pi-otg

raspberry pi loadout for led and pushbutton control while on the move

Use case:

Drive around town with your raspberry pi and push a gpio-connected button to run your script.
For when a single button is easier to use than bringing a keyboard & screen.

Setup:

Make "main.sh" (symlink) point at the script you want to run when you push the button (from /scripts/).
Make "interface.sh" (symlink) point to the script in /interfaces/ that defines the button/led behavior you want, connect pushbutton and LEDs to appropriate gpio pin.
set up systemctl to keep interface.sh running:
- copy pi-otg.service to /etc/systemd/system
- run the service, this should make it stay on across reboots: sudo systemctl start pi-otg.service
- check the service is running: sudo systemctl status pi-otg.service
reboot pi, push the button, your script will run

Flow of control:

systemctl runs "pi-otg.service" at boot, which is responsible for keeping "interface.py" (symlink to the interface script you really want) running at all times.
"interface.py" polls on GPIO and calls "main.sh" (symlink to the actual desired payload script) when the desired trigger is met (gpio, time, gps, whatever).
'main.sh" carries out the system functions when in the triggered state.

Project layout:

interface.py and main.sh are symlinks that you alter when you want a different IO interface or executable script
the interfaces and scripts folders have interfaces and payloads to choose from

Documentation:

This readme
further detail is based in the .docx at top level, although the project has grown from that doc and deviates some names and details

Dependencies:

Future:

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