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Reading this thread I found out that you can power on the rpi from idle by connecting gpio3 (pin5 revB) to ground, tested it and it works great.

I didn't read that anywhere else, including in the basic or detailed gpio documentations so i was wondering where it was documented.

And if it's actually undocumented, if there's a source for undocumented gpio features on the rpi?

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So far I only knew you could power it on from idle using the unpopulated reset pins but as it acts as a true reset switch and I don't want to use that as a power button.

Well I now have an onboard power button, with the help of a shutdown pyhton script which I was already using, fantastic.

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eldon
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2 Answers2

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It's called "wake from halt". Some info can be found at here. This feature is implemented in the bootloader.

Ghanima
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Gerben
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0

When the pi is halted using sudo halt or similar, pulling pin 5 low will make it boot up again. https://raspberrypi.stackexchange.com/a/19754/8697

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Milliways
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