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Thread: USB to RS-485 used to reverse engineer something?

  1. #1
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    Default USB to RS-485 used to reverse engineer something?

    Can I use one of these connected in line between two pieces of equipment to see what the data being send looks like, like a port sniffer? I'm going to need one anyways for my renard 64.
    5 houses using:
    Renard 64, 3 Ren24's, Ren8
    4 E682 pixel controllers
    2,300 WS2801 pixel nodes
    1200 dumb RGB
    Sequenced using LSP 2.5

  2. #2
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    Default Re: USB to RS-485 used to reverse engineer something?

    I don't believe you can put on a port sniffer. This is a RS232 to 485 converter. YOu could monitor at the screw terminals if you have the equipment.
    More channels then I can use.
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  3. #3
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    Default Re: USB to RS-485 used to reverse engineer something?

    What I was thinking of doing was using this plugged into my computer. Then connect the data wires to it and use hyperterminal to view commands and maybe send some of my own. I'm just not sure if it will work being a third device . Are you suggesting that I could just get a DB9 connector from my laptop and hook it directly to the data wires and read it that way?
    5 houses using:
    Renard 64, 3 Ren24's, Ren8
    4 E682 pixel controllers
    2,300 WS2801 pixel nodes
    1200 dumb RGB
    Sequenced using LSP 2.5

  4. #4
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    Default Re: USB to RS-485 used to reverse engineer something?

    you will need something that will read the rs485 data.

    What are you trying to figure out.
    More channels then I can use.
    More light bulbs then I care count.
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  5. #5
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    Default Re: USB to RS-485 used to reverse engineer something?

    I wanna see if the data matches the protocol that they define here in the serial adapter manual. If so, I would assume that the adapters they sell for $350 are nothing more than an RS-232 to RS-485 adapter. Do you think there is anything special going on in this adapter? They also make a USB to RS-485 adapter for $200. This comes with a bunch of simple emulators that emulate their physical control panels. This is a link to the emulators. It's a just a self-extracting .exe. There will be about 15 different emulators but they all probably do the same basic stuff. I wonder if I can hook something up to my com port and see the data that the emulators are sending.

    I appreciate all the help I can get on this. I know it's not blinky flashy related, but I'm trying to learn everything I can with as many fun projects as I can think of and everyone here is so helpful, I figured I'd give it a shot. I've posted on rs-232 forums and never get a reply. They don't seem to wanna help newbies. It will help me with blinky flashy in the long run. And then maybe someday I will be able to contribute something cool.
    Last edited by n8huntsman; 01-06-2011 at 03:01 PM.
    5 houses using:
    Renard 64, 3 Ren24's, Ren8
    4 E682 pixel controllers
    2,300 WS2801 pixel nodes
    1200 dumb RGB
    Sequenced using LSP 2.5

  6. #6
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    Default Re: USB to RS-485 used to reverse engineer something?

    Yes there is something special going on in the adapter. It even talks about the buffering it does internal to the Adapter. It is not just a rs232-rs485 adapter.
    More channels then I can use.
    More light bulbs then I care count.
    [url]http://www.vimeo.com/user1106747/videos[/url]

  7. #7
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    Default Re: USB to RS-485 used to reverse engineer something?

    Darn! So you think I'd have to buy it? If that's the case I'm leaning towards the USB model due to the cost. With this I'll be able to use the emulators. From there I don't think it would be too difficult to learn how to make a simple web server that can send and receive those commands. That would give me the ability to send and receive data from my phone and my wifi enabled home automation remote. Does this sound like the best way to tackle this?
    5 houses using:
    Renard 64, 3 Ren24's, Ren8
    4 E682 pixel controllers
    2,300 WS2801 pixel nodes
    1200 dumb RGB
    Sequenced using LSP 2.5

  8. #8
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    Default Re: USB to RS-485 used to reverse engineer something?

    You can always give it a try. The more I look at the Document the more I think the buffer is in the control unit and not the adapter. Try an rs-485 adapter and see what you get. Just try not to burn up your Pool control unit.

    If you look on Page 8 you will see the Adapter in question changes RS232 data to RS485. D+ is Pin 2 and D- is pin 3.

    So I take back my above comments and say it should work.
    Last edited by RichF; 01-06-2011 at 08:52 PM.
    More channels then I can use.
    More light bulbs then I care count.
    [url]http://www.vimeo.com/user1106747/videos[/url]

  9. #9
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    Default Re: USB to RS-485 used to reverse engineer something?

    The adapter is on its way from Hong Kong. I don't think I need to power anything since the controller is already powered. Hopefully that will reduce the chances of blowing anything up. We'll see what I get. I will keep you informed. Thanks again for the help.
    5 houses using:
    Renard 64, 3 Ren24's, Ren8
    4 E682 pixel controllers
    2,300 WS2801 pixel nodes
    1200 dumb RGB
    Sequenced using LSP 2.5

  10. #10
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    Default Re: USB to RS-485 used to reverse engineer something?

    Hopefully that will reduce the chances of blowing anything up. We'll see what I get. I will keep you informed. Thanks again for the help.
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