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Thanks Alan, will investigate and have a fiddle with it and see if it works. using the test code from above Pin c3 is outputting about 0.69V down to 0.66V at the collector (3V supply). Tried to jerry rig a pulldown resistor 4.7M Ohm (don't have 1M ohm at the mo) but no change. Setup is now on...

using solid core wire so only a small portion of the wire is exposed, the code requests an occasional reading, thus is not constantly on. It is for a plant container so does not need to be always on. This should extend the life of the probes. Keeping an eye on them to see how durable this setup...

I have a circuit up and working, basic "moister tester", Was wondering if I could drive a very small dc water pump using a BC377 NPN and Input pin C3? Holding C3 high with pullup. The purpose would be to water a small container when it needs. I am using a 08M2, obviously I could use a bigger...