Install minicom on your Debian¹⁾, if you haven't already:

sudo aptitude install minicom

Plug in a USB serial port from the Debian machine to the USB-C power/serial module on the SST-6809.

Add your account to the “dialout” group for TTY device access

sudo usermod -a -G dialout youraccountname

You may need to log out and log back in to make the dialout group active for your session.

On the Debian machine, hunt down your USB device pathlist:

ls -l /dev/tty*

Start minicom with the command line option “-D path” of your USB port device name:

minicom -D /dev/ttyUSB0

Configure minicom terminal timings for 1ms per character and 1ms line ending delays:

[CTRL]+[A] [T]
[D] [1] [ENTER]
[F] [1] [ENTER]
[ENTER]

Create a run-control file to start minicom with these terminal timings every start:

[CTRL]+[A] [O]

Arrow key down and choose “Save setup as dfl” to create this run-control file:

~/.minirc.dfl

# Machine-generated file - use setup menu in minicom to change parameters.
pu msg_ch_delay     1
pu msg_nl_delay     1

Exit the setup menu.

Press the RESET button on the SST-6809 and minicom should show:

ASSIST09
>

Return to SST-6809