4 ms·

A battery and something that detects the power has been cut off and does a shut down/standby. Rpi startup takes a little while, so I don't know how nice it wou

• thr0awaz 9y ago
  It's not a big job to wire the detector you're talking about in your first sentence - it's more or less a relay and a capacitor (albeit a big capacitor, or maybe a battery if you put some more wiring and a charger in the circuit) For the second one... you'd need to maybe consider tapping into the CAN bus and listening for a door unlock event, then powering up off that, and/or stripping everything out of the kernel and services that isn't needed... you could probably get that boot down to 10-15 seconds
  • bigiain 9y ago
    Pretty sure he's already done that second part. The linked "features demo" video on youtube shows it booting into the Crankshaft app from power on (through Rasbian Lite) in ~11 seconds. https://www.youtube.com/watch?v=tFEpfuDBDjM&feature=youtu.be https://www.youtube.com/watch?v=tFEpfuDBDjM&feature=youtu.be
• rkangel 9y ago
  If you watch the video, the bootup time of the distro involved is significantly less than one minute - more like 10 seconds in fact.