About

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Male


Location

Santa Clara, CA


Please tell us a bit about your UAV interest

Interested in DIY projects


Hometown:

Santa Clara, CA


Activity Feed

Larry M replied to Mirko Denecke's discussion Tested hardware for BBBMINI in BBBmini
"Thanks Mirko! 
The MavLink_FrSkySPort project looks compelling, which converts Mavlink to FrSky telemetry using a Teensy.  Would it be as simple as connecting this to P7 on your board and calling the executable with -C /dev/ttyO4 ? "
Sep 24, 2016
Larry M replied to Mirko Denecke's discussion Tested hardware for BBBMINI in BBBmini
"Anyone know if the BBBMINI is compatible with any of the FrSky receiver telemetry outputs? I notice that some Pixhawk users use an RS232 to TTL converter to talk to the FrSky D and X receivers, and was wondering if BBBMINI could do the same. Am…"
Sep 19, 2016
Larry M replied to Mirko Denecke's discussion I have a BBBMINI PCB / I need a BBBMINI PCB in BBBmini
"Hi Linus,
The ShenZhen2U site does say they offer V1.5, though the picture is still V1.4.  From the website:
Product include:

1x Bare BBBMINI PCB (Ver 1.5)
CAN Transceiver (MCP2562-E/P) with DIP8 Socket
All Break-away 0.1" Male Header
All 0.1"…"
Sep 11, 2016
Larry M replied to Mirko Denecke's discussion I have a BBBMINI PCB / I need a BBBMINI PCB in BBBmini
"It looks like ShenZhen2U is now offering the BBBMINI PCB 1.5 plus headers and CAN transceiver for $9.90 (US) + $4.25 shipping.  They also offer the option to include the sensors for and additional charge.
http://www.shenzhen2u.com/BBBMINI.html
Maybe…"
Sep 11, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"I never did get much response on this thread (except for you Micha, thanks!).  I'm guessing that is because EKF errors can be difficult to troubleshoot.I did finally find out what was wrong with my quad.  I'm updating this thread so that anyone in…"
Apr 7, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"Micha, thanks for reviewing the data and suggestion! I'm suspecting a compass issue here too. I'll run the compassmot test to see if interference could be a factor here. I don't have a current monitor, but it looks like there is a way to run the…"
Apr 6, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"I'm going to bump this thread.  I posted a week ago, still stuck and looking for answers!  I'll bet there are a few folks out there with some familiarity with EKF who can tell me what might be going on.  Note: I've had many hours of successful…"
Apr 1, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"EKF position and velocity innovations, below. "
Mar 27, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"Incidentally, see plot below for GPS latitude.  The trajectory below is fairly smooth, not much noise.  The delta over the 2 minute time interval was 0.0004 deg, or about 7e-6 radians.  This corresponds to about 44 meters over the two minutes, which…"
Mar 27, 2016
Larry M replied to Larry M's discussion [SOLVED] Need tips troubleshooting EKF errors, log file attached
"Still looking for some tips on how to go about diagnosing the EKF errors.  I'm suspecting a bad sensor, and am nervous about taking my quad out again before I have a good idea on what might be going on.  Here is a screenshot of the EKF estimated…"
Mar 27, 2016
Larry M posted a discussion
Hi All,Today's flight felt very unusual.  No crashes, but I frequently felt my quad was behaving strangely. I checked the log file and note that over my 20 minute flight, it threw the error EKF_CHECK-2 (subsystem 16, error code 2, bad variance) 20…
Mar 26, 2016
Larry M replied to Mirko Denecke's discussion Discussion about software issues in BBBmini
"I'm curious, is there a way to reliably upgrade the Kernel without reflashing the whole eMMC (as you advise in your instructions)?"
Dec 30, 2015
Larry M replied to Mirko Denecke's discussion Discussion about software issues in BBBmini
"That's great to hear that the official release 3.3.2 supports BBBMINI.  I'll probably stick with the current build I have since everything seems to be working well, and hold out for 3.4.  At some point (when the right amount of new features have…"
Dec 30, 2015
Larry M replied to Mirko Denecke's discussion Discussion about software issues in BBBmini
"Hi Mirko (& all), 

Mike's question got me thinking about ArduCopter branches as well...

I've now logged many successful flight hours on my BBBMINI quad that I'm fairly confident that the ArduCopter build I am using is robust.  However, in…"
Dec 27, 2015
Larry M left a comment on BBBmini
"Had a nasty crash yesterday.  Thanks Mirko for your help reviewing the dataflash log and fixing the problem! The copter flies perfectly now.
A big tip to BBBMINI users... Don't forget Step 28 on Mirko's software instructions:
Adjusting the BBB clock…"
Nov 28, 2015
Larry M replied to Larry M's discussion Linux autopilot users -- Please help with postmortem
"Mirko, Patrick, Bill,

You guys are awesome!  I just had a textbook 19 minute flight with my Beaglebone Black.  I reviewed the log file and unlike before, not a single missed dataflash log entry.  MaxT was between 5-7 msec the entire flight (except…"
Nov 28, 2015
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