Thanks for your answer.
I double check my wires, and found that my capacitor 4.7uF wasn't in the right place. I modified it, delete my sensor on Vera and Include it again and It works.
thanks.
I have the same setup, and it works okay, voltage sits around 3.2ish volts in operation when powered via USB. If your power supply is adequate, perhaps it's just a bad Nano?
