How to use INSTRFIND to determind device

when i run my simulink, i got a erro

Open failed: Port: COM4 is not available. Available ports: COM1, COM2, COM 7.

COM7 is my arduino

then i type: >>instrfind

>>s = serial('COM7')

>>fopen(s)

the result:

      Open failed: Port: COM7 is not available. Available ports: COM1, COM2.

my arduino connected with PC. help me, thanks.

Answer 1

[Sreeram]

Hi tien,

Could you please check if the drivers have been installed correctly and then restart MATLAB and try again ?

Thanks, Sreeram Mohan