Using my Twine to tell me when to water a plant
This is a multipart question...
A.) If I stick the moisture sensor into the moist dirt in a potted plant, it reads "wet." I'm just curious how dry it will need to be for it to read "dry." This sensor seems very sensitive. Just holding it in my hand reads "wet." I'm guessing anything that conducts electricity is going to cause it to read "wet," right? So will dry dirt still read "wet" because it probably still conducts electricity a tiny bit? Or is that not how it works?
B.) Will leaving the sensor tip in damp soil for an extended period of time (days, months, decades) be bad for it? Do I need to worry about it corroding or anything like that?
Thanks in advance for any advice!
And thanks to Supermechanical guys for making this awesome gizmo.