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I want to use the "wake from halt" with my raspberry pi to keep it down must of the time and waking up using external stimuli when need. But I am not sure why, sometime it wakes up from halt although I haven't touched the gpio 6. It seems that other changes are waking up the pi. For example, I have a moisture sensor on gpio3 and if I put it in water (thus sending a 1 on gpio3) the pi wake up.

I have no idea what's wrong and any thought is welcome.

Simon C.
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It is almost impossible to halt a Pi running Raspbian with current firmware, so "wake from halt" is meaningless. See https://raspberrypi.stackexchange.com/a/66401/8697

You can boot by pulling pin 3 low, after a shutdown - using poweroff (or similar) - I know of nothing using GPIO6.

It is always possible that a power glitch is causing the Pi to reboot.

Why do you want to shut the Pi down anyway? What are you hoping to achieve?

Milliways
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