Andrew Tridgell
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  • Canberra, ACT
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Andrew Tridgell's Discussions

APM:Plane 2.76 released

Started this discussion. Last reply by Glen Wimberley Feb 5, 2014. 30 Replies

I've just released APM:Plane 2.76 with an important bug fix.Please see the release announcement for details.Continue

APM:Plane 2.75 released

Started this discussion. Last reply by Andrew Tridgell Nov 12, 2013. 29 Replies

APM:Please 2.75 has now been released.Have a look at the release notes in the forum for lots of details on the…Continue

APM:Plane 2.74 released

Started this discussion. Last reply by Gavin Greenwood Feb 23. 818 Replies

The APM dev team is delighted to announce the release of APM:Plane 2.74, a major new release with a lot of new…Continue

ArduPlane 2.74beta3 released

Started this discussion. Last reply by Andrew Tridgell Jul 15, 2013. 18 Replies

I've just released ArduPlane 2.74beta3. I'm hoping this will be the last beta before the 2.74 release. Please test it as much as you can!The simplest way to try it is to use a pre-built firmware from…Continue


Andrew Tridgell's Page

Latest Activity

Andrew Tridgell commented on Dan Wilson's blog post Autonomous Airborne Docking for Refueling or Recharging
"really great work!"
9 hours ago

Andrew Tridgell commented on Chris Anderson's blog post A glimpse of the scene at the 3DR booth at NAB
"@Justice, I've been flying a Pixhawk2 in my fixed wing sports plane for a while. Support for it has been in the main ardupilot git tree for quite a while, it just wasn't labelled as "Pixhawk2" as it wasn't announced. It is…"

Andrew Tridgell commented on Tobias Simon's blog post PenguCopter team wins RobotChallenge Airrace in Vienna
"great work Tobias! It's amazing how far you've come with PenguPilot in such a short time! "

Andrew Tridgell commented on Jerry Giant's blog post Raspiolt : yet Another Rpi cape flight controller WIP, designed in China
"Nice to see another Linux solution! are you talking to the STM32 using a UART (like Pixhawk)? If so, how many UARTs will end up being available for peripherals?"
Apr 1

Andrew Tridgell commented on Emlid's blog post First flight of Linux APM on Raspberry Pi 2 with Navio+
"fantastic, really well done!"
Mar 28
palo sestak commented on Andrew Tridgell's blog post APM:Plane 3.2.3 and 3.3.0beta1 released
"First - I know the APM 1.x is no longer supported for a long time however I have one installed in my plane. Does anybody tested release Arduplane 3.2.3 on APM board v1.4 ? I can compile it for the board (still enough memory) but don't know if…"
Mar 25

Andrew Tridgell commented on Mirko Denecke's blog post BBBMINI a Linux autopilot based on ArduPilot and BeagleBone Black
"Great work Mirko! I told people about your BBBMINI port at the Embedded Linux Conference today, so I hope you'll get a few new users from that. I think it is a really great way to get started on the Linux ArduPilot port. Cheers, Tridge "
Mar 24
Mike Mac commented on Andrew Tridgell's blog post APM:Plane 3.2.3 and 3.3.0beta1 released
"Yaw Autotune How far down the list is Yaw autotune. You commented a year ago that it was on the list and would probably be in the next release.   .    "
Mar 24

Andrew Tridgell commented on Michael - Swift Radioplanes's blog post SwiftTag - Free photo tagging software
"Hi Michael, I just noticed the deep stall landing feature on your site. Do you have the code changes for that in a repo somewhere? I'd like to have a look to see if it something we could include in future releases. Do you have any videos of a…"
Mar 18

Andrew Tridgell commented on Michael - Swift Radioplanes's blog post SwiftTag - Free photo tagging software
"very nice, thanks for releasing this!"
Mar 18
Christian Haake commented on Andrew Tridgell's blog post APM:Plane 3.2.3 and 3.3.0beta1 released
"Was there a 'real' problem with INS_PRODUCT_ID being reported as '0' or is it just displayed wrongly? I'm using ArduCopter 3.2.1 on 2 PX4 pcbs where one board is showing INS_PRODUCT_ID as '0' and…"
Mar 17
Heung-Jin Choi commented on Andrew Tridgell's blog post APM:Plane 3.2.3 and 3.3.0beta1 released
"Finally SBUS OUT is implemented. I was waiting for a while to help one of my club mates. I am going to set Pixhawk SBUS and redundant Rx SBUS (in case, bipassing Pixhawk) to X10+ channel expander which has dual Rx redundant capability. I know there…"
Mar 11

Andrew Tridgell replied to Graham Dyer's discussion APM:Plane, odd warning sound - no messages?
"Hi Graham, That sounds like your ESC complaining that it is receiving an out of range PWM value. When disarmed ardupilot will send RC3_MIN. Try adjusting RC3_MIN up a little and see if the beeping stops. Cheers, Tridge "
Mar 11
Luis Carlos Barrios Fedechen commented on Andrew Tridgell's blog post APM:Plane 3.2.2 released
"Hi..I have a issue with my few moments in auto modes the plane shake pitch (enter in oscillation)...turn back to manual mode shake dissapear, the problem not persist, only in few moments the oscillation appear.. Please any help...I post a…"
Mar 10

Andrew Tridgell commented on Chris Anderson's blog post Next Outback Challenge will have medical theme, be harder
"@Laser Developer, Interesting, thanks! Will the new high rate lidar give both distance and signal strength, or just distance? I'm wondering if we can infer anything about the material it is reflecting off from the data. Cheers, Tridge "
Mar 10

Andrew Tridgell commented on Chris Anderson's blog post Next Outback Challenge will have medical theme, be harder
"we won't know what the most difficult aspects of the challenge are till the rules are released. "
Mar 9

Profile Information

About Me:
Please tell us a bit about your UAV interest
Lead developer for APM:Plane and APM:Rover
Note: the best way to get in touch with me quickly is via the ArduPilot gitter chat here:
Canberra, Australia

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APM:Plane 3.2.3 and 3.3.0beta1 released

Posted on February 22, 2015 at 9:47pm 23 Comments

The ArduPilot development team has a special treat for fixed wing users today - a double release!

  • A new stable 3.2.3 release with 3 fixes for 3.2.2
  • A new 3.3.0beta1 release with a lot more changes for wider testing

The 3.2.3 release is a minor update to 3.2.2 with 3…


APM:Plane 3.2.2 released

Posted on February 9, 2015 at 4:00pm 12 Comments

The Ardupilot development team has released version 3.2.2 of APM:Plane. This is a bugfix release for some important bugs found by users of the 3.2.1 release.

The changes in this release are:

  • fixed a bug that could cause short term loss of RC control with some receiver systems and configurations
  • allowed for shorter sync pulse widths for PPM-SUM…

APM:Plane 3.2.1 released

Posted on February 5, 2015 at 3:25am 46 Comments

The ardupilot development team is proud to announce the release of version 3.2.1 of APM:Plane. This is primarily intended as a bugfix release, but does have some new features.

The major changes in this release are:

  • fixed a mission handling bug that could cause a crash if jump commands form…

Embedded Linux Conference - submit a paper!

Posted on January 5, 2015 at 5:38pm 0 Comments

There are only a few days left to submit a paper for the Embedded Linux Conference in San Jose in March. This is the first conference with a Drone specific track organised under…


Comment Wall (13 comments)

At 7:20pm on November 27, 2012,

Hi Andrew

It looks like my navigation gremlin isn't completely solved. I've posted an update with images and logs at

I wonder if you're able to see anything else obviously wrong?



At 8:12pm on December 19, 2012, Jamie Glover said…

Tridge, can I bother you to look over 5 log files to see if you can spot the crash and possibly what happened? I was flying my Skywalker with the exact same setup as always and have had many successful flights until yesterday. Two back to back and a totaled plane now. In FBWA it would go into a steady downward pitch. It was unresponsive to any of my input. I tried manual and RTL with no response. I had I think 5 logs on the APM after the flight and Ive looked through them, but Im not sure what Im looking at. The plane on the last crash stayed dangling in a tree for about 4 hours while I tried to get it down. Anyways, I would greatly appreciate your input. Email me if you wouldnt mind taking a look at the logs.

Thank you sir.


At 12:51pm on March 16, 2013, Gary McCray said…

Hi Andrew, Ive just finished putting in a section on how to flash your PX4FMU board with the latest developer ArduCopter PX4 code from your firmware object repository.

It's pretty ugly and includes quite a bit of stuff for setting up  development environment as well.

And sadly at the end after flashing the new code to the PX4FMU it still won't establish a MavLink connection with Mission Planner although I am pretty sure the board is properly flashed.

I am giving you the link to my Wiki debacle here:

I would greatly appreciate any feedback you could give.

I actually produced this primarily to get feedback from you as I did not want to waste any more of your time than necessary with incomplete back and forths.

If you can point me in the right direction(s) I would greatly appreciate it and will be happy to modify the Wiki page appropriately.

I figure that if we can get this simplest FMU only one to be "acceptable" the rest should fall into place fairly easily.

Thank You very much for your assistance with this.

Gary McCray (Please feel free to Email direct if you wish).

At 9:42am on April 22, 2013, Sid said…

Hi Andrew - 

I am new to ArduPlane development and having trouble getting it to build with Arduino.  

I would greatly appreciate any direction you can provide on what I am doing wrong.

This is what I have done:

I have downloaded Arduino 1.0.4, 1.0.3 and 1.5.2... I get the exact same set of errors whenever I tried to do a Verify / Compile of ArduPlane with any version of Arduino.  

There has to be something very basic here that I am missing.

I went here to get the latest Arduino development environment
There I downloaded Arduino 1.5.2
I extracted that to c:\Programming\Arduino
Then I was able to open Arduino and build their example programs without any errors.
I followed these instructions for getting set up for doing development:
No problems with building the Blink test example.
I set up the Arduino Sketchfolder here:  C:\Users\Sid\Documents\Arduino
I set this in Arduino's preferences
I then went to this page and followed the instructions for setting up ArduPlane development
I went here and downloaded the latest ArduPlane software - ArduPlane 2.7.1
I unzipped it to my desktop.
I then copied them to the Arduino Sketchbook folder as shown on Chris' web page (only using Sid instead of Chris).
Inline image 2
I then opened Arduino 1.5.2 and did a Verify / Compile and got the following error messages:
ArduPlane:239: error: new declaration 'uint8_t digitalRead(uint8_t)'
C:\Programming\arduino-1.5.2\hardware\arduino\avr\cores\arduino/Arduino.h:102: error: ambiguates old declaration 'int digitalRead(uint8_t)'
ArduPlane:1288: error: expected constructor, destructor, or type conversion before 'int'
ArduPlane.pde: In function 'int SKETCH_MAIN(int, char* const*)':
ArduPlane:1288: error: 'OK' was not declared in this scope
compat.pde: In function 'uint8_t digitalRead(uint8_t)':
compat:33: error: new declaration 'uint8_t digitalRead(uint8_t)'
C:\Programming\arduino-1.5.2\hardware\arduino\avr\cores\arduino/Arduino.h:102: error: ambiguates old declaration 'int digitalRead(uint8_t)'
I am at a loss as to what I am doing wrong here and I hate asking for help.  Any direction would be really appreciated.  I will be ecstatic when I am able to get ArduPlane to build and can start doing real development with it.
Thanks again.

At 5:39pm on April 22, 2013,
Andrew Tridgell

Hi Sid,

Have a look at under Tools, in the Arduino directory. That is the Arduino version you need.

Also see for more developer information.

Cheers, Tridge

At 8:07pm on May 24, 2013, Vishnu Rao said…
Hey Andrew! I'm flying an X8 with APM 2.5. I have quite struggled trying to tune the bird to the right PID settings. Lately I have been using the X5 Param file posted in the Common config website.
I noticed the X8 in your display picture, can you help me by sending me the parameter file you've been using?
My AUW is 4kgs. Any changes or suggestions to keep it safe and stable? I've taken care of the wings. Also when I was using the Arduplane 2.72, my plane would snake around while navigating. Is there anything I would've missed out?
Please help.
At 5:52pm on July 22, 2013, Philip said…
Hi Tridge
I sent you an email on your Samba email address with my contact details, will be up in Canberra tomorrow. Would be great to catch up if you are around.
At 10:28pm on September 15, 2013, MD said…

Hi Tridge,

Would it be feasible to code something to use the laser altimeter currently discussed on top content blog (link below). It's the first low cost and accurate one I've seen and could be used for both arducopter and arduplane, would be really good for autoland for both and avoidance, not to mention the what to do with it if put on a servo. Possible? If so, who would be best to ask to do this? Thanks.


At 11:28pm on November 21, 2013, Paul Classon said…

Dear Andrew, I recently got back into RC modelling after 50 years (64 now) there have been some significant advances in both radio and airframes since the old OS Pixie days and rubber escapements.  I bought a Bixler 1 now a 2 which I wanted to fit one of the Hobbyking Crius AIO FC's to. The Multiwii and megapirate AIO FC with a Atmega 2560 MCU.  Which firmware would you advise to upload, preferably something which will make the setup as much plug and play as possible. Are you aware of any periodic gatherings down here in Melbourne for like minded RC flyers?  I thank you in advance BR Paul.

At 12:11pm on December 21, 2013, Jamie Glover said…

Hey Tridge,

I went out earlier this week and flew a mission with the University's plane to test out the GeoSearch program. After completing the mission, I put it into FBWA to bring it down for a landing. about 75 ft off the ground, it went into an straight down nose dive. This is the second time its happened, but this one was unrecoverable. Needless to say the crash totaled the plane. I was wondering if you could look through the logs to see if it is possibly the same issue as the bug that was fixed in 2.76.  I was running 2.76 firmware. I looked through the logs and you can see where the APM received the command to pull out of the dive, but the servos never responded to the command.  Anyways, I was thinking it is either the bug or an interference problem from a cell phone tower about a mile away. My professor wants to make sure either way before we put more money into the project. Ive attached the log files and would greatly appreciate any feedback.



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