A simple data visualization tool for the Raspberry - write your own python script to monitor whichever data you can think of.
rpi-monitor sits transparently above GUI applications without disturbing their visibility.
To run the monitor,
sudo systemctl enable rpi-monitor and/or
rpi-monitor-bcm, then start manually or reboot the PI.
Albert Casals, 2016-2017.
Graphics portions in directory "common" from Andrew Duncan - Read the LICENSE file for details.