In windows,luars232 can not open "COM24" but can open "COM4"

[zhangchunlin]

I can not open "COM24" with luars232,but when I change the com port name to "COM4",luars232 open successfully.And I can open "COM24" with HyperTerminal (hypertrm.exe).

I examine the code of luars232,but have not found the reason,and I have not VS2005,so I just submit this issue here.

Thanks.

[ynezz]

Hi,

Windows is crappy in this, serial ports 1-9 are valid names, but for ports above you need to use UNC name of the device - \.\COMxx, so please try to open the port with "\.\COM24" as device name and let me know if it helped. Thanks.

-- ynezz

[zhangchunlin]

I try "\.\COM24" in lua,and it is opened successfully.Thank you very much,before you told me,I have no idea with the UNC device name.