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Thread: Roll your own XTS USB cable

  1. #1
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    Default Roll your own XTS USB cable

    Guys I wrote a new blog entry and wanted to share it here,
    http://magnusjne.blogspot.com/2013/0...m-devices.html
    If you have any questions or need help with your own cable, use this thread to ask.


  2. The Following User Says Thank You to Magnus For This Useful Post:

    QBFreak (Oct 24, 2015)

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    Freakin' sweet! Thanks for taking the time to share your knowledge with the masses. It's greatly appreciated.

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    Excellent work. I've been patiently waiting on you to post a follow up to the December post. Still lots to learn about one wire.

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    No problem it's nice to have a place where you can share and not be censored. Hopefully we can end up with a complete schematic with part numbers to post in this thread.

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    Nice job and explanation, sure beats the $250 for the cable that Mother is charging!

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    Check out the DS9490R version of the USB to 1-wire adapter. Very versatile with the RJ-11 jack.

    http://datasheets.maximintegrated.co...90-DS9490R.pdf

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    Yeah that would be the one i would order if i was buying one.

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    Awesome work dude.. i wonder what other strings besides USB1 are out there

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    Yeah anyone have a PTR cable handy?

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    Nice work ! Much appreciated.

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    Wow, nice work Magnus! I'm still learning a lot on here, but it's guys like you that make things a lot easier to understand!


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    Thanks for that writeup! I've been tinkering with my TRBO cable but haven't had any luck so far. Have successfully read the chip in it and wrote the contents to a second chip.. but no joy. Need to look a little closer to see what I'm missing.

    Update: Noticed there are some SMD zero ohm resistors on the board of the accessory connector. I'll have to trace these out and see what they do. My homebrew cable, as it stands now, comes up as 'Invalid Accessory' when connected to the radio.
    Last edited by Forts; Jan 04, 2013 at 07:48 PM.

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    Trbo cables are different from the astro25, the data is signed in some way. I haven't got it figured out yet.

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    Thanks for sharing! It's about time this little beast is exposed. (though I've already paid close to $500 for two of the OEM ones)

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    Quote Originally Posted by Magnus View Post
    Trbo cables are different from the astro25, the data is signed in some way. I haven't got it figured out yet.
    There is a lot ('lot' doesn't seem to be the right word to use when it's only a few bytes haha) more data in the TRBO 1-wire chip compared to the XTS chip... The model # of the cable is in there as well a few other ASCII words.

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    Quote Originally Posted by Forts View Post
    There is a lot ('lot' doesn't seem to be the right word to use when it's only a few bytes haha) more data in the TRBO 1-wire chip compared to the XTS chip... The model # of the cable is in there as well a few other ASCII words.
    Correct, I have tried copying the trbo/apx ones and it does not work. However the XTS one I have copied successfully, I just didn't do it 100% proper with the transitor and stuff.