Thanks @Robert.Wall - yes it was the interconnections diagram I was looking for.
I can stop now that I know it doesn’t exist!
There do seem to be two switches implemented in the emonPi. They are referred to in this post, with one of them being called ‘recessed’:
But alas, the GPIO diagram only refers to the one button (pin 16).
The backlight is also a mystery to me still.
If there is a software command/time-out to turn it on/off, then there must be a pin assigned to that function somewhere on the Pi-board itself.
This post references some changes being made to the code for the LCD backlight time-out
but alas there is no comment to state where is the pin that gets toggled.
I feeling a bit daunted broaching such a mundane hardware question here. The Forum seems to be well populated by coders - which I’m not.
