I recently got the Eagle Tree airspeed sensor so that I can use the energy based altitude control loops with my plane. However, when I follow the instructions as per here: http://paparazzi.enac.fr/wiki/Module/Airspeed_ETS
the code build's fine, but once I upload it to the TWOG, there is no telemetry sent. I believe this is a different problem than the widely reported issue of the Eagle Tree Sensor only working when the autopilot is flashed, not when the autopilot was booted up normally.
I've double-checked the wiring, and the sensor works fine on it's own - I can see the max speed on the LCD display. Nothing appears on a scope when looking at the SCL or SDA lines - this would make sense if the TWOG isn't doing anything right?
Here's the airframe file I'm using (pared back to just measuring the airspeed, no energy control). This is all in v4.2, although I've also tried in v4.0 without success:
I also determined that the issue doesn't happen when only <define name="USE_I2C0"/> is added. It happens when the ets airspeed module is loaded: <load name="airspeed_ets.xml"/>.
Any ideas for further troubleshooting or help regarding this would be very appreciated.