Issue running Serial under root in Raspberry PI

Question

Issue running Serial under root in Raspberry PI

xianrecords2015 opened this issue 5 years ago · 1 comments

xianrecords2015 commented 5 years ago

I am having a strange issue. When I run my compiled c++ program under my user, the serial communication works fine.

But when I include the program in a rc.local or if I run the program under sudo (root), then the serial communication no longer works.

I am running on a Raspberry PI 4, Raspian.

Answer 1 · 2021-06-10T22:36:02.000Z

I don't know why that would be an issue (especially as root), but if it were in fact running under a user and that user wasn't in the correct groups that might be the issue. I'm going to close this for now, since I cannot easily reproduce it.