LW20 Distance Measurement

Hi

I have the LW20/C connected to Cube Orange + on the I2C2 connector.
Using official ArduCopter 4.5.7
I have it setup per:LightWare SF20 / LW20 — Copter documentation

It looks like the Ardupilot is detecting it and i am getting pre arm pass, but looking at mission planner status page both range finder and sonar range are always 0.

image

Any ideas what am i missing?

went as far as checking the I2C bus and looks like there is a replay from the sensor:

adding more information here

monitoring the serial for console prints at init I see that the code detect and init the LW20:

but still wherever I point it I get 0 reading.

Looks like a faulty unit, tried another one and it works like a charm.