Does the Pi (Pi3, in particular) have any ability to report
interal power supply voltages? Spot checks with a voltmeter
on the GPIO header are some help, but a running test that can
be logged over time would be much more informative.

I found a web page suggesting "vcgencmd measure_volts core"
but on my Pi3 it reports VCHI "initialization failed". Apropos
didn't hit on voltage or volt

As it happens I want to do this under FreeBSD, but if it can't
be done under Raspbian there's no hope. If it can, then I'll
look further.

Thanks for reading,

bob prohaska

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