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Create physical comport

Discussion in 'NEO Z83-4' started by marektyc, Oct 5, 2017.

  1. marektyc

    marektyc New Member

    For an specific application we have tried to use an USB->RS232 converter to hookup some specific research hardware. This USB->RS232 converter generates errors.
    After some research we conclueded this error is genereated by the converter.
    Once we use a onboard COMPORT it works fine.

    Dispite there is a COMPORT in the Windows hardware manager. the system has no physicial COM R232 connection available.
    If available; which pins can I use to create a physical comport from?

    note; yes, i'm aware of the fact that the warranty will be void once opening the minux.

    image_20319.jpg MINIX-NEO-Z83-4_Board_Bottom_Large.jpg

    Thanks for your reply !
  2. marektyc

    marektyc New Member

    We have successfully managed to create an external COM/RS232 port using the JDEBUG1 port.

    We used a small print with some components to upscale the TTL voltage from 1.8v to 3.3 and
    and use a RS323 chip to create the COM-port.
    We needed a 5v to supply the RS232 chip from power, which we borrowed from an USB port.

    Put it it all in a box and ready to go !