I’m currently using this simple soil moisture sensor (see attachment 1)
But since vases are really big, the value differs from top/bottom, center or edge.
For this reason I was thinking about having 1 or 2 additional sensors per vase and than calculate the average. Unfortunately this implies using several analog pins (I have already increased the number using two additional MCP3008).
I was thinking, would it be possible to do a connection like this (see attachment 2).
By “multiplying” the single sensor, doing one reading, the resulting value should be the highest of all the three…
Does this make any sense?
Any additional suggestions please?