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1answer
379 views

Are my GPIO ports not working?

On my Raspberry Pi, I tried to do some experiments with GPIO, without success. Measuring the voltage between GND and GPIO11, for example, always helds a result of 0. I am using /sys/class/gpio ...
6
votes
2answers
2k views

How do I measure the current power consumption?

Is it possible to measure (with software, like powertop) the current power consumption on my Raspberry Pi?
5
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3answers
1k views

How to detect whether there is voltage between two points via GPIO?

I'd like to detect whether an external device is switched on or off. I found two pins where there should be 5V between in the first case, but the voltage may vary a bit and I don't wont to break the ...