# Help with drone familiarization

Source: https://forum.modalai.com/topic/4883/help-with-drone-familiarization
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: fpv
Posted: 2025-11-21 14:40:35 UTC by taiwohazeez
Replies: 4 · Views: 2830

## taiwohazeez · 2025-11-21 14:40:35 UTC

Hi support, 

I am a PhD student, and I am very new to robotics. We have 4 starling 2 drones in the lab, and right now, I have two of those drones being prepared for RMA. The drones keeps getting damaged because I don't have the right knowledge about drones. I looked up the technical documentations online, but there are still so many things I don't know. For instance, one of my drone crashed when i toggled the switch to hold mode (and it hasn't done that ever since I got it),it shot straight up very fast. I keep getting height estimate not stable (I don't even know what to do to fix that error). Also, the last working drone also drifts around when you toggle the controller to hold (the middle position). At this point, I cant even fly the drones because I might crash them again. And eventually I will get in trouble with these. Can you help with documentations that will make a beginner get all the necessary knowledge. Right now, I am just working on the drone blindly. I will be grateful if you can help with the situation. 

Thanks,
Taiwo

## Reply by Moderator (ModalAI staff) · 2026-01-03 19:51:17 UTC

@taiwohazeez You should start here: https://docs.modalai.com/voxl-developer-bootcamp/

## Reply by taiwohazeez · 2026-01-04 13:55:46 UTC (in reply to Moderator)

@Moderator Thank you for your response. I have gone through the documentation several times. Even with that, I can't tell why I get those preflight check fails. Sometimes it clears, most times, I keep getting several warnings. I will go over the documentation again, maybe I am missing something. 

For instance, why do I have a cpu usage when the voxl-modem isnt running? or is that normal
? ![Screenshot from 2026-01-04 08-23-16.png](https://forum.modalai.com/assets/uploads/files/1767534893015-screenshot-from-2026-01-04-08-23-16.png) 

Regards,
Taiwo

## Reply by tom (ModalAI staff) · 2026-01-05 18:05:00 UTC (in reply to taiwohazeez)

@taiwohazeez What SDK version are you running? Can you post the output of `voxl-version`?

It seems as though some missing CPU stats are causing the values to by shifted by one, the 98.2% is likely from voxl-open-vins-server

## Reply by taiwohazeez · 2026-01-05 20:54:54 UTC (in reply to tom)

@tom This is the output

voxl2:/$ voxl-version
────────────────────────────────────────────────────────────────────────────────
system-image: 1.8.06-M0054-14.1a-perf
kernel:       #1 SMP PREEMPT Wed Oct 22 04:13:18 UTC 2025 4.19.125
────────────────────────────────────────────────────────────────────────────────
hw platform:  M0054
mach.var:     1.0.1
SKU:          MRB-D0014-4-V1-C27-T9-M0-X0
────────────────────────────────────────────────────────────────────────────────
voxl-suite:   1.6.2
────────────────────────────────────────────────────────────────────────────────
Packages:
Repo:  http://voxl-packages.modalai.com/ ./dists/qrb5165/sdk-1.6/binary-arm64/
Last Updated: 2025-12-25 03:58:02
List:
libfc-sensor                   1.0.8
libmodal-cv                    0.6.0
libmodal-exposure              0.1.4
libmodal-flow                  1.0.3
libmodal-journal               0.2.7
libmodal-json                  0.4.8
libmodal-pipe                  2.14.8
libqrb5165-io                  0.5.0
libvoxl-cci-direct             0.3.3
libvoxl-codec                  0.0.1
libvoxl-cutils                 0.1.6
modalai-slpi                   1.2.2
mv-voxl                        0.1-r0
qrb5165-bind                   0.1-r0
qrb5165-dfs-server             0.2.0
qrb5165-imu-server             1.2.3
qrb5165-mini-tof-server        0.2.2
qrb5165-rangefinder-server     0.1.6
qrb5165-slpi-test-sig          01-r0
qrb5165-system-tweaks          0.3.11
qrb5165-tflite                 2.17.2
voxl-bind-spektrum             0.1.1
voxl-camera-calibration        0.6.1
voxl-camera-server             2.2.17
voxl-ceres-solver              2:2.0.0-2
voxl-configurator              1.0.10
voxl-cpu-monitor               0.7.4
voxl-docker-support            1.3.1
voxl-elrs                      0.4.14
voxl-esc                       1.5.7
voxl-feature-tracker           0.5.2
voxl-flow-server               0.3.6
voxl-gphoto2-server            0.0.10
voxl-io-server                 0.0.6
voxl-jpeg-turbo                2.1.3-7
voxl-lepton-server             1.3.3
voxl-lepton-tracker            0.0.4
voxl-libgeographic             1.0.0
voxl-libgphoto2                0.0.4
voxl-libuvc                    1.0.7
voxl-logger                    0.6.0
voxl-mavcam-manager            0.6.0
voxl-mavlink                   0.1.6
voxl-mavlink-server            1.4.12
voxl-microdds-agent            3.0.0-0
voxl-modem                     1.2.2
voxl-mongoose                  7.19.0
voxl-mpa-to-ros                0.3.9
voxl-mpa-to-ros2               0.0.7
voxl-mpa-tools                 1.5.5
voxl-open-vins-server          0.5.7
voxl-opencv                    4.5.5-3
voxl-osd                       0.2.1
voxl-portal                    0.8.4
voxl-px4                       1.14.0-2.0.124
voxl-px4-params                0.8.11
voxl-qvio-server               1.2.2
voxl-remote-id                 0.0.9
voxl-reset-slpi                0.0.1
voxl-ros2-foxy                 0.0.1
voxl-state-estimator           0.0.5
voxl-streamer                  0.8.0
voxl-suite                     1.6.2
voxl-tag-detector              0.0.5
voxl-tflite-server             0.5.0
voxl-utils                     1.4.9
voxl-uvc-server                0.1.7
voxl-vision-hub                1.9.19
voxl-vtx                       1.7.6
voxl-wavemux                   0.0.3
voxl2-io                       0.0.3
voxl2-security-hardening-utls  1.0-r0
voxl2-system-image             1.8.06-r0
voxl2-wlan                     1.0-r0
────────────────────────────────────────────────────────────────────────────────
voxl2:/$