I hard-coded everything in the script. That includes the played sound,
/usr/share/sounds/question.wav, and how to play it, with aplay, which can
only play raw formats. You can modify both lines "aplay
/usr/share/sounds/question.wav" (and even play a different sounds, depending
on whether the battery became low or high). For example, to play the far
more noticeable /usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
file with paplay (which can play that file format and more):
paplay /usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
We can change the script so that the file(s) to play, the two thresholds, the
check period, ... become arguments. Since you will not run the command by
hand, it does not look very useful to do so, in my opinion.
notify-send (on the two previous lines) is supposed to send a notification.
It works on GNOME Shell. I am surprised it does not work on MATE. Try to
execute the following command in a terminal emulator:
$ notify-send banana
Is "banana" displayed in a notification? If not, any error message?
