Replies to This Discussion

DeveloperPermalink Reply by Doug Weibel on May 19, 2010 at 8:54am

Check out your gps with Ucenter. Do a search here and there are a couple threads explaining how to do it. Possibly your ublox is faulty or misconfigured.

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3D RoboticsPermalink Reply by Chris Anderson on May 19, 2010 at 9:09am

It will often take 15 minutes to get lock the first time. Make sure the antenna is pointed to the sky.

The default is uBlox but you might check the config settings in the code to make sure that was the case.

Finally, Doug is right that the GPS module may be misconfigured. Here's the tutorial to check and reconfigure it if necessary.

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Permalink Reply by wilsonj on May 20, 2010 at 1:27am

Thanks guys. I have it all hooked up right. Checked and doubld checked. The GPS is warm, so I know its getting power, but I can't communicate with it. I followed the tutorial but the binary console is blank, no flashing green lights and when I go to upgrade the firmware I get "checking communication link"

I've tried all baud rates also, just in case.

What next? I bought it from DIYdrones store BTW.

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3D RoboticsPermalink Reply by Chris Anderson on May 20, 2010 at 4:56am

If the pins aren't bent in the connector (look closely to be sure), you may have a defective unit. In that case, please return it for a replacement.

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Permalink Reply by wilsonj on May 20, 2010 at 1:29pm

Hi Chris,

But even if the pins were bent in the connector that wouldn't affect it while connected by the jumper cables would it?

Looks like it will be going back.

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Permalink Reply by tais on May 22, 2010 at 9:01am

i've got the same problem with you!!!
our gps modules are warm or they are 'too warm'?
if you find out anything please let me know!!

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Permalink Reply by tais on May 22, 2010 at 9:07am

and i you find that we've got burned gps modules please tell me
how can i communicate with the store to replace the module.
thanks for your time!!!!!!!!!

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Permalink Reply by Leonardo Lisboa on May 22, 2010 at 6:16pm

I'll post my opinion here... I think uBlox has so many problems it's not worth the money. I had to fight a lot with mine to make it work (even not very well). It keeps dropping GPS lock, takes ages to get a lock, the antenna is very fragile, etc.
So, I got back to my EM406 and I'm very happy with it. Even with 1Hz update it is far better than uBlox.

Cheers,
Leonardo

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Permalink Reply by tais on May 23, 2010 at 12:09am

Leonardo thanks for your help,maybe i'll buy the em406 but i need to know if your u-blox
is heated.....some friends,using the chip of u-blox and say that is perfect!!!!!@@@@@#####
And one other,the em-406 works ok with the code of imu or you have to change something in the code???
of course i dont mean the "#define gps protocol 2" ???
thanks for yor time!!

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Permalink Reply by tais on May 23, 2010 at 12:12am

thanks leonardo but i need to know if the ublox module is heated when you connect it with the imu!
the em-406 works ok with the code of the imu or you changed anything?
thanks for your time!

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Permalink Reply by wilsonj on May 26, 2010 at 2:06pm

Well I got mine working!! Seems that when I put some heatshrink on the GPS to keep the daughterboard connected it must have tilted the plug slightly. I removed this and straightened the board and all seems to work.

I discovered that the GPS was running at 9600 though.So I flashed the firmware, installed the config for ardupilot and now I get a connection at 38400. All sees good. Now I have to see if I can get a lock outside.

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Permalink Reply by wilsonj on May 26, 2010 at 3:18pm

Woohoo, I got a lock! And it works with the ardu IMU also.

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