Currently I'm a bit uncertain on how to proceed. OpenUpload it's old, and I have not had much time to develop it further. Though porting it to PHP7 should be pretty simple. I also considered doing a rewrite using yii2 framework and html5. I only need to find some time and love for the project again. There are so many alternatives out there that I'm not sure it's worth the job.
BTW component comport (can be found on SF) works without any problem.
I can also add that using a com port (the example provided too) in a remote desktop session (with Windows 7, but probably with other versions too), the application raises an exception when opening the port.
check your paths, there's something wrong with the configuration.
It's possible, buy you'd need to implement it :)
send files 300 MB
if you look around you should find this pretty easy. Check php file_upload limits...
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