I just updated my Quad from AC 3.6.10 Nuttx to Arducopter 4.0.
After the update I am getting now a Bad Optical Flow Health message and zero readings on
All parameters look ok, and the wiring of the PX4Flow is ok.
Optical Flow was working 100% fine with AC3.6 with 100% identical hardware setup prior to the upgrade.
Another strange observation is with my LidarLite Rangefinder connected through PWM. While I am getting reasonable readings for
rangefinder1, the Parameter
RNGFND1_OFFSET has zero effect on the readings. This was also working well with AC3.6.