1

Sending IR strings longer than 255 characters.

Jeremy Aston

October 04, 2011 10:08

None

Follow

Hi,

I am trying to send IR out via the Crestron module but have a problem where the IR string learnt is more than 255 characters in length.  This breaks the Crestron limit of 255 characters on a STRING_OUTPUT.

How can I send this?  Is it possible to break the string up into chunks <256 characters in length?  If so then I can't see a way of sending this to the Crestron module as it is expecting the IR in one chunk.  I guess the only way would be to change the module to do a GATHER until it sees a "\x0d" and add this to the final chunk?

Alternately, is there a way of reducing the IR string length?

It also has to take into account the sendir front bit....

Cheers

Jez

• Facebook
• Twitter
• LinkedIn

13 comments

• 0
  
  Jeremy Aston October 04, 2011 10:46

  I have done a mod to the module that allows for the definition and triggering of
  IR strings directly in the GC100 module thus getting around the issue of sending
  a truncated serial signal to the GC100 module.
  
  It's a bit ugly as the module has to have each string defined directly in it but
  it does work as the module handles chunking the output IR string into chunks <
  256 characters.
  
  A string_output of > 255 chars on series 2 would be better though ;-)
  
  jez

• 0
  
  Antonis Papantonakis October 04, 2011 11:56

  Can you post the actual IR string so that we can see if it can be trimmed?

• 0
  
  Jeremy Aston October 04, 2011 13:37

  There are several codes but here is an example....

   

  40000,1,1,342,170,22,63,22,63,21,20,21,20,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,21,20,21,20,22,63,21,20,22,63,22,63,21,20,21,20,22,63,22,63,21,20,22,1017,342,170,22,63,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,21,20,21,20,22,63,21,20,22,63,21,20,22,63,22,63,22,63,22,63,21,20,22,63,22,63,22,63,21,20,21,20,21,20,21,20,22,63,21,20,21,20,21,20,22,800

   

  Rgds

   

  Jeremy

• 0
  
  Josh Sherman October 04, 2011 16:47

  Sadly, it looks as though you do need the entirety of the command data, as the command does not repeat itself internally. If you are using an iTach unit, you can use the compressed format rather than the normal format, but you won't be able to use that method if you are using a GC-100. If someone could post the altered module here with the support for longer command data, it would be greatly appreciated.

• 0
  
  Antonis Papantonakis October 04, 2011 19:39

  I think there are actually two distinct IR commands in the string that you have provided.

  Your whole string:

  40000,1,1,342,170,22,63,22,63,21,20,21,20,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,21,20,21,20,22,63,21,20,22,63,22,63,21,20,21,20,22,63,22,63,21,20,22,1017,342,170,22,63,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,21,20,21,20,22,63,21,20,22,63,21,20,22,63,22,63,22,63,22,63,21,20,22,63,22,63,22,63,21,20,21,20,21,20,21,20,22,63,21,20,21,20,21,20,22,800

   

  First one (cut at character number 218)  is the following:

  342,170,22,63,22,63,21,20,21,20,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,22,63,22,63,21,20,21,20,22,63,21,20,22,63,22,63,21,20,21,20,22,63,22,63,21,20,22,1017

  (leaving out the 40000,1,1 part)

  And 2nd part is from character 209 and after:

  342,170,22,63,22,63,22,63,22,63,21,20,22,63,21,20,22,63,21,20,21,20,21,20,21,20,22,63,21,20,22,63,21,20,22,63,22,63,22,63,22,63,21,20,22,63,22,63,22,63,21,20,21,20,21,20,21,20,22,63,21,20,21,20,21,20,22,800

  The 1017 and 800 at the end of each part signify the "silence" at the end of each command.

  Both parts are less than 255 chars so you should be ok sending your original command as two, separated as shown (each starting with the 40000,1,1 part)

  Regards,

  Antonis

  https://sites.google.com/site/remotex4/

• 0
  
  Hilko Lantinga January 27, 2012 15:19

  As for as I've read the GC100 does support compressed, but only with 4 letters (ABCD) so you could trim it down even further, the second command compressed would be:

  sendir,1:1,1,40000,1,1,342,170,22,63B,20,20CCBCBCCBBBCBCBCCBBCCBCBBCCBBC,22,800

• 0
  
  Hilko Lantinga January 27, 2012 15:27

  Ehrm that should be the first one, the second one would be:

  sendir,1:1,1,40000,1,1,342,170,22,63BBB,20,20BCBCCCCBCBCBBBBCBBBCCCCBCCC,22,800

• 0
  
  Hilko Lantinga January 27, 2012 19:22

  And I was wrong, the GC does not support compressed ir.

   It was this line in the change log of the mac version of iLearn that got me on the wrong foot:

  The following changes have been made:

  • Compressed IR format of the iTach can have more letters than the GC100. This was not taken into account and is corrected.
• 0
  
  Björn Johansson December 15, 2012 18:15

  Hi!

   

  A little bit of topic but i hope you can help me. I got an Crestron QM-RMCRX-BA Controll Processor and i want to control my Itach's from it.

  As i can see in the GC-100 demo program it wouldn't be so hard but i can't connect.!!

  I've tried to connect via the TCP/IP Client in Crestron simpl on port 4998 but it wont work?

  When i try from a standard TCP/IP Client program from my computer it works, when i try with the exact same parameters to my computers ip-adress from crestron it works.

  So what am i doing wrong?

   

  Best Regards Björn

• 0
  
  Josh Sherman December 17, 2012 18:59

  The best thing to do in these cases is use Wireshark to watch the packet transaction to see what is happening at the TCP level. This will help you see the difference between the connection that works and the one that does not and hopefully point you toward your solution.
  www.wireshark.org

• 0
  
  Brad Cleal September 28, 2013 04:37

  Hi, I just wrote a module that reads and converts Crestron.ir files, it also connects and sends GC ir when a button is pressed. Just drop them in the user folder on the Crestron processor.

  This also gets you around the 255 char limit, I tested a 1319 chars long CCF code for Fujitsu Air Conditioner just now without any problem.

  http://www.solutionav.com.au/store.html

  There is a one time download fee, but its unlocked and unlimited once you have it.

   

  Kind regards

  Brad Cleal

  SolutionAV

• 0
  
  Matthew Hood August 04, 2014 23:06

  So I just ran across this and am trying to automate my house that has Mitsubishi ductless units.  I planned to use the Wifi Flex units on 3 different units and found the codes i needed here: http://www.remotecentral.com/cgi-bin/codes/mitsubishi/air_conditioning/

  This code is to long to be put in Hex Format so I converted teh first code to GC and got this:

  sendir,<mod-addr>:<conn-addr>,1,38000,<repeatcount>,1,0,76,0,28,0,28,0,28,0,28,0,75,0,28,0,28,0,75,0,75,0,75,0,28,0,28,0,28,0,28,0,28,0,75,0,28,0,28,0,28,0,75,0,75,0,28,0,28,0,75,0,75,0,75,0,75,0,75,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,361,0,76,0,28,0,28,0,28,0,28,0,75,0,28,0,28,0,75,0,75,0,75,0,28,0,28,0,28,0,28,0,28,0,75,0,28,0,28,0,28,0,75,0,75,0,28,0,28,0,75,0,75,0,75,0,75,0,75,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,28,0,402

  A Few Questions:  It looks like it repeats but there are differennt ending codes and i'm not sure what the mean.  Do i just need the first half?  Do I need it all?  

  Will the Itach Flex recognize this?  Do I need to put it in to something called compressed GC and what are the advantages to doing this.  

  I was going to impliment this into vera and irule.

  Thank you for any help!

   

• 0
  
  Garrett Gustafson October 02, 2014 22:25

  Hi Matthew,

  Unfortunately I don't think you received good IR data from the remotecentral forum.  A normal code will not have any 0 pulse values.  The flex has a built in IR learner that you can use to learn IR codes with.  If you cannot find the codes you need on our database (irdb.globalcache.com), I would suggest learning the codeset using iLearn (www.globalcache.com/downloads/).

  If you need any additional help with iLearn please send a message to our support portal (support@globalcache.com) and we would be happy to send you more information.