Updates

content/ardupilot/ardupilot-setup-checklist.md

@@ -57,7 +57,7 @@ The values in this section are specific to the Omnibus F4, but the settings aren
 - [ ] Set `COMPASS_ENABLE=0` if you don't have a compass, otherwise calibrate it (not detailed here).
 - [ ] Set `TERRAIN_ENABLE=0` to get rid of the terrain warning.
 - [ ] Set the FC's pitch relative to the body with `AHRS_TRIM_Y` and check that FBWA mode flies level.
-- [ ] If you don't use logging, set `LOG_BACKEND_TYPE=0`.
+- [ ] If you don't use logging, set `LOG_BACKEND_TYPE=0`. If you *do* use logging, set `LOG_DISARMED=1 LOG_FILE_DSRMROT=0` to prevent the EKF from diverging and causing problems on takeoff.
 - [ ] Check the preflight errors to warn on, though usually leaving it set to "all" is fine.
 - [ ] Set up the OSD (Mission Planner has a very nice UI for that). Keep in mind that ArduPilot's airspeed and windspeed estimation are quite good, so you may want to add those even if you don't have an airspeed sensor. You may also want to set up multiple screens, I use a potentiometer to switch between the four different screens of the OSD:
   -  One with everything on (for debugging), which is also set as the `OSD_ARM_SCR`/`OSD_DSARM_SCR`.
@@ -111,6 +111,6 @@ _(Many thanks to Michel Pastor and mfoos for their help with everything in this
 * * *
 
 <p style="font-size:80%; font-style: italic">
-Last updated on June 09, 2022. For any questions/feedback,
+Last updated on July 21, 2022. For any questions/feedback,
 email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
 </p>