PMW3901 enable

PX4 Autopilot
1

Hi all,
I have a UART version PMW3901 and parameter SENS_TFLOW_CFG does not exist in vehicle setup parameters.What could be the issue?

Thanks!

2

What is your flight controller hardware? Maybe the driver for PMW3901 is not build for the board target you’re using, in which case you’d need to build it yourself.

3

Pixhawk 6X (ICM-45686)

4

Should be in the v6x: PX4-Autopilot/boards/px4/fmu-v6x/default.px4board at e194a52907083783f7e67ff93504016ca1275ce8 · PX4/PX4-Autopilot · GitHub. Which PX4 version do you use?

5

1.15 (stable) and I have connected it to serial TELEM3 PORT

6

What do you get when you type thoneflow in the shell?
You can try to start it manually with thoneflow start

7

thoneflow does not exists , but supplier told me there is a bug in newer PX4 firmware for Pixhawk 6X series flight controllers

8

Ah yes, it’s not enabled on the v6x. You’d need to manually do it. For that add
DRIVERS_OPTICAL_FLOW_THONEFLOW=y
in

Then you can rebuild and flash it.

9

Because I’m having trouble rebuilding this, I’d like you to give me instructions for it if possible, on a window pc or RPI5
Thank you very much

10

Here you find the documentation for building PX4 code, and if you need further help I recommend you to ask on our discord or in our weekly Q&A call