Document reverse camera usage + requirements in readme

[soupy-boy]

Its unclear how a reverse camera can be used when reading through the readme. This would help me a lot in deciding how I want to use LIVI and what I need to start my project.

[f-io]

Hi @soupy-boy,

Settings → General → Tab Settings → Reverse Camera → Camera → select the detected camera.

I've tested a few USB webcams and action cameras. If you have a case where the camera is not detected, we can try to debug it. I know there is defacto no documentation atm, but that's mainly because there are still a lot of changes happening, and any documentation quickly becomes outdated.

[soupy-boy]

Alright I appreciate your response I'll give that a shot.

[niz93]

what is the reverse gear trigger?

[Oostblok]

So far as I could tell currently it works automatically when a camera becomes available and the autoswitch boolean is set to true, as can be seen here; https://github.com/f-io/LIVI/blob/main/src/renderer/src/App.tsx#L263.
You could use the view field out of the telemetry module to switch over to the camera view but you'd have to remember the current view somehow to nicely revert back to the view you were using. I didn't explore it enough yet but I'd say the cleanest way to do it would be to setReverse in the store.

[f-io]

pnpm --dir scripts/tools telemetry:set gear=R | pnpm --dir scripts/tools telemetry:set gear=-1

LIVI will store the current page, on next pnpm --dir scripts/tools telemetry:set gear=P|1|2... it will auto switch back to that stored page.

As @Oostblok mentioned pnpm --dir scripts/tools telemetry:set view:camera will work as well, I may add a bidi API later so you could read the current state externally.

[Oostblok]

Thanks for that message, I was overthinking it. I wrote a small/simple python script that sends the gear=-1 signal to the telemetry socket when entering reverse (gpio 7 triggered in my case) and then just sends gear=1 when leaving reverse. Seems to work very well on my benchtest setup. I used gear=1 because I haven't figured out a good way to get OBD data from my '05 subaru legacy yet.