doma@nappali:~> echo -ne ':V#' > /dev/ttyUSB0

gets me

doma@nappali:~> cat -v < /dev/ttyUSB0
V1.00#

But this does not seem relevant to me.

As said before I used a DSO to confirm that indi is doing nothing on the line. (DSO=Digital Storage Oscillloscope)
The scope captures the waveform on the physical RS232 line and decodes it to ASCII data for me.

When it was indi's turn to drive the serial line it did nothing. How can you debug that? How can one confirm that it actually tries to write to /dev/ttyUSB0? How can you explicitly tell it to use that block device?

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