On Linux, to ensure that Mu to operate with the MicroPython based devices you'll need to ensure you add your self to the correct permissions team (usually the dialout or uucp teams). Also Guantee that your distribution quickly mounts flash equipment, or Make sure you mount them manually. The https://eduardojsydg.tblogz.com/mu-online-season-20-no-further-a-mystery-49644741