY, RC5, ...
    uint16_t address;           ///< Decoded address
    uint16_t command;           ///< Decoded command
#if defined(ENABLE_EXTRA_INFO)
    uint16_t extra;             ///< Used by MagiQuest and for Kaseikyo unknown vendor ID
#endif
    uint8_t numberOfBits;    ///< Number of bits received for data (address + command + parity + etc.) to determine protocol length.
    uint8_t flags;              ///< See definitions above
    uint32_t decodedRawData;    ///< up to 32 bit decoded raw data, formerly used for send functions.
    irparams_struct *rawDataPtr; /// pointer of the raw timing data to be decoded
};
8

Thanks again. code updated.

9

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