Manual

Next step is to connect to the autopilot. Choose the port through which Pixhawk is
connected to the PC; Then set speed in the adjacent tab = 115200 and press button
"CONNECT". After that, download the loading parameters from the autopilot.
After reading the parameters, go to the "CONFIG / TUNNING" menu and select the
"Full Parameter Tree" item. Find the "AHRS" parameter group to expand the branch
and set the value in the "AHRS_EKF_TYPE" parameter to 3. Then save the
parameters by pressing the "Write Params" button, as shown in the figure below:
Reboot the autopilot for updating the changes. To do this, go to the FLIGHT DATA
tab, select the "Actions" panel in the "PREFLIGHT_REBOOT_SHUTDOWN" pop-
up list and click "Run".