OK... So I need only one resister... I think that "Scheme 2" is closer to the solution...

I based in the second diagram... i think that I understand it...

You are right! I thought that I missing something... always there are Data connection, VCC connection and GND.. and I had only one! I made another dummy scheme... Is that better?

Did you mean something like the figure above? Or I only need to connect one resistor to one wire and the other wire to another pin in the Arduino?

ok...Thank you... I will try the "voltage divider" and I will see what will happen!

Hey,
I am a newbie (in the forum) and in the arduino/sensors development. I bought the Leaf Wetness from cooking-hacks.com. Can I connected it to my Arduino via Analog input? Is it easy?