it seems that I accidentally found a way to make my two Arduino nano clones run without resetting on serial connection close/reconnect. On one hand, this behavior is much closer to the desired behavior and on the other hand it feels hackish, because I don't know the cause yet.
The devices are still able to be flashed with new firmware
I assume that it has to do with the usage of
socat as proxy for the devices in question. The described behavior was first observed after playing with
socat. The command that finally worked for me:
/usr/bin/socat -s -d /dev/ttyACM3,b115200,cs8,parenb=0,cstopb=0,clocal=0,raw,echo=0,setlk,flock-ex-nb,nonblock=1 PTY,link=~/.pyduin/ttyACM3.tty,b115200,cs8,parenb=0,cstopb=0,clocal=0,raw,echo=0,setlk,flock-ex-nb,nonblock=1
An Arduino Uno with the exact same firmware/treatment does not show the same bahavior.
Any ideas what had gone wrong? And how to restore the default FTDI behavior?