Hi,
I searched both with google and here in the forum but haven’t found a solution yet. Hopefully you can help?
My arduino is installed in a garden hut and shall activate a pump when water level in a tank that is approx 20m away reaches a certain level. I got hardware and software working fine in a test setup with short wires but when I connect the long cable (twin wires, copper ends hanging in the tank to short the circuit when both ends are in water) I assume there is too much resistance in the wires to make Arduino recognise when water shorts the circuit.
Any ideas how I can get this to work is very, very appreciated!
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