Yes, /dev/modem is the default device. Try something like: minicom -D /dev/ttyUSB0 or, to perform a full setup of minicom: minicom -s On Thu, 18 Feb 2016, ku6v wrote: > This is what I get now. > > minicom: cannot open /dev/modem: No such file or directory > > > > 73 > > Don > > KU6V > > > >