Error opening serial port

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  • May 25, 2023 at 5:51 am #12696
    myscada
    Participant

    I’ve installed RapidScada 5.8.4 on my Ubuntu Server 20.04 successfully. And testing serial port (/dev/ttyS1) with a modbus RTU device via Mbpoll (sudo needed) in Terminal is also OK. But RapidScada responses “Error opening serial port: No such file or directory”. I’m not sure whether it’s the problem about permission.

    May 25, 2023 at 6:06 am #12697
    myscada
    Participant

    I’ve also checked if the serial port (/dev/ttyS1) is occupied by another application by the command of “lsof | grep ttyS1” and it’s OK.

    May 25, 2023 at 9:04 am #12702
    Mikhail
    Moderator

    Hello,
    What username is written in the Communicator log?
    If the port exists, but cannot be open, you would get another error message.
    Could you copy here a part of communication line log?

    May 25, 2023 at 9:08 am #12703
    myscada
    Participant

    Thanks for your reply.

    I made a mistake, the port name should be /dev/ttyS1 instead of com2. Now it’s OK

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