[Octave-bug-tracker] [bug #59581] (instrument-control) serialport error after second call

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?59581>

                 Summary: (instrument-control) serialport error after second
call
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 01 Dec 2020 12:54:37 AM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: Jens Bongartz
        Originator Email: bongartz@hs-koblenz.de
             Open/Closed: Open
                 Release: 6.1.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

Hello!

I tested Octave 6.1.0 (Windows 8.1 and 10) with the instrument-control package
(0.6.0) to receive data from a connected Arduino via serialport(). First
initalization of serialport works as expected. After closing (clear)
serialport a second call to serialport leads to one of the following errors:

serialport: Error opening the interface: Illegal byte sequence
serialport: Error opening the interface: No such file or directory

It seems that the serial port of the computer remains blocked after closing
because other application can also not access the serial port. Closing of
Octave releases the serial port and access is regained. 

With Octave 5.2.0 and instrument-control (0.6.0) the problem does not occur.

Best regards
Jens Bongartz






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