@curtis-hendrix I have no spec but I once tried to connect a small LCD display to that power pin. That was an instructive failiure. Even 400 mA is optimistic (may only be reachable at the limit of 5.5 V Gpy supply).
You can safely use that 3.3 V pin to supply some I²C chips but nothing that needs power.
I can't speak to the specifics of your case--I'm using a bare GPy sitting on a custom board--but I've also been looking into deep sleep current consumption.
I started a thread on the GPy board, where you can see my tests and results, but the short version is that with all the networks/peripherals down and doing a machine.deepsleep() the best I've gotten is also around the 0.5mA mark.
This is a total guess, but it looks very similar to doing a deepsleep() rather than actually "pulling the plug" as that shield seems to allow for.
@tanmay07 Got it thanks a ton!
I was also looking for another scenario where I do not have to use this. Suppose I configure my device to be on a deepsleep it consumes about 25uA current. But I want it to wake up on certain levels of voltage from my sensors on analog pins. Is it possible to do this using:-
machine.pin_deepsleep_wakeup(pins, mode, enable_pull)
?? Because I believe this function can only wakeup the decice from deep sleep if the specidied pins goes high or low.This can be used for specific voltage levels on analog pins right?