Error: "Unable to find valid certification path to requested target"

I have a problem when I am trying to install Arduino hardware. I can't install from the internet or download from the internet. Could you help me solve it? Thank you very much.

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/293234-why-do-i-receive-a-pkix-error-when-installing-the-rtl-sdr-support-package

[Phuong Nguyen]

i can't find the folder rtlsdrradio_download even though i done step by step

[Walter Roberson]

You would go into the Documents/MATLAB/SupportPackages/R201xx/downloads/ folder appropriate for the package you are trying to install.