Søren Kuula
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Søren Kuula's Discussions

APM2.6 crashing

Started this discussion. Last reply by Søren Kuula Feb 16. 3 Replies

Hi,I have bought 2x APM2.6, 2x PM and 2x GPS with compass from DIYDrones store.Tried to initially set up one set today. I have attached a PPM receiver on Ch5, cutting and resoldering the PPM jumper…Continue

Where's the APM1.4 bootloader?

Started Aug 27, 2013 0 Replies

Hi,I think I have busted my APM1's bootloader.I wonder where I can find a new one to ISP prog. There is an APM2 bootloder in the Tools dir in the Ardupilot repository. That probably reports the wrong…Continue

What's going on ... no ailerons except in MANUAL

Started this discussion. Last reply by Søren Kuula Aug 27, 2013. 2 Replies

Hi, I have ArduPlane 2.47b on an APM1 (all I have left, haha) in a glider.Radio is calibrated. IMU is okay.Problem: Ailerons are centered in all modes except MANUAL, no matter what I do with the…Continue

PX4 discards parameters after power-off?

Started this discussion. Last reply by Søren Kuula Aug 23, 2013. 1 Reply

Hi,What is that with my PX4? I have ArduPlane 2.74 on it, I connect to it in MP and set things, all OK. Then write setting, disconnect, cycle power just to test, and all parameters are back at…Continue


Søren Kuula's Page

Latest Activity

Søren Kuula replied to Lucas Vickers's discussion Adapt existing autopilot platforms for an indoor blimp, or start from scratch?
"By the first impression of it I would scratchbuild the code. Reason: Control of the blimb is different from anything else, there isn't much to reuse. Maybe use the APM 2.x board, it is light. Or the gumstix, even lighter and more…"
7 hours ago
Søren Kuula replied to Michael Mancini's discussion What is needed to make this launch ready?
"Flight controller RC system Flight batteries Spare props Battery charger (and fly low and conservative to begin with :) When you can fly it nose-in in circles around yourself, you can try more things. )"
7 hours ago
Søren Kuula replied to Tim Painter's discussion problems with cheap Chinese neo-6 ublox + compass v2.0
"Ah i missed the point that the battery was the onboard one and not the flight battery. If that it placed so near the chip that its charge current affects it, obviously its a poor design. I guess some ppl still buy it becahse it's cheap. And if…"
7 hours ago
Søren Kuula replied to Tim Painter's discussion problems with cheap Chinese neo-6 ublox + compass v2.0
"Hi, any compass should and will react to a magnetic field. And there is no way for a compass to distinguish the earth mag field from your DC current one. So if the Chinese compass board uses the same IC as a 3DR one and if it doesnt have a mag field…"
10 hours ago
Søren Kuula replied to Simon Howroyd's discussion Reversing deflections
"Normally the configured reversal is of the flight control output. The manual control mixed in should be unaffected (reversal of that is set up on the rc tx). The exception is elevons, in the mode where APM does all mixing. It's almost so…"
10 hours ago
Søren Kuula replied to shelby meinkey's discussion Diagnosing possible ESC failure with motor logs.
"Hi, how about securing it to something heavy and do a couple of static "flights"?"
Søren Kuula replied to Tom Mahood's discussion 3DR Power Module not very accurate - What should I expect?
"Randy, Randy, why would Vcc sag under loading of the battery? Vcc is after the voltage regulator in the power module or the BEC, whichever the user chose. If BEC is used for APM power and there is lots of servo activity, thats a different story (BTW…"
Søren Kuula replied to Mark Van Haze's discussion Kerosene jet with Arduplane crash analysis
"Hi, is there any chance the APM might have come loose, simply? RSSI indicators are not really reliable. They are more for diagnosis/entertainment; many will indicate "full signal" given a loud burst of noise.  You may want to…"
Apr 14
Raúl Edo replied to Søren Kuula's discussion Does ArduCopter work well with negative above-start-location altitudes?
"Oops! So sorry. Thanks for your answer! "
Apr 10
Søren Kuula replied to Søren Kuula's discussion Does ArduCopter work well with negative above-start-location altitudes?
"Aaaaah .. no. It crashed again before I got so far :("
Apr 10
Raúl Edo replied to Søren Kuula's discussion Does ArduCopter work well with negative above-start-location altitudes?
"Hi Soren, Did you ever managed to do that?? Thanks."
Apr 10
Søren Kuula replied to jvmolo's discussion Quad attack in the group ArduCopter User Group
"Why blips? I believe it is possible to initialize AVR timer OCs without glitches?"
Apr 9
Søren Kuula replied to Bill B's discussion Extreme servo travel on APM 2.5 boot
"Hi, Okay I think we have pretty much gotten to the bottom of it. The Tx should be on at bootup and things should be okay. I had some servo torture too the other day, I really have to check once more that I did remember the Tx. Else I need examine…"
Apr 6
Søren Kuula commented on PX4's blog post Pixhawk Details #2: Multicolor led and connector demo
"Oi oi ... flashing LEDs are very hard to comprehend (except for those who implemented them, they typically can't see any problem), especially in a stressful situation. A small LCD or matrix LED display would not be all that bad to have. Even if…"
Apr 6
Søren Kuula replied to Mihai's discussion LOITER and RTL crashing bug
"If your motors stop completely at 12 hundred and something, could that be the cause? That is a quite high throttle setting (each motor output throttle I mean) for just cutting. Regards, Soren"
Apr 6
Søren Kuula replied to Trevor Strand's discussion APM 2.5 Channel 1 servo twitching in LOITER
"Hi, It's probably just the random noise in the GPS position and the plane being very near its home pos. that makes it sometimes want to turn right and sometimes left to get there. But yeah, if a plane is like less than 10 meters from home it…"
Apr 5

Profile Information

About Me:
M. Sc. computer science
3 year MikroKopter pilot
Please tell us a bit about your UAV interest
Multicopters for fun (aerobatics). Winged drones for photo (still in contruction).

Søren Kuula's Blog

Externally accessible pins APM1 and APM2

Posted on August 26, 2013 at 6:00pm 2 Comments

If somebody else had ideas about using old APM1's and soon to become old APM2's for some different purpose than autopiloting - probably you will want to connect some hardware, right?

I have gone through what I could find of documentation, and measured what was not documented.

Here is a brief…


Sticky Home Experiment

Posted on August 20, 2013 at 1:03pm 11 Comments

I wrote a feature for ArduPlane that allows the home position to be somewhere else than where the APM was started. This is useful for flight under "flying line" rules or if you want to ready your plane in one place and fly it from another.

The feature was requested and discussed …


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