How can I get the available serial com port automatically?

Question

MD RAQUIBUZZAMAN 2018-9-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/417937-how-can-i-get-the-available-serial-com-port-automatically

评论： Walter Roberson 2019-5-28

After using this command instrhwinfo ('serial'), I get the available serial port name. Then I have to manually input it like- s = serial('COM5','BaudRate',9600). But how Can I automatically detect and use it without any manual edit inside the code?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2018-9-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/417937-how-can-i-get-the-available-serial-com-port-automatically#answer_335792

在 MATLAB Online 中打开

info = instrhwinfo('serial');
if isempty(info.AvailableSerialPorts)
   error('No ports free!');
end
s = serial(info.AvailableSerialPorts{1}, 'BaudRate', 9600);

Unfortunately it would be common that this will not do what you want. Typically you want to find the serial port that a specific kind of device is on, not just any available serial port. Like if you have an older system that has a PS2 mouse connector no longer in use, that might show up as a serial port like COM2, but you would probably be more interested in finding an arduino or serial over USB port.

Perhaps https://www.mathworks.com/matlabcentral/fileexchange/45675-identify-serial-com-devices-by-friendly-name-in-windows might help.

2 个评论
显示无隐藏无

Jack Nguyen 2019-5-28

在 MATLAB Online 中打开

so if I would like to use the output answer to input data and graph, what will be the way to do it in my code?

I was trying to write:

info = instrhwinfo('serial');
if isempty(info.AvailableSerialPorts)
   error('No ports free!');
end
s = serial(info.AvailableSerialPorts{1}, 'BaudRate', 9600);
open_data = fopen(s)
line = fgetl (open_data)
scan_line = sscanf (line, '%f,%f,%f) (depending on the output)
% it returns as too many argument open_data = fopen(s)