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Topic:
Strange 16 bits IR codes .. wich Makehex format ?
This thread has 4 replies. Displaying all posts.
Post 1 made on Sunday January 18, 2009 at 05:16
laurent_michel
Lurking Member
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January 2009
4
Hi

I've been given a PLUS U5-112 DLP projector ... but with no remote control.

PLUS America sent me those IR codes :
Power 14 EB
Up 5E A1
Menu 46 B9
RGB 4 FB
Left 5D A2
Enter 17 E8
...

I believe these are 4 HEX digits = 16 bits codes ...

I've been through all Makehex formats, and they all use a 8 bits "function" code. Shall i use the device code for the first 8 bits ? No success so far.

Well.. i am lost! Any idea on how to handle those codes ?
OP | Post 2 made on Sunday January 18, 2009 at 06:40
laurent_michel
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January 2009
4
I've found a CCF file with a PLUS DLP projector (not my model). Only very few codes work with mine.

Below a learned code that works with my U5-112, that's the "Power OFF" discrete code :
0000 006c 0022 0002 0156 00ab 0016 0016 0016 003f 0016 003f 0016 0016 0016 0016 0016 0016 0016 0016 0016 003f 0016 003f 0016 0016 0016 003f 0016 0016 0016 003f 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 003f 0016 0016 0016 003f 0016 0016 0016 0016 0016 0016 0016 003f 0016 003f 0016 0016 0016 003f 0016 0016 0016 003f 0016 003f 0016 003f 0016 0648 0156 0056 0016 0e5c
Post 3 made on Sunday January 18, 2009 at 08:23
Jasonvp
Select Member
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July 2008
2,404
They have not given you the complete Hex code.They only has the Function number and no device number.But for the Power OFF you posted it is,

Protocol: NEC1
Device:134.21
Function:20

Power 14 EB = 20
Up 5E A1 = 94
Menu 46 B9 = 70
RGB 4 FB = 4
Left 5D A2 = 93
Enter 17 E8 = 23


Should work for Makehex.

Last edited by Jasonvp on January 18, 2009 08:30.
OP | Post 4 made on Sunday January 18, 2009 at 09:19
laurent_michel
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January 2009
4
Jasonvp : i just don't know how to thank you !

You've just solved a pb i've been around for 3 weeks ...

I'll post the CCF file for my device

Thanks again!
Post 5 made on Sunday January 18, 2009 at 09:29
johnsfine
IR Expert
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Posts:
September 2002
5,159
Jason answered well enough, but I'll add some detail anyway.

On January 18, 2009 at 05:16, laurent_michel said...
I believe these are 4 HEX digits = 16 bits codes ...

Actually they are 8 bit function numbers with another 8 bits as a check byte. That is typical.

I've been through all Makehex formats, and they all use
a 8 bits "function" code.

MakeHex can use over 8 bits for function and a few .irp files do. But when there is a check byte, the .irp file includes the logic to compute its value.

Shall i use the device code
for the first 8 bits ?

They didn't tell you the device code, nor the protocol, which would be a problem if you didn't have Pronto Hex for some signal of the same device

On January 18, 2009 at 06:40, laurent_michel said...
Below a learned code that works with my U5-112, that's
the "Power OFF" discrete code :

Does it work as a "power off" or a "power toggle"?

I don't have decode software handy. I trust Jason's decode of that as function 20, which matches what you posted first as "power", not as "off".

On January 18, 2009 at 08:23, Jasonvp said...
Protocol: NEC1
Device:134.21

So if you use MakeHex, you would use nec1.irp and set device=134.21

Up 5E A1 = 94

In each of those codes the first byte (such as 5E) is the function number in hex. Convert that to decimal to get the function number used with MakeHex. 5E hex is 94 decimal. Ignore the second byte (A1). If you care the second byte is always FF hex minus the first byte (FF minus 5E equals A1).


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