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Randy's Groups

Randy's Discussions

ArduCopter-3.2 beta testing

Started this discussion. Last reply by Paul La Fors 1 hour ago. 801 Replies

ArduCopter-3.1 released!

Started this discussion. Last reply by Emin Bu on Friday. 1508 Replies

Running SITL on Windows

Started this discussion. Last reply by Steven McAdam 9 hours ago. 48 Replies

 

Welcome, Randy!

Latest Activity

Paul La Fors replied to Randy's discussion ArduCopter-3.2 beta testing
"Christian, "Ah, that explains the Failsafe warning when powering on without active TX." Wish you were right :-( For me it does'nt matter if my Taranis is on or off. My values are: TX on = 1015 TX off = 991 FS Pwm = 1003 so it always…"
1 hour ago
Peter van der Pol replied to Randy's discussion AC-3.1 autotune support discussion
"Hi Jim,I'm pretty sure that the PWM values are changing correctly, I've also ruled out that it could be a defect channel or something like that because when I assign a different function to the same channel + Switch it is working…"
2 hours ago

Developer
Randy commented on Tilman Griesel's blog post OpenFPV Update 1 - Modular telemetry with JS and HTML5 (VIDEO)
"@Tearig, that simulated view is incredible!  Wow.  I'm speechless."
8 hours ago

Developer
Randy commented on Tilman Griesel's blog post OpenFPV Update 1 - Modular telemetry with JS and HTML5 (VIDEO)
"@Daniel, ok thanks for that.  So a better approach would be to use some other image capture rather than the one built into opencv.  I've certainly seen at least one person do this so it's possible.  Thanks again."
8 hours ago
RYUICHI YOKOYAMA commented on Randy's group Japan ArduCopter Group
"自作T6機のローターを安物カーボンから、折りたたみ式の15.5インチに交換。ついでにモーターを覗いてみると。ゲッ!!  エナメル線の被覆に傷を発見。しかも、グルリと一周傷が入っている。 ランディング時に巻き上げられた小石等が混入してなかで回ってしまったらしい。 それも6個中2個のモーターに。 モーターを交換したくても廃盤になってしまってるらしく、購入したくても出来ない状況。 全交換すれば3万コース。中国のおネーサンにできて、俺に出来ない訳は無い。 全モーターのエナメル線の巻き直しを決意したのであ…"
8 hours ago
Steven McAdam replied to Randy's discussion Running SITL on Windows
"I keep getting autotest.py not found...any ideas?"
9 hours ago
Christian replied to Randy's discussion ArduCopter-3.2 beta testing
"If you are using pixhawk, be sure to set serial_baud1 to 57k and btw set the serial CTSRTS check to 0 if you don't have the 6 pin connector(only 4) So do you get a message "no heartbeats" or what message?"
12 hours ago
Conanony replied to Randy's discussion ArduCopter-3.2 beta testing
"3.1.5 is fine but 3.2-rc3 is not. Has this been reported as an issue to the devs and how many are having this issue? I cant get an RSSi value as I can't connect, period. Can't do compass calibration, can't fly, can't test. If…"
15 hours ago
Brit Davis replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, Any chance this bug is present in 3.1? I never figured this out, maybe this is it? http://diydrones.com/forum/topics/help-with-err-fs-batt-1-and-fs-radio-1?xg_source=activity  "
17 hours ago
Jim White replied to Randy's discussion AC-3.1 autotune support discussion
"Peter, I'm not at all familiar with your equipment. As I suggested above the test to assure your radio CH8 is making it to the APM is to use the radio calibration mode of Mission Planner to see if CH8 changes when you flip the CH8 switch on…"
18 hours ago
Joseph replied to Randy's discussion AC-3.1 autotune support discussion
"I had this happen a few times and found out it was a silly thing. Over time my Turnigy Radio calibration for center changed ever so slightly so i never noticed it while flying. But the APM and Pixhawk did. So I re calibrated in Mission planner and…"
19 hours ago
Christian replied to Randy's discussion ArduCopter-3.2 beta testing
"Ravi, I didn't connect the second compass, but if you want you can try connecting it to the I2C hub adaptor board. It should be delivered with pixhawk. I think there are 4 connectors who are "sharing" the one I2C of pixhawk."
19 hours ago
Christian replied to Randy's discussion ArduCopter-3.2 beta testing
"Ah, that explains the Failsafe warning when powering on without active TX. Btw, I have seen, that FS_GCS was changed from 0 to 2 during update to RC3. I changed back to 0. Don't want trouble when my connection is lost. Could sb confirm that?"
19 hours ago
Fabio replied to Randy's discussion ArduCopter-3.2 beta testing
"Hello Christian, I had a similar problem after a few meters the signal decreased until you log out, after searching I found the antenna connector of the modem unsoldered with small cracks on welds. I believe that with the vibrations create these…"
21 hours ago
Frank Al replied to Randy's discussion ArduCopter-3.2 beta testing
"Thanks for your replies Randy. I'm using the same version of MP. Meanwhile I did several reboots and till so far 3 distinctive values are reported for COMPASS_DEV_ID2. So let's wait a while for other reports."
21 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"I wonder if perhaps you've got an old version of the mission planner.  I'm using the beta version (1.3.7 build 1.1.5307.24027).  Anyway, let's see if other people bump into the same problem."
21 hours ago

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: http://www.youtube.com/channel/UCm393BzMOyRPUo8MtKp5alg
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.
Hometown:
Karuizawa, Japan

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Randy's Blog

Red Balloon Finder

Posted on June 17, 2014 at 5:04am 30 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…

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GPS Glitch detection in AC3.1

Posted on December 14, 2013 at 6:42am 32 Comments

AC3.1 is going out very soon and includes a new safety feature called GPS glitch detection.  There's a wiki page about it but I'd like to highlight how it works because it's near the top of the list of safety issues.  The method…

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Dropping a Rover from Hexacopter - Part III

Posted on August 22, 2013 at 7:40pm 30 Comments

As a follow-up to the rover drops #1 and #2 I spent a day with Assistant Professor Nagatani-san of…

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UAVs for measuring radiation levels in Japan

Posted on April 11, 2013 at 6:38pm 11 Comments

Two years after the March 11th tsunami in Japan that triggered the Nuclear disaster at the Fukushima power plant, there are still just over 300 thousand people who have not been able to return to their homes due to…

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Dropping a Rover from Hexacopter - Part II

Posted on March 15, 2013 at 12:32am 14 Comments

As a follow up to an indoor test we did a about a month ago (blog post here), Assistant Professor Nagatani-san of Tohoku University, Izu-san of…

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Comment Wall (23 comments)

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

Randy

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.

Jack 

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,
T3
Aerhead
said…

Randy

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

Larry

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.

2012-05-16%2018-12-25.tlog

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,
T3
William Premerlani
said…

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

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