I’m working on a vtol flying wing configuration aircraft…where i facing an issue..i am using matek sys digital airspeed sensor - ASPD - DLVR L431 in which the parameters i have set is arspd_type = 9(DLVR-10), arspd_use = 1 and the flight controller im using is speedybee f405 wing as well….so the issue im facing was when i connecting airspeed to fc in which from i2c port of airspd to digital arspd sensor port of fc..the baro abnormally behave..its altitude shows in software from -1000m to +2000m..but when i disconnect the airspeed, it becomes normal.. Please let me know how to resolve this issue?
Someone else may know off the top of their head. If so, disregard me.
I’m interested to dig in. Do you know how to record short logs demonstrating this problem? ( Downloading and Analyzing Data Logs in Mission Planner — Plane documentation )
Also, have you tried resetting all other parameters which can be to their default values? This helps to isolate that the root cause is the sensor/sensor-software. (Not some interaction with some other parameter that you didn’t realize impacted this.) Please do this before getting the following logs.
Here’s what I imagine recorded in the logs:
- Boot without the sensor connected and AP configured not to use it. This establishes “normal operation”. (I expect to see a reasonable altitude.) This log serves as our “control” against which to compare the 2nd.
- Boot with the sensor connected and AP configured to use it. (I expect to see the +/- 1500 altitude you describe.) That will demonstrate the problem for me to inspect.
- Optional: undo the AP configuration and disconnect the sensor. Show that altitude behavior is identical to log 1. (You also could just tell me that you did it, and observed that. I don’t really need a log to show it.)
Finally, please specify what you mean by “its altitude shows in software”. OFC I have a guess, but should be easy for you to clarify.
Actually I have tried the parameters which were available on the Ardupilot Website for my particular Airspeed sensor….. However I’ll cross check again everything and I’ll share the logs in a little while
it means in the mission planner screen the altitude is fluctuating between the values from 300 to 1000m sometimes in negative and in positive
You did follow the wiring diagram and also removed the two resistors to switch the airpseed module to i2c mode ?
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Hi I have made the logs with and without sensor as you suggested, I did this on bench only powering via USB and I am not connecting battery for now. And you can see the fluctuations in the barometer altitude in logs.
No I didn’t do this because it was not mentioned over ardupilot i guess
Sounds like you’ve found an important fact.
Let me know if that does not work to fix your issue, and I’ll take a look at the logs.