JP1 Remotes

alanrichey · Expert Joined: 24 Mar 2008 Posts: 3529 Location: UK/USA

I am just trying to 'learn' the codes for a Humax JC-5100. IRScope is coming up with:

Protocol: Kaseikyo-1.170
Device: 10.18
E 8

But in RM the options are (with my guesses in brackets):

OEM1 (1 ?)
OEM2 (170 ?)
Device (10 ?)
SubDevice (18 ?)
E (8)
LeadOut (ms) (??)

Can anyone confirm or add to that ?

Thanks

Al

vickyg2003 · Posted: Wed Jun 27, 2012 7:19 am Post subject:

Hi Alan,
I can confirm you have the device, subdevice, and E part correct. I assume the OEM are in the correct order, but don't know for sure, and can't test because I'm a little under the weather.

For the leadout time, look at the IRP form, and then pick the number closest to the number that I've highlighted in Red.

{36.7k,437,msb}<1,-1|1,-3>(8,-4,A:48,1,-74.8m)+{A=$455401E88861}; Alt leadout form: ^136m

Hope that helps.
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The Robman · Posted: Wed Jun 27, 2012 7:24 am Post subject:

I think it would be helpful if we could see the actual ICT file with the learns.
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alanrichey · Expert Joined: 24 Mar 2008 Posts: 3529 Location: UK/USA

Sorry, just back from a trip and the power is out after the Virginia storms. I'll do it as soon as we get power back. (Thank to Staples for their free WiFi hotspot Smile

)

alanrichey · Expert Joined: 24 Mar 2008 Posts: 3529 Location: UK/USA

Back in the land of the living now Very Happy

Sample ICT file at http://www.hifi-remote.com/forums/dload.php?action=file&file_id=11050 It has the 10 numeric keys.

Al

The Robman · Posted: Tue Jul 03, 2012 8:02 am Post subject:

I was just reading in the paper this morning that there are 1.8 million still without power due to the various storms. I can't imagine not having A/C in this heat.
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vickyg2003 · Posted: Tue Jul 03, 2012 8:03 am Post subject:

Ah, we just had these signals for a SKYPERFECT. I wrote a little protocol with the checksum hardcoded, but looks like this is going to be an up and coming thing, perhaps the protocol should calculate the checksum. I'll see if the checksum works out the way Rob calculated it and get back to you.

alanrichey · Expert Joined: 24 Mar 2008 Posts: 3529 Location: UK/USA

vickyg2003 · Posted: Tue Jul 03, 2012 9:01 am Post subject:

Oh that's right, you were wifi-ing from Starbucks.

Glad you are back.

I really thought I could figure out the xsum, but I just don't have the mathpower for this. We'll have to wait until someone with binary math skills can decipher this. Rob gave me a spreadsheet to look at on the skyperfect, but that's like giving calculus to a preschooler and expecting them to get it. When your brain scrambles numbers and letters, its extremely hard to decipher binary math.

Rob, 3FG, can someone do the math on these?

Any budding enthusiasts? Rob posted a spreadsheet for the skyperfect signal. these are going to be similar. You take the 1.170.10.18 figure out the binary, and then stick it into the reverse the order (LSB).

The skyperfect file is here http://www.hifi-remote.com/forums/dload.php?action=file&file_id=11018

The Robman · Posted: Tue Jul 03, 2012 1:59 pm Post subject:

Have you already converted these signals to binary Vicky? I tried to export a UEI file from the ICT file but it didn't work and it's too time consuming for me to convert times to binary when I can't use the rounding feature in IR.exe
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Rob
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vickyg2003 · Posted: Tue Jul 03, 2012 3:47 pm Post subject:

The Robman · Posted: Tue Jul 03, 2012 7:26 pm Post subject:

The checksum is just the OBC byte XOR'd with 00011000
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Rob
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Please don't PM me with remote questions, post them in the forums so all the experts can help!

vickyg2003 · Posted: Tue Jul 03, 2012 8:18 pm Post subject:

So Rob, we've had two of these in the last two weeks.

As far as decoding, didn't you say something about this relating to bytes 2 and byte 3 of the being involved in getting this xor'd value? Do those rules still apply?

The first time we saw this protocol, I just hard coded the xored value. Should I be adding this xord value as another fixed variable? Or should I be doing a calculation of bytes 2, and 3 to get the xor'd value on the fly. What's best based on your experience?

I would like to make this more useful in the future.
_________________
Remember to provide feedback to let us know how the problem was solved and share your upgrades.

Tip: When creating an upgrade, always include ALL functions from the oem remote, even if you never plan on assigning them to a button. Complete function lists makes an upgrade more helpful to others.

The Robman · Posted: Tue Jul 03, 2012 9:47 pm Post subject:

Yup, the checksum pattern here (ie, 00011000) is also derived by XORing the 3rd and 4th bytes just like last time. (ie, 01010000 and 01001000 XOR to become 00011000)

So yes, don't hard code it, use code to derive it.
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Rob
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Please don't PM me with remote questions, post them in the forums so all the experts can help!

3FG · Expert Joined: 19 May 2009 Posts: 3367

I think we've had some confusion between the Humax and SkyPerfect IR signals.

The two learns of OBC 3 differ in the third byte: