I don’t yet have an Energy Monitor - The emonPi Shield has arrived and other component parts will be here shortly.
I’ve found posts which mention the Hardware Diagram, but I cannot find the diagram myself. The best I’ve seen is this diagram on the Wiki
followed by a connection diagram for the GPIO
I’m looking to install an LCD screen, back-light and button(s) as per the usual emonPi in order to see system messages at start-up etc. All other use will be from a remote login.
I understand that the EA Dog 128x64 LCD screen connects to the I2C pins on the GPIO.
The button connects to GPIO-23 (pin 16) I think. But I guess requires a pull-down resistor?
However this other diagram has two buttons connected differently
Is that because he’s modified the code?
And finally, there’s the screen backlight. I’m happy to simply built a constant-current driver to light it.
But is there a “standard” way in which it should be connected such that the backlight can be turned on/off or dimmed under software command?