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Question about a Code found here.
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Post 1 made on Friday November 1, 2013 at 12:34
bWare
Lurking Member
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I have a question about this code:
[Link: remotecentral.com]
the 'Power' code is this:


0000 0071 0000 0002 0000 00AA 0000 0040 0000 0040 0000 0015 0000 0015 0000 0015 0000 0015 0000 0015 0000 0040 0000 0040 0000 0015 0000 0040 0000 0015 0000 0040 0000 0015 0000 0040 0000 0015 0000 0015 0000 0015 0000 0015 0000 0015 0000 0040 0000 0015 0000 0015 0000 003F 0000 0040 0000 0040 0000 003F 0000 0040 0000 0015 0000 0040 0000 0040 0000 0015 0000 0611 0000 0055 0000 0E40

I've tried to break it down they way I see others on this site have done.

0000 - Learned Code
0071 - Frequency is at 36.6 - 40 Khz (we'll use 37,000)
0000 - No Burst Pair 1
0002 - 2 Burst Pairs sequence 2 (since burst pair 1 is empty, we start at word 5)
0000 00AA = 0 170 - Lead In --
0000 0040 = 0 64
0000 0040 = 0 64
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0040 = 0 64
0000 0040 = 0 64
0000 0015 = 0 21
0000 0040 = 0 64
0000 0015 = 0 21
0000 0040 = 0 64
0000 0015 = 0 21
0000 0040 = 0 64
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0015 = 0 21
0000 0040 = 0 64
0000 0015 = 0 21
0000 0015 = 0 21
0000 003F = 0 63
0000 0040 = 0 64
0000 0040 = 0 64
0000 003F = 0 63
0000 0040 = 0 64
0000 0015 = 0 21
0000 0040 = 0 64
0000 0040 = 0 64
0000 0015 = 0 21
0000 0611 = 0 1553
0000 0055 = 0 85
0000 0E40 = 0 3648

Am I missing something? or are the IR 'ON' times all zero?
Is this code valid?
Thanks.
--bWare
Post 2 made on Friday November 1, 2013 at 13:12
Lyndel McGee
RC Moderator
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Posts:
August 2001
12,645
That code data is invalid.

I believe the preamble should have been

0000 0071 0022 0002

Giving you 34 one-shot pairs (0x0022) and 2 (0x0002) repeating pairs.
Lyndel McGee
Philips Pronto Addict/Beta Tester
OP | Post 3 made on Friday November 1, 2013 at 17:51
bWare
Lurking Member
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Posts:
November 2013
5
Thank you for the reply.
I'm actually trying to break this down to the signal timing, the lead in signal, device address, command , and lead out, using time in mS of on and off.

So I've used the pronto IR tool, and the IR Code Doctor to check the code with your suggestion (replacing set 3 with 0022) and it definitely works.

I'm using the information here:
[Link: hifi-remote.com]
to try and determine the timing, and they mention that:
"Doing the arithmetic we see that this code uses a base time of 550 microseconds"
Do you know how I determine this for this code? So I can come up with the mS values?
Thanks,

PS. Thanks, I think I got it. 1 / (the carrier freq) / 22. I think. I'll give this a try.
Post 4 made on Friday November 1, 2013 at 22:09
Lyndel McGee
RC Moderator
Joined:
Posts:
August 2001
12,645
I don't recall the exact formula but Barry Gordon discussed this in his writeup of the Pronto Hex IR format document available in Classic Pronto Files Section under user documentation.

Lyndel
Lyndel McGee
Philips Pronto Addict/Beta Tester
Post 5 made on Saturday November 2, 2013 at 00:19
3FG
Select Member
Joined:
Posts:
August 2009
1,861
No, this is not valid Pronto Hex.  As you've suggested it describes a signal that has no on durations.  I don't know why, but this site has a number of instances of these invalid codes in which every second group of 4 digits is set to zero.

I recognize the intended IR signal; it is NEC1, device 131.85 function 144.  Many Epson projectors use NEC2 131.85, and function 144 is Power On.  NEC1 and NEC2 are different only in the way they repeat-- NEC1 uses a ditto, while NEC2 simply re-sends the entire signal to generate a repeat, so NEC1 will typically work even with a device that expects a NEC2 signal.  Here's the NEC1 signal with the frequency set to the standard set by NEC  (455KHz/12) and the correct 564 uSec basic time.
0000 006C 0022 0002 015B 00AD 0016 0041 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0622 015B 0057 0016 0E6C

Here's the NEC2 signal that the Epson projector is designed to use:
0000 006C 0000 0022 015B 00AD 0016 0041 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0622
I used IrMaster to generate the signals.  Epson codes are available at e.g. [Link: hifi-remote.com].  Read these JP1 files using RemoteMaster.
OP | Post 6 made on Saturday November 2, 2013 at 12:04
bWare
Lurking Member
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November 2013
5
Lyndel,
Thank you, I found those pages and will read them today.
OP | Post 7 made on Saturday November 2, 2013 at 12:07
bWare
Lurking Member
Joined:
Posts:
November 2013
5
3FG,
Thank you, I think this will help me.
It is a Epson projector that I'm trying to figure out.
I'll try out that IRMaster application.
Thanks again, very helpful.
OP | Post 8 made on Saturday January 25, 2014 at 10:52
bWare
Lurking Member
Joined:
Posts:
November 2013
5
Lyndel McGee & 3FG:
Thanks, sorry for the late reply, but you were exactly right.
This gave me the correct code. (in case anyone else needs it).


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