A wise decision, at this point.
ibwev, you're sort of wandering all over the place with this thread.
Your initial schematic indicated that you were looking for a circuit that would respond to the presence of "moisture" and "turn ON" (i.e., supply power to) your ProMicro AND a 433 MHz RF Transmitter assembly.
Your description of how that circuit was working confirmed that conclusion. Only now, you appear to want to change that design such that the moisture probe is simply going to be attached to an an ADC input of an
already powered up ProMicro (AND the transmitter as well, apparently) and then trigger, by way of software, some event.
Two entirely different circuit requirements. Which is correct?
It would be very useful to know just exactly
what is the composition (as best as you can describe it) of the, 1. "moisture" you speak of, and 2. your "moisture" probe?
This would give us, at the least, some idea of what electrical characteristics we could expect when proposing any circuit ideas.