dependencies.txt

python 3.7 (3.8 not yet supported by cef)
(e.g. *ubuntu 18.04)

apt:
python3-pip
python3-tk
libasound2-dev (https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/264534)
libpython3-dev

wmctrl
chromium-browser

pip:
pyalsaaudio
cefpython3
dataclasses
pyserial
mouse

Microphone problems in chromium?
try changing the input settings a bit in the systems sound settings
for me either alsamixer or pulseaudio helped (apt install)

Add udev rule so that the buttons always have the same device name:
copy 11-arduino_clone.rules to /etc/udev/rules.d/
(change vendor and product id accordingly (lsusb))

add user to dialout group to allow serial access:
sudo usermod -a -G dialout $USER

restart after the group add (actually re-login)

make powerbutton shutdown without asking:
e.g. powersettings
in lubuntu 18.04:
also comment out
<!--  <keybind key="XF86PowerOff">
    <action name="Execute">
      <command>lxsession-default quit</command>
    </action>
  </keybind>-->

in ~/.config/openbox/lubuntu-rc-xml


maybe for later (e.g. programm triggered reboot):
let user reboot / shutdown without sudo rights
create /etc/sudoers.d/reboot_privilege
with
<user> ALL=(root) NOPASSWD: /sbin/reboot /sbin/shutdown
and change file mode to 0440