PX4Flow without Lidar possible any other suitable options?

@gbudde wrote:

Hey there,
thanks for this awesome community and thanks for those who Keep this runnig!

I am trying to get the PX4Flow Sensor to run on my quad but the result is not good yet. I think the problem is that I am not using a LIDAR for height measurment.
Here my Setup:
Pixhawk 2.1
ACopter 3.5.3 (now 3.5.4, did not a testfly yet)
PX4Flow without LIDAR

Unfortunatly there is no LOG-File of the last flight, let me try to explain what happend:
-I put the Quad in place and armed in loiter mode
-sometimes it started to accelerate and keep the position in 1m height.
-then it drift away a bit and i switched to stabelized and land
-back to loiter on the ground sometimes only one side accelerate so that the props touched the ground or the drone shoes some other unpleasent behavoir
--> So in conclusion it seems to me that the drone got some proplems to get a proper height measurement

After Research (https://discuss.ardupilot.org/t/px4flow-for-multiple-purposes/14327) and reading the instructions it is clear that a LIDAR get highly recommended but that is a few days ago, and so I am wondering is there any possibility to get this run without LIDAR or with cheaper additional hardware?

Thanks for taking your time!

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