[Bug] FMUv6X with MS5525DSO Airspeed Sensor Not Working Correctly

[vincentpoont2]

Describe the bug

With the Pixhawk 6x + MS5525DSO Airspeed sensor, Master PX4 FW, the air speed went through calibration, but it did not require blowing into the tube. After going through calibration, the airspeed reading is incorrect & fluctuating.

No issue with Pixhawk 6C & Pixhawk 4

To Reproduce

Select VTOL airframe, enable SENS_EN_MS5525DS parameter, calibration airspeed sensor, look at airspeed value.

Expected behavior

The calibration should require blowing into tube, and sensor reading should be correct after calibration.

Screenshot / Media

6x_master.px4.mp4

Flight Log

N/A

Software Version

1.14.3 & Master

Flight controller

Pixhawk 6X

Vehicle type

Hybrid VTOL

How are the different components wired up (including port information)

No response

Additional context

No response

[julianoes]

Ok, I can reproduce the problem. It turns out the issue is that the 6X has a MS5611 baro on the "external" I2C 3 which uses the same I2C address, unfortunately.

ms5611 #0 on I2C bus 3 (external) address 0x76
ms5525dso #0 on I2C bus 3 (external) address 0x76

Need to think whether there is any way around this...