Y
The one I had occasionally didn't want to accept speed settings from the OS.
Also you could try another connection app like
minicom
The connection command would be:minicom -D /dev/ttyUSB0 -b 921600Size: a a a
Y
minicom
The connection command would be:minicom -D /dev/ttyUSB0 -b 921600Y
T
RV
RV
RV
LL
V
V
i
V
V
LL
V
LL
V
V
LL
LL
V