On Mon, Mar 07, 2022 at 10:43:03PM +0100, Max Staudt wrote: > + sudo ldattach \ > + --debug \ > + --speed 38400 \ > + --eightbits \ > + --noparity \ > + --onestopbit \ > + --iflag -ICRNL,INLCR,-IXOFF \ > + 29 \ > + /dev/ttyUSB0 I think you mean "30" here, not "29", right? thanks, greg k-h