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Real time communication of quad with MATLAB

Started by Nisal Hemadasa. Last reply by Nisal Hemadasa yesterday. 2 Replies

Hi all,I'm using a 3DRobotics teletry kit and I'm trying to make my 3DR qaudcopter to communicate realtime withMATLAB. Since the telemetry kit has a UART interface, I tried creating a serial object…Continue

Building Copters with Round Tubes - Stronger, Lighter, Easier to Mount Motors than Square Tubes

Started by Forrest Frantz. Last reply by Cala on Tuesday. 511 Replies

Round tubes offer the following pros:handle twist better than square tubes.  Thus for the strength, are far lighter.are more readily available (pipes, tubes, arrows, kite frames, golf clubs and…Continue

Minimosd disappears

Started by jvmolo. Last reply by Cletus Berkeley on Tuesday. 12 Replies

HiAfter 15 to 30 seconds, the flight data disappear from the screen. Any idea why?ThanksContinue

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Comment by mark on July 24, 2013 at 2:07pm

Thanks @iskess. I just posted this there for those following this:

Hi,

I have been working on my future arducopter for almost a month now mainly getting parts from various vendors in china, rctimer being one of them. In any case, I have run into what seems like a roadblock with the gps on this quadcopter as everything seems to be flashing pretty but nothing is registering in with ardupilot Mission Planner. I just get a "NO GPS'. So I am stumpped as to what to do with this.

I went through this great post (kudos to the author) and it helped a lot. I even did all the terminal setup reset ect.. but nothing.

I put a video up for those who have more knowledge that I do with this sort of stuff.

http://www.youtube.com/watch?v=3XchFe_zFBw

Any help would be much appreciated... Thanks in advance.
--mark

Comment by iskess on July 24, 2013 at 12:12pm
@Mark,
Go to this thread: http://www.rcgroups.com/forums/showthread.php?t=1820773
Read through post #6 and follow the instructions closely. If you still have issues afterwards, post on that thread.
Comment by Rohan Jain on July 24, 2013 at 12:05pm

Hi everyone, please spare a moment to look at this post. http://diydrones.com/forum/topics/guaging-diy-community-interest-in...

I'm trying to get an idea about the kind of interest the DIY community would have in consumer applications.

Comment by Charles lakins on July 24, 2013 at 11:35am

no gps and gps lock are two completely different messages when the apm doesnt see it attached you get no gps or when your not connected to the apm mavlink protocol

when you are connected to the apm and have no lock it will read GPS: No Fix

 

Comment by Wayne Morris on July 24, 2013 at 10:25am

@Mark, if you look at the board with the motor outputs facing you, Just above the motor outputs is a two pin jumper. I don't know if you put the header in or not. This bridges the ESC power side to the rest of the board. I went to look at the rctimer site and their photos has the header and jumper included and the board shows the connection as JP1.

My GPS does not get satellite GPS lock indoors. The No GPS on the planner means you don't have lock. The GPS maybe working fine but you can't lock inside. Take it outside and wait several minutes. The GPS should find the satellites and you will then see GPS lock on the MP. 

Comment by John McGrath on July 24, 2013 at 10:05am

@Oliver  thanks buddy I appreciate that info. Always learning :-)

Comment by Oliver on July 24, 2013 at 8:43am

@John McGarth

John, if the hex isn't level on the ground or if it has been rotated after arming the motors may spool up quite differently from one another as the craft is trying to orient itself, very noticeable if you are applying only a little throttle. The test is to spool up to where the hex is light on its feet, or even just lifts off. If there is indeed a problem you'll know it then. I got spooked by the same thing early on.

Comment by John McGrath on July 24, 2013 at 8:21am

Ok just brought the Hex into the shop hooked everything up again to diagnose issue and the motor works 100% i tapped on the esc etc etc.. seems to work fine.. A possible glicth with the apm? Interesting.

Comment by John McGrath on July 24, 2013 at 8:11am

Need a little help here. I have a month old Hexa from 3Dr. I was testing my gimbal this morning and when I when to launch one of the motors was not spinning much should I look at the motor going out or esc?  A month old not good at all.

Comment by mark on July 24, 2013 at 7:33am

Hi Wayne, Bill, et al,

I just uploaded a video of my setup and apparent problem.

https://www.youtube.com/watch?v=beOt-r2cU7s

I am really excited to get this thing in the air. I believe it has all the components... but I must be not doing something correctly.

Any advice/ suggestions are more than welcome.

Thanks to all viewers,

mark

 
 
 

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