I am trying to configure a Nitrogen 6x board (uses i.MX6 quad processor) running Android 7.1 to communicate with another board via Serial Port. I am getting a permission denied error within the application I am testing when it tries to initialize the port for communication. I am trying to use /dev/ttymxc0 as the port for this. I used adb to see what permissions were defined for that path and was presented with the following:
I tried to modify the permissions to allow root to read and write from the port but received a read-only file system error when trying to do so. Is this an issue that anyone has seen before? If so, would it be possible to get some help in order try and resolve this?