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.