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Hugues's Groups

Hugues's Discussions

How to use SITL simulated vehicle to test a real antenna tracker ?

Started this discussion. Last reply by Jakub Oller May 16, 2016. 4 Replies

Hello,I would like to test a real antenna tracker, driven by a Pixhawk and the antenna tracker firmware,  which is setup "in the middle" : on one side the antenna tracker is linked via 3DR radio to the vehicle, on the other side, it is linked to a…Continue

What is the status of 3DR radios?

Started this discussion. Last reply by Art Feb 3, 2016. 5 Replies

A user reported on this forum a 3DR representative announcing 3DR is stopping the 433 and 915 radios. I assume this is incorrect information or is it? Can a 3DR official give the real status?If 3DR really stops the radios, what could be reliable…Continue

AirbotServices's light 45gr Mobius 2 axis gimbal+vibrations tests

Started this discussion. Last reply by iskess Jul 28, 2015. 4 Replies

Finally found a bit of time to test the light 45gr 2 axis brushless gimbal we built for the Mobius camera,PS for Cala : better late than never ;)Continue

Tags: lightest, gimbal, Brushless, camera, Mobius

How to configure CAM_TRIG_DIST to ouput a PWM signal from a Pixhawk output ?

Started this discussion. Last reply by Jim Kahmann Jun 13, 2016. 6 Replies

Hi,I would lile to use the Survey function in mission planner which uses the CAM_TRIG_DIST method to trigger a camera at regular distance intervals.I'm using an infrared camera trigger which is activated by a PWM signal (configurable).The question…Continue

Is Minimosd incompatible with Sony NEX5R ?

Started this discussion. Last reply by Hugues Jan 7, 2014. 17 Replies

Hello,I'm trying to use my Sony NEX5 camera as a FPV camera using this HDMI AV converter :…Continue

NEVER connect a Capacitor backup or voltage protector on APM board

Started this discussion. Last reply by Hugues Nov 19, 2013. 71 Replies

Hi,Edit : from the posts below I deduce the issue seems specific to my config. Threfore I remove temporarily my request to add a line a caution in the wiki as it might not be a general problem for everyone, until further investigation and…Continue

[PROBLEM] Mission planner updater error

Started this discussion. Last reply by dudz Apr 17, 2013. 5 Replies

Hi,I launched today the mission planner that started an auto update. It starts downloading files updates (as visible in the console window) but after 2 minutes it stops with error, giving this display and error message:…Continue

LEDs use on APM2.5 board

Started this discussion. Last reply by TJ Feb 2, 2013. 1 Reply

Hello,I have seen a picture in the Wiki for the 2.0 APM board showing ouputs A9 to A4 being named "Motor LEDs".Is there any explanation what that is and how is it used ?For example can those outputs be used to power 12Volts LED strips ? (or is it…Continue

Programming with Arducopter/Arduino

Started this discussion. Last reply by duster3 May 6, 2013. 15 Replies

Hello,I would like to compile and upload the Arducopter code to my UAV. To do so I followed the instructions on the wiki, that is :-installed the Arduino 1.0.3 (Arudpilot) version on win7-installed the 2.8.1 software version (the two folders…Continue

Tags: Arducopter, Arduino, Programming


Hugues's Page

◾ About Me:

◾I'm the founder of AirbotServices that provides UAV expertise and services for professionnals. We aim more particularly at serving the agriculture, real estate and industrial sectors.
Web site :


◾Engineer - Ecole Polytechnique of Brussels (ULB), specialization in Telecom & Electronics
◾MBA - Solvay Business School (ULB).

Please tell us a bit about your UAV interest:
◾I dove into the subject a few years ago when I was searching how to upgrade a very bad camera on my 8 years old son's remote controlled helicopter.
◾I found the diydrones community on the basis of which I built up this passion.
◾Contributing Blogger and Editor of DIYDrones APMcopter and APMplane wikis.
◾Currently developing AirbotServices products and services.

Latest Activity

Hugues commented on Ofer Eldad's blog post Flight Envelope Protection System with Pixhawk and Odroid
"thx Ofer for these explanations. Makes me realize how more there is to learn! do you have a 101 documentation on UKF I could start reading (engineer level) ?"

Hugues commented on Ofer Eldad's blog post Flight Envelope Protection System with Pixhawk and Odroid
"Hello Ofer, To understand the improvements that this intelligent system brings, in what way is it better or different than the current Ardupilot where EKF is laready used an,d where we can set a bunch of parameters to define maximum pitch/roll…"

Hugues commented on Olivier's blog post Autonomously fly to a location and deliver a package (Ardupilot Copter 3.5)
"Ah ok, so you mean we can have a servo winch type of delivery system ? So I understand, according to what Randy explained, that when the throttle level is reduced by the autopilot, that would mean the package has touched ground, and then a servo…"

Hugues commented on Olivier's blog post Autonomously fly to a location and deliver a package (Ardupilot Copter 3.5)
"Current Arducopter release has and had already all the required mission commands to do this. Did it in V3.2.1 more than a year ago to drop a package in a delivery mission:   what new command(s) will be introduced in…"

Hugues replied to Charles Linquist's discussion Telemetry and HD video over 4G
"interesting. What hardware (i assume a 4G dongle on a companion computer ?) and software is needed on the drone side ?"

Hugues commented on Chris Anderson's blog post Trebuchet drone launcher
"love this kind of out of the box thinking."

Hugues replied to Teoria's discussion Pixhawk and SBEC 5.6V output
"Teoria, if you go over 5.7V on the servo rail of Pixhawk, the latter will shutdown for protection, even if you use a power module. This is why as a precaution, you should connect in parallel a zener diode (5W recommended) with an avalanche trigger…"

Hugues commented on Stijn Debecker's blog post RTK GPS based landing: test results
"Ah I found it, septentrio device, of course (stupid question of me). Also Stijn, can we test your septentrio device on a fixed wing ? Please PM me if interested."

Hugues commented on Stijn Debecker's blog post RTK GPS based landing: test results
"Nice experiment. Can you share technically what is the RTK GPS you used and how it is linked to Pixhawk and configured ?"

Hugues commented on Hugues's blog post How-to guide: Pixhawk auto camera trigger (without CHDK)
"Kind of late answer Jim, but did you configure correctly your CH7_OPT param to 9 and then your shutter parameter in the gimbal configuration screen in mission planner to the right RC10 aux port ? Also be aware that for the trigger camera now to…"
André Zibaia da Conceição replied to Hugues's discussion Pixhawk external LED? in the group ArduCopter User Group
"Thanks Nick! I think the 2 mavpixels idea (duh for me!) will make it work perfectly :) Actually, I think I will use a 7bit ring alternative, which will be much simpler to wire. Thanks again and keep up the good work! "
Nick replied to Hugues's discussion Pixhawk external LED? in the group ArduCopter User Group
"Sorry, Ivars for the very late reply. I totally missed this one. So I just confirmed the firmware flasher feature (still) works for me. During the flash procedure does the progress bar at the bottom of the flasher show any progress? There could be…"
Nick replied to Hugues's discussion Pixhawk external LED? in the group ArduCopter User Group
"Hi André. Thanks for your kind words. There are no plans at the moment to support other boards. Mavpixel is a codewise clone of Cleanflight LED strip functionality with Mavlink control and has all the same features and limitations, notably 32…"
André Zibaia da Conceição replied to Hugues's discussion Pixhawk external LED? in the group ArduCopter User Group
"Hi Nick! Congrats on your work. I am building a quad and the Mavpixel-driven LEDs are a big part of it! Do you plan to support any other boards that allow a greater number of LEDs? I would like to put some of these under each motor of my…"

Hugues commented on Stanley Anak Suab's blog post Interesting bird style landing "the perching drone"
"Would love to see a perch landing mode integrated in Arduplane! Tridge , when ?"
Jan 13

Hugues commented on Gary Mortimer's blog post Who remembers Piksi, Colin and Fergus make Forbes 30 under 30
"Congrats to them !"
Jan 13

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Hugues's Blog

XUAV Clouds Overview and unboxing

Posted on December 29, 2016 at 12:48pm 0 Comments

Hello (again),

XUAV (HOOAH aviation technology LTD) latest EPO FPV/Survey model is the "Clouds". Here a quick overview and unboxing video, with some comparison with their Talon flagship model.

A tiny FPV quad review : QX90 with modded electronics for FrSky compatibility

Posted on December 29, 2016 at 3:54am 6 Comments


Here a shared review of a quite cute and tiny FPV quad, the QX90.

It was unfortunately delivered to me with a built in DSM type receiver so I could not use it with my Taranis radio.

I therefore modded the electronics with another tiny board that is incredible : it integrates a F3 flight controller with all bells…


190 size FPV racer build & review from GEP

Posted on September 24, 2016 at 10:52am 2 Comments


A 190 size FPV racer kit review from the GEP brand (so called ZX5 model). What's different about the previous FPV racers build I did before is a X frame while my former builds were always made with a classical H frame.

X frames have an advantage over H frames in that they are more symetrical (useful in FPV racing) and they twist…


Arudpilot Antenna tracker explanation and field test

Posted on September 9, 2016 at 3:11am 6 Comments


Made a short explanation video about Ardupilot's antenna tracker as many people are asking about what it is and how it works.

Current release 1.0 is still improving (thanks Randy !)



Comment Wall (11 comments)

At 10:26pm on March 19, 2013, Oliver said…

Hi, I just posted the parts list with some notes in the comments below my original post on the gimbal.



At 12:11am on March 20, 2013,


At 12:52pm on November 7, 2013,
Forrest Frantz

Didn't want to say this in the crowd.  But I think mass distribution has a bearing on the PIDs as does distance from the respective axis.

Example:  Say there is a rectangular cubic battery pointing fore and aft at CG on a symmetric quad copter.  Say the rotors are 20 cm from their axis and the battery is 10cm x 2 cm.

o The torque factor exerted in pitch over the battery would be 20/(10/4) = 8 to 1

o The torque factor exerted in roll over the battery would be 20/(2/4) = 40 to 1

If you have two steel wheels of the same mass, the larger one will be more difficult to get rolling (there is a larger change in momentum).

So it is 5x easier to roll than pitch.  I think that should be accounted for in the PIDs?  But maybe I'm wrong.

Of course this is an extreme example where everything else weighs nothing, so the differences in ratios are never that high.  But it is common I think for the factors to be up to 1.5X.

Your thoughts?

At 1:42pm on November 8, 2013, Tyler McGahee said…

Yeah, the PIDs are definitely affected by the "mass distribution" (moment of inertia), as well as by the motors and propellers and ESCs and the control algorithm and on and on. I don't think it hurts to list the PIDs though. Could save some time when starting from scratch on a similar or identical rig.

At 10:37pm on November 21, 2013, HobbyColombia said…


A curiosity ... as I turn apm 2.5 and esc with 2 separate batteries.

Battery 1: APM 2.5 and FPV
Battery 2 Engines - BECS (servos)


Thank you!

At 7:28pm on March 11, 2014, HobbyColombia said…

Ardupilot on PX4 + IO won't arm motors.

Hi I have the same problem Mystery 30A ESC's ...

You Might explain "load up the firmware ArduCopter" Bootload firmware?

System works without problem, arm and disarm perfectly.

Safety Switch OK.

Calibration OK, ENGINES TURN.

Connect and disconnect battery and ESC sounds uncalibrated, not save settings.

/ / / / / / / Can not save the ESC Mystery Calibration and PX4FMUIO / / / /

At 1:11pm on March 12, 2014, HobbyColombia said…


/ / / / / / / Can not save the ESC Calibration in PX4 FMU IO / / / /

You know it could be?

Another question.

You know how I connect to OSD Remzibi px4 as if telemetry data and to see video on my monitor?

We appreciate evidence.

Thanks for you time.

You are responsible to give answers of diydrones community? curiosity!


At 8:11am on August 26, 2014,
Forrest Frantz
At 1:45pm on December 15, 2014,
Forrest Frantz

4 motor mounts and 4 tube plugs, cut, lightly sanded, ready to ship, and after you clean, ready to adhere.

Where do you want me to send them?

At 9:25am on August 18, 2015, Rafael Fontela said…

Saw an old post from 2013 title Tiger motors-propellers combinations for an heavy lift octocopter, where after testing several motors props combinations you chose the Tiger 3510 360Kv.

I'm trying to upgrade my 3dr x8+ to be able to extent the flying time while increasing the payload to be able to use about 1200 extra grams for camera equipment etc.  At present my drone is equipped with the motors and props that come from 3DR ( SUNNYSKY V2216-16 KV800) and by them the drone will be able to lift 800 grm while having a fly time of 15 mnts (by what I have read more like 10).

I was wandering if you think that using the Tigers and the props combination I could achieve the results you had, also whether

I could run the 6s batteries.

Thanks so much for your time


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