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hello, great instructableI built the sensor exactly like yours, both steel and aluminum. The only difference is that non-use shielded cables.I run the test in a water bottle.My problem is that if I apply a resistance 1mhom, the instruction capacitivesensorraw () always returns -2Only if I apply a very low resistance between the two pins or even directly connect the two pins without resistance values I get very, very low: if the sensor is filled with water I get about 50, but as soon as the water level is 3/4 I get the l value 0.I happen to know why?Sorry for my English and thanks
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