How to Connect to a Console Port on ASIC Miner Unit via RJ11-6P Port?

I am trying to connect to a console port on an ASIC Miner Unit (Spondoolies SP10) which has an RJ11-6P Port. From what I’ve been able to research about the configuration of the port, Pin 2 – Tx, Pin 3 – Rx, Pin 5 – Gnd.

In order to connect to this, I have an RJ11 6P Jumper going to an RJ11/12 F to DB9 M adapter, wired Tx > Rx and vice versa for the RS-232 pinout, connected with a db9 (M/M) jumper, into a PL2303 (TA) RS232M to USB 2.0 Adapter.

The miner uses 3.3v logic, works at a 115200 baud rate, has no flow control (HW or SW) and has an 8/1 bit configuration, and the chip in the USB to Serial Adapter can work at either 3.3v or 5v. As of yet, however, I’ve been largely unsuccessful in getting anything on the console. Am I missing something in this configuration, or do I just need to grab a volt meter and start checking ports?

How to Connect to a Console Port on ASIC Miner Unit via RJ11-6P Port?

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TroubleShooting 18 Answers 257 views 0

Answers ( 18 )

  1. Mason Conn
    0

    Sometimes Rx and Tx can be mixed up and have the convention where Rx means to connect that to the Rx of the other device. So try swapping Rx and Tx around.

    • Florian Monahan
      0

      The PL2303TA is supposed to have that portion covered. As for the Tx/Rx, they were actually oddly clear on their meaning “e.g. Rx (Data going into the device),” but I had tried to swap Tx/Rx in my terminal client application with no success and that’s where I get a bit fuzzy, I’ve seen the null modem configuration, but the swap is just the send/receive for practical purposes, not sure the significance beyond that (the send on one is received by the other).

      • Prof. Tremaine
        0

        You could double check that you’re counting the pins correctly on the RJ-11. I use the following method to determine pin 1.

        Point the plug at your face with contacts facing up and he tab facing down. The leftmost contact is pin 1. Wire colors I consider arbitrary.

        • Florian Monahan
          0

          Yeah I know that is true, but with as scant as documentation actually is, I may just need to check and make sure the initial information is correct, I was just putting off finding my volt meter… (being lazy)

  2. Ansley Herman
    0

    It’s also possible the Spondoolies is borked. Find another known good serial device to test your rig with and eliminate the miner from the equation until you have all your wiring harness and USB-PL2303 confirmed working.

    • Florian Monahan
      0

      You’re probably right.

  3. Rudy Nitzsche
    0

    5v and is there any hardware handshaking that it needs doing? RTS/CTS?

    • Florian Monahan
      0

      the speed for this connection is supposed to be 115200.

  4. Florian Monahan
    0

    So, on the 3.3/5v issue, I can’t say how they have the PL2303TA chip wired (didn’t want to tear apart a new adapter cord just yet), but it should be adaptable with the Tx voltage when configured properly. As far as handshaking goes, it was not particularly notated, but seeing as there is neither HW or SW flow control, likely not.

    • Prof. Tremaine
      0

      The USB serial adapter would be a standard pinout, just don’t confuse the male/female pinouts as their mirror images of one another.

      • Florian Monahan
        0

        I know that’s right, I had to twist it about in my head once or twice to make sure I was looking at it right, that’s where the little diagram came into play.

        • Judd Emard
          0

          You’ll probably need this, SF Cable, DB9 Female to RJ12 Modular Adapter Gray – 

          • Florian Monahan
            0

            yeah… I know. I got home, looked at the stuff I bought, thought about it, kicked myself, and proceeded to buy a serial cable jumper from a thrift store for a buck instead of driving back to admit failure in cable design… (before anyone asks, yes the Thrift Store Cable is good.)

            • Marcelo
              0

              My fav answer in this thread is the one about setting the speed like using hyper terminal or putty.

  5. Bernie Steuber
    0

    Did you try swapping (null modem)?

  6. Johan Keebler
    0

    Sometimes I have had systems where data set ready and or data terminal ready had to be pulled down and couldn’t be left floating. YMMV

  7. Adolph Sporer
    0

    As you are connecting two hosts together use a null-modem!

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