Help with airspeed sensor

Lbarreiro · January 5, 2019, 5:42pm

Hi

I’m having trouble installing a airspeed sensor via I2C port on pixhawk cube with the last firmware.
I have one as show in ardupilot instructions for plane and followed all the steps without success.
I used for the ARSPD_PIN the value off 15 and 65, for the ARSPD_BUS the value 0, 1 and 3, and for the ARSP_TYPE chose all the sensor available.
I also check the connections, VCC, ground, SCL and SDA, it seems all okay.
Any ideas?
The mission planner don’t show any readings in all the combinations.

Thanks

flyingw · January 6, 2019, 4:06am

Had these settings working well, but with a Pixracer and ArduPlane 3.8.4.

Aticof · January 6, 2019, 7:53am

Maybe you can have the tubes inverted. To avoid it you can change:

ARSPD_TUBE_ORDER = 2

Lbarreiro · January 6, 2019, 9:31am

Thanks for the quick responses.

I have tried both without success, maybe a default sensor or I2C port malfunction?

Anyone with Piixhawk Cube?

Naterater · January 6, 2019, 4:57pm

What airspeed sensor are you using?

Lbarreiro · January 6, 2019, 5:07pm

Lbarreiro · January 8, 2019, 1:07pm

Anyone please

Aticof · January 9, 2019, 3:54pm

Check the pin on the I2C connector of the Cube.

ARSPD_TYPE = 1 >> 4525 airspeed
ARSPD_PIN = 65 >> Cube

Lbarreiro · January 10, 2019, 8:16am

Hi Aticof
Thank you very much!
It all works now, the strangest thing is that I have to reboot the Pixhawk for all start working.

egunak95 · February 13, 2019, 5:42pm

For example the speed sensor (i2c) is connected to the Holybro Pixhawk 4. Airspeed sensor 4525D is connected to Port B tested by H Pixhawk 4 ArduPlane V3 9 4 https://www.youtube.com/watch?v=0j0S4UuJcSk&t=22s . Digital airspeed sensor 4525D 5 with PCA9306 dual bidirectional I2C−bus voltage−level translator https://www.youtube.com/watch?v=05s3bGiqvVU&t=38s
ARSPD_AUTOCAL,0
ARSPD_BUS,2
ARSPD_FBW_MAX,22
ARSPD_FBW_MIN,9
ARSPD_OFFSET,23.7202
ARSPD_PIN,65
ARSPD_PRIMARY,0
ARSPD_PSI_RANGE,1
ARSPD_RATIO,1.9936
ARSPD_SKIP_CAL,0
ARSPD_TUBE_ORDER,2
ARSPD_TYPE,1

Daveemtb · March 6, 2020, 5:19pm

Glad you got it working. I’m having similar issues. Which value of ARSPD_BUS did you find worked for the Pixhawk Cube I2C 2 port in the end please? Thanks!

Daveemtb · April 8, 2020, 10:10pm

To answer my own question, in case anyone else is looking for the bus for the Cube, arspd_bus=0 worked for me in the end.

Scott_Nunan · April 12, 2020, 9:03am

Did you also have the gps/mag on the same i2c port, and did they both work simultaneously?

flyingw · April 12, 2020, 11:36am

Used an mRobotics integrated GPS/Mag and Pixracer. Plugged a cable from the GPS port on the Pixracer to the main port on the GPS/Mag, then ran a small i2c cable from the GPS/Mag’s i2c port to the airspeed sensor.