I’m trying to connect to the serial port on a board of mine that uses the CP210 serial kernel driver. I can receive fine but for some reason, some common dial-in programs (minicom, cu) refuse to send input. I did get it to work with Emacs’ serial-term mode.
Perhaps the device node is being mishandled, maybe being used at one interface level by minicom and cu while Emacs uses it at another (more raw or something)? Incorrect ioctls… bad enumeration… not sure but I’ve seen this problem with some terminal programs.