I triyed to add sensors on my 450 heli which was flying pretty good before.
I own a pixhawk 2.4.8 (FW detect a PX4 FMUV2) on it.
I loaded copter 3.2.1 to fly.
The sensors are 3 GYUS42 for proximity and 1 VL53L1X laser sensor for low altitude.
All the 4 are I2C protocol connected, tested on aduino and address checked.
Impossible to have it work… Prearm alert say rangefinder1 (alt) is not detect and 3 other proximity need to be check.
I don’t know what is the problem.