Replies to This Discussion

Permalink Reply by Iman Sadeghzadeh on January 3, 2013 at 11:33pm

Yes, I do get the red power LED on when I power the board or connect it to my computer using FDTI and adapter cable. But the red LED is dim and I have no blue (blinking or solid) LED at all.

Last night I received my FDTI and adapter cable and just tried to connect to my computer. When I was uploading .txt file I got this error. Since the UBLOX doesn't communicate with the software properly, (although COM port is ok and I can connect to GPS) I can not get any info about my GPS in the software.

• ▶ Reply

Permalink Reply by Bill Bonney on January 4, 2013 at 12:37am

I would contact 3DR support and see what they suggest you should do. it may need to be returned.

• ▶ Reply

Permalink Reply by Iman Sadeghzadeh on January 4, 2013 at 9:09am

They have generated a RMA number for return. But I want to make sure the problem is not from my side before return.

• ▶ Reply

Permalink Reply by Crashpilot1000 on January 4, 2013 at 2:17pm

Sorry that my advice with the FTDI cable didn't work out for you. Sometimes you have to swap tx/rx but when the connection was ok that should have been connected the right way. You will find the ftdi come in handy on several other occasions (minimosd etc) anyway :). I wish that the new year brings you a working gps!

Kraut Rob

• ▶ Reply

Permalink Reply by Iman Sadeghzadeh on January 5, 2013 at 12:54pm

Thanks Crashpilot1000 for reply. Anyway I need a FDTI in my box for future needs.

Iman

AdminPermalink Reply by Thomas J Coyle III on January 5, 2013 at 2:09pm

@Iman,

The dim red LED indicates that the pins on the GPS connector on the circuit board are not well soldered. I kept getting an intermittent power connection to the GPS when I would move the cable or touch the cable connector on the GPS circuit board. The solution was to use a very fine pitch tip on my Weller soldering iron, plenty of liquid flux, and a strong magnifying glass to reflow the connector pins to the respective pads on the circuit card. After that, no problems with the power to the GPS or the Tx/Rx signals.

Just a thought.

Regards,

TCIII 

• ▶ Reply

Permalink Reply by Iman Sadeghzadeh on January 5, 2013 at 10:31pm

@ TCIII

Thanks for info. In fact I am sending it back to 3DRobotics for repairs.

By their policy, they will not repair/swap if they find any sign of attempt of repair in the unit, so I just decided to send them back tomorrow. Also I'm not sure if I should send my APM 2.5 as well or not with GPS unit. Because I'm afraid of having a problem with APM board itself (at GPS port), since it sends 4.67 volts to GPS unit instead of 5V.

Regards

Iman

• ▶ Reply

Permalink Reply by Harry Courter on March 27, 2013 at 7:53am

I an currently ging thru this with my ublox module.  I had no signs of life, out of the box with mine.  After ordering replacment cable(s) and attemping to flash the firmware I contacted 3DR and sent it back with a supplied ground Fedex return lable.

Fedex has confirmed that they reiceved my return seven days ago, however, so far I have reiceved no response from them.

 

Meanwhile, I ordered the Mediatec gps module, because its cheep and I wanted to see if the problem was with me or my APM.  The Mediatec module powered up and obtained a lock without any trouble, and with the same cable I was using for the Ublox module.  So I am confident that my Ublox module is DOA, But still waiting for a response from 3DR.  The Mediatec module shows big drift, (50 to 80 feet from my actual position) so I cant see counting on this to get my beast home.

• ▶ Reply

• ‹ Previous
• 1
• 2
• Next ›
• Page