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J2 looks like serial port

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  • paulbart1234
    I think J2 on the board is a TTL-level serial port (with power+gnd). I ve just measured the pins on an oscilloscope. Pin 3 is definitely sending out serial
    Message 1 of 1 , Aug 10, 2004
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      I think J2 on the board is a TTL-level serial port (with power+gnd).

      I've just measured the pins on an oscilloscope. Pin 3 is definitely
      sending out serial data (TXD). Pin 1 looks like 3.3V, and pin 4 is
      GND. I would guess that pin 2 is RXD.

      I'll wire-up a header and plug-in a TTL->RS232 level shifter and see
      what I find.

      - Paulb
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