CentOS 7 Add-on Serial Cards

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I’m upgrading from CentOS6 to CentOS 7.

I run 2 weather stations on C6 and have one of them attached to ttyS0
which is on the motherboard, and the other to ttyS2 which in on an add-on PCI serial card.

I’m migrating the weather stations another host running C7 which has a similar hardware configuration.  When I connect the weather station to ttyS0 everything works fine, but when I try to use ttyS1 or ttyS2
nothing happens.

The OS identifies all 3 ports, and I’ve already tried several different serial cards several of the slots on the motherboard all have yielded the same result.  I’ve even gone so far as to try to get this to work on another computer running C7 with the same result, success on ttyS0, but nothing nothing when I try ttyS1 or ttyS2.

I’m thinking that this might be a driver issue, but having used several different cards I’m just not sure.

Any assistance would be greatly appreciated.

Pete

—
Unencumbered by the thought process.
— Click and Clack the Tappet brothers

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4 thoughts on - CentOS 7 Add-on Serial Cards

  • I looked at them with setserial, but I have no familiarity with the program to know what to change.

    setserial -ag /dev/ttyS*
    /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
        Baud_base: 115200, close_delay: 50, divisor: 0
        closing_wait: 3000
        Flags: spd_normal skip_test

    /dev/ttyS1, Line 1, UART: 16550A, Port: 0x8000, IRQ: 17
        Baud_base: 115200, close_delay: 50, divisor: 0
        closing_wait: none
        Flags: spd_normal skip_test

    /dev/ttyS2, Line 2, UART: 16550A, Port: 0x8400, IRQ: 17
        Baud_base: 115200, close_delay: 50, divisor: 0
        closing_wait: none
        Flags: spd_normal skip_test

    /dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3
        Baud_base: 115200, close_delay: 50, divisor: 0
        closing_wait: 3000
        Flags: spd_normal

    I changed the closing_wait: on ttyS1 to match ttyS0, but that didn’t do anything, so there must be more to it.

    Pete

    —
    Unencumbered by the thought process.
    — Click and Clack the Tappet brothers

    —
    This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

  • thought nothing more of it, but now I’m confronted with this issue. Thanks for the info and the links hopefully I can glean something out of it that will solve my dilemma.

    Pete

    —
    Unencumbered by the thought process.
    — Click and Clack the Tappet brothers

    —
    This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.