Changes in version 3.1.1 (2026-06-04)                  

    o   update maintainers address

    o   bug fix with listPorts() on Windows systems never attached to a serial port.

    o   fix S3 object class issues 

                  Changes in version 3.0 (2020-05-14)                   

    o   bug fix with connection names on MacOS

    o   introduce print()- and summary()-function

    o   if read() produces a zero length object it now returns empty string '' in ASCII mode and NA in binary mode

                         Changes in version 2.1                         

    o   bug fix with connection names on Linux

                  Changes in version 2.0 (2018-12-05)                   

    o   enable binary mode

    o   introduce flush()-function

    o   introduce nBytes()-function

                         Changes in version 1.0                         

    o   initial release

    o   ASCII-based communication