pdd.sh
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not working well on freebsd
Don't know what the issue is yet but it basically only starts to work then gets stuck on freebsd. Maybe timing.
It's some problem with the tty blocking, not timing. After getting one successful transaction like the status command, we can't send again. A logic analyser shows that the TX line doesn't change. But do a com_close and then com_open and the tty immediately both sends and receives stuff that was blocked up previously.