FE v0.0.1 - Startup and shutdown with UPS

[ivogeorg]

Description

1. Setup:

   1. Latest Raspbian OS image on Micro SD card.
   2. Python 3.9+.
   3. Connect UPS.
      Note: There are no batteries in the UPS and the Qwiic hat with the attached sensors are not needed.

2. Single process, single thread.

3. Procedure:

   1. Turn on the UPS by pressing the blue button on the side of the batteries. This starts the RPi.
   2. Run fexecutive.py.
   3. It shuts down the RPi.
      1. Use Python subprocess package (from subprocess import run).
      2. Invoke run("shutdown --poweroff now", shell=True).
   4. Hold down the blue button of the UPS until it shuts down. The green battery lights remain on.

Knowledge

1. Python subprocess package.
2. Linux shutdown commands.

Deliverables

[ivogeorg]

Completed

1. Power on UPS and RPi.
2. Shut down RPi.
3. Shut down UPS. The green lights remain on but turn off after a while.