IR Remote Recognizing Button Held

Development Boards Arduino
1

I’m trying to give different functions to each IR remote button with single press and held down.

I understand that there’s a repeat signal sent when a button is held but I’m not quite sure how to handle these signals. Any help would be appreciated.

I am using these 2 products:

https://www.sparkfun.com/products/11759

https://www.sparkfun.com/products/8554

Based on the example here:

http://dlnmh9ip6v2uc.cloudfront.net/dat … xample.ino

2

I’m not sure what your question is. Does the existing code work in identifying the buttons pressed or not ?

3

At first thought, I think you could simply set a coded threshold so say a value = up so many times in a row, do something. You can then figure out how many times a command it repeated if you press the button for so long. Make that your threshold, and have your code operate a different function based off that new button function.

A good code to sample for the structure and coding of this I would look over

http://arduino.cc/en/Tutorial/ButtonStateChange

I hope this helps.

4

Most remotes send a burst of 3-4 copies of the keycode on first press, then if you hold

the button it transmits a repeat code of all 1’s like 0xFFFFFFFF until release.

The standard IRemote library will give you result.value = 0xFFFFFFFF in most cases,

regardless of the bit length used by the protocol - at least that has been my experience.

The IRecvDemo example will show you the stream of codes it receives so you can

observe what a single press vs. press/hold looks like.

Your sketch needs to remember what was the most recently received non-repeat value,

then when you do see a repeat you can know what button is being held down.

You should also use a small timeout to handle the case when the initial code is

missed and you start to pick up a repeat that is not associated with the most

recent successfully decoded value - also to reject noise which can come in as

all 1’s.

5

OK if you’re trying to distinguish btw the “normal” codes and the one for repeat and then make something different happen when A is pressed vs when A is held pressed and thus ‘repeated’ …

I would add a new variable, let’s call it prevResults, and set prevResults = results.value whenever results.value is a recognized value (and not = the repeat code). Then when the repeat code is recognized, that plus the knowledge of the code pressed prior to the repeat (whatever prevResults is), could be coded to send a new msg … like “A repeated” or whatever else you desire.

Add the repeat code (found in the comments section of the IR remote) to the list of defines …

#define POWER 0x10EFD827 
#define A 0x10EFF807 
#define B 0x10EF7887
#define C 0x10EF58A7
#define UP 0x10EFA05F
#define DOWN 0x10EF00FF
#define LEFT 0x10EF10EF
#define RIGHT 0x10EF807F
#define SELECT 0x10EF20DF
#define REPEAT 0x????????

then set prevResults wherever another cmd is recognized (examples shown below)

void loop() 
{
  if (irrecv.decode(&results)) 
  {
    if (results.value == POWER) 
    {
      Serial.println("POWER");
      prevResults = 0x10EFD827;
    }
     if (results.value == A)
    {
       Serial.println("A"); 
       prevResults = 0x10EFF807;
    }
...

and then add new code to do what you want given the REPEAT code and prevResults …

    if (results.value == SELECT) 
    {
      Serial.println("SELECT");  
      prevResults = 0x10EF20DF;
    }
    if (results.value == REPEAT) 
    {
      Serial.println("REPEAT");  
      new code goes here;
    }
    irrecv.resume();
  }
}