• Male
  • Tokyo
  • Japan

Randy's Friends

  • Hameedullah Omari
  • Nisal Hemadasa
  • Joe Wayne
  • Akhmat Safrudin
  • william han lee
  • Kostas Karadimas
  • 許裕鴻
  • Brandon Walker
  • ThatJoshGuy
  • Enrique Aguirre
  • Dave Bonini
  • Team Tiltrotor
  • kyosuke motohashi
  • Robby
  • ChavAnd

Randy's Groups

Randy's Discussions

ArduCopter-3.2.1 Beta Testing

Started this discussion. Last reply by Marko Paggot 18 hours ago. 512 Replies

figuring out the Antenna Tracker

Started this discussion. Last reply by Christian Thalhammer on Thursday. 145 Replies


Welcome, Randy!

Latest Activity

Randy commented on Jerry Giant's blog post Raspiolt : yet Another Rpi cape flight controller WIP, designed in China
"@Jerry, Can't have enough Linux autopilots in my view.   Sounds great, especially the part about open-ness and re-using the work of others who have come before."
7 hours ago
hsgucci commented on Randy's group Japan ArduCopter Group
"[save]を押すと,82個ものリソースファイルができます(驚やはりMission Plannerの画面切り替えタブに従って,FLIGHT DATAから訳していきたいところです.おそらく"MissionPlanner.GCSViews.FlightData.ja-JP.resx"がそれだとは思いますが,,, どのファイルがどこの画面に対応するのか探すのも一苦労です.わかるファイルから順番に訳していくしかないのかな,と考えています.また平行して,Mission…"
14 hours ago
Hiro Okuda commented on Randy's group Japan ArduCopter Group
Hugues replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"You can't diagnose your vibe levels on such a large scale. You need to zoom in to be able to see Zacc excursions between +12g and -12g (not 200 like your graph scale is showing). Probably your flyaway has to do with way too high vibe levels,…"
Andy Piper replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"I recommend you go the make route. That works fine for me, albeit slowly. Better still install VirtualBox, Ubuntu and then build relatively rapidly :)"
Andy Piper replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"On my DX8, you can't. I understand on newer DX7's you can, but not older ones. The best way to do this ought to be using channel remapping in the APM firmware, but there is a bug with that as can be seen by the various ongoing discussions…"

Randy commented on Chris Anderson's blog post Photos from the Ferrara Drone Show
"Go team Italy! Yeah, really love the designs!  The Carbon Drone is particularly sleek."
Masafumi Miwa commented on Randy's group Japan ArduCopter Group
"日本語化、やりましょう。 こうゆう作業自体も楽しいですし、 ミスや事故も防げるでしょうし。"
Jiro Hattori commented on Randy's group Japan ArduCopter Group
"日本語化の方向性に賛成です。 具体的な手法は、理解していないのですが、どの言葉を使うのかに興味があります。 この上で、ディスカッションしましょう。 よろしく、お願いします。"
hsgucci commented on Randy's group Japan ArduCopter Group
hsgucci commented on Randy's group Japan ArduCopter Group
"情報ありがとうございます!!こんな隠しコマンドがあったんですね.ステップ通りにやってみたところ,確かにインストール先フォルダ下に リソースファイル(*.resx形式)ができていました.VisualStudioでも読み込みできました. ステップ7では,これを開発者にポストしてくれ」という話になっています.しかし,中途半端な翻訳で出すわけにはいきませんね~. 今後の方針として, 1. ディスカッションを立て,単純翻訳ではなく,良い訳語が何か意見をいただく.2. 開発者に投げなくても,野良ビルドできな…"
Cam Donaghey replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"Hello everyone, I was hoping someone might be able to help me out with a problem in compiling the code. I've followed the instructions outlined at the following link but in compiling 3.2.1 it is coming up with various…"
Jiro Hattori commented on Randy's group Japan ArduCopter Group
"少し調べました。 の方法で、トライしたらこんな画面になりましたが、読込めませんね。 指示通りにsaveして送れば日本語化できるのかな~? "
Pomaroli replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"The vibration level for me seems ok, but in stabilize or acro mode, flying high dynamic, the vib level is high that's true but what should i change ? on my opinion flying in Stabilize or Acro mode at high dynamic should be possible without…"
Cala replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"Notice your vibs level too, that affect your Baro, and your bad gps signal, if you lost Tx signal, your copter can't RTL and fly away "
Pomaroli replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"It's possible that the radio mount has loosened during the flight and caused the error by hitting pixhawk. I'm not sure but it might be possible. After the rebuild no error is noticable. The only thing i've changed is kalmanfilter…"

Profile Information

About Me:
Lead developer of ArduCopter. I coordinate releases, provide support for users having trouble with their copters, add new features (most often based on ideas and suggestions from the community). I also help others get their code integrated into ArduCopter.

You can find numerous video tutorials from me here:
Please tell us a bit about your UAV interest
Interested in quads and helis mostly. I got my start in this field by reading the electronics tutorials from Sparkfun and from watching the success of Jack Crossfire's vicacopter. I've learned an enormous amount from the combined wisdom of the people on the DIYDrones forums and members of the core dev team including Jason Short, Tridge, Doug Weibel, Leonard and many more.
Karuizawa, Japan

Randy's Photos

  • Add Photos
  • View All

Randy's Blog

ArduCopter 3.2.1 released

Posted on February 11, 2015 at 1:00am 75 Comments

Warning: there was a period of about 12 hours after this blog was first posted where an older version (AC3.1.2) replaced AC3.2.1 for APM2.  If you think you may have downloaded for the APM2 during these initial period, please check the version on your board by looking at the title bar of the Mission Planner (see…


Steps towards S&R in Japan

Posted on December 22, 2014 at 6:30pm 8 Comments

We seem to have a lot of natural disasters here in Japan (eruptions, mud slides, earthquakes) and like everywhere else we are counting on UAVs to…


ArduCopter 3.2 Released

Posted on November 24, 2014 at 8:56pm 230 Comments

ArduCopter 3.2 (aka APM:Copter) has been released as the default version replacing AC3.1.5. This is the exact same version that we invited all users to test two weeks ago.  Users who wish continue using AC3.1.5 can find it under the "Pick…


ArduCopter 3.2 ready for wider use

Posted on November 7, 2014 at 2:18am 226 Comments

After months of testing, ArduCopter 3.2 (aka APM:Copter) is ready for widespread use and we invite all users to give it a try.  In order to manage the support load at first it will be available only through the Mission Planner and APM Planner2's Beta Firmwares link.  This link is visible from the regular "Install Firmware" page if you check…


Red Balloon Finder

Posted on June 17, 2014 at 5:04am 38 Comments

As many probably know, this year's Sparkfun Autonomous Vehicle Competition (AVC) is similar to last year's except that a new challenge has…


Comment Wall (26 comments)

At 8:44am on January 5, 2011, Jack said…


I have been working on my own Quad with the NG code and have setup the Sonar and have it working very well . I have an indoor version with sonar and IR sensors and would like to know were the IR sensors are conected, what pins. I see you were working on implementing this so If you could help with basic setup I can try my hand at testing. Thanks for your work on the Sonar and good luck on the obstical avoidence.


At 5:47am on January 30, 2011, Kári Davíðsson said…

Thanks Randy. 

I do not have write access to the svn repository.

So I will send you the changed AP_ADC lib probably later today.

I am not sure if a circular buffer is needed. The beauty of a 1st order IIR filter is that we only need one "old" sample and if a second order is needed only two old samples. But I will look a little better into the filter selection before committing anything to you.

At 5:45am on August 24, 2011, Jiro Hattori said…

Hi Randy

 One of the way to introduce technology of arduino as IMU is that something like what you have done. Most of the Japanese model flyer love to fly traditional helicopter. 

 Another approach may be exhibit something very unique at MAKE fair at Tokyo Institute of Technology.  There will be many open source hardware and software freaks as well.

At 9:10pm on March 7, 2012, Ravi said…

hi randy, i had been following your forum for align450. i just got my APM2 purple. i loaded the ardu heli firmware. everythings looks to be ok on mission planner. but there is no PWM on servo out pins. i armed the APM2 and does gets armed. the radio callibration bars move proportionately. evrything seems to be OK. but in 'status' there is no PWM on channel out pins. it shows '0' PWM on all out channels. can uou please suggets what might be the reason. the APM2 works fine with arduplane and arduquad firmware. ravi

At 5:53am on March 16, 2012,


I had a different problem with my APM2 that I was able to solve by following the procedure found in the wiki with a search for APM board problems.  My board would not connect to the planner and it works now.

Good luck


At 2:18pm on May 15, 2012, wilson javier madrid sossa said…

hello hello hug.
I can help with anything, I did several plannings flight with tri and firmware 2.0.49 and flew very well.
I did a quad and install 2.5.4 program a waypoint flight and the team took off like crazy.WP PIDs are by default and does not really move as you do. can you give me some information.

I appreciate your help

At 4:41pm on May 16, 2012, wilson javier madrid sossa said…

Please can you help me. I was flying my quadcopter and hold position when you turn the team went to ground. these are the last two log. I appreciateprompt help.


At 3:54pm on September 29, 2012, Marooned said…

Hi Randy

After your changes to Optical Flow I'm having troubles with compiling the sources:

ArduCopter.cpp: In function 'void init_ardupilot()':
ArduCopter.pde:-1: error: 'SPI3' was not declared in this scope
ArduCopter.pde:-1: error: 'SPI3_SPEED_2MHZ' was not declared in this scope

I have spi3.h file include in ArduCopter.pde but somehow it's not working that way. I did fetch&rebase with original repo.

At 3:12pm on September 30, 2012, Marooned said…

Sorry for troubles. It's working now. Looks like Arduino IDE had some hiccup.

I should probably move to some better IDE as I'm using Arduino only for compiling/uploading and all files are edited in my fav editor and I have to restart Arduino every time I change something as it doesn't follow outside files changes.

Anyway, sorry for bothering you.

At 6:30pm on December 1, 2012,
William Premerlani

Hi Randy,

Regarding a question that Shyam asked about gimbal lock when he was trying to use APM to stabilize a camera, he and I finally solved the issue. Here is a link.

No one on diydrones was able to help Shyam, he finally contacted me directly.

Best regards,

Bill Premerlani

You need to be a member of DIY Drones to add comments!

Join DIY Drones


© 2015   Created by Chris Anderson.

Badges  |  Report an Issue  |  Terms of Service