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GPS Shield troubleshooting sequence?
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GPS Shield troubleshooting sequence?

by malc on Wed Aug 06, 2008 4:57 pm

Hi,
I built my GPS shield, and it appears to not be working under the various test programs found in the downloads section. I have checked for solder bridges, etc.

Does anyone have a troubleshooting sequence for this board? If so, I would love to get whatever information you have.

thanks much!

malc
 
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Joined: Wed Aug 06, 2008 4:53 pm

by adafruit on Wed Aug 06, 2008 5:59 pm

more information about what is "not working" would be helpful

adafruit
 
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Location: nyc

by malc on Wed Aug 06, 2008 9:24 pm

ladyada wrote:more information about what is "not working" would be helpful


It looks as if the board is completely inactive. Not sure where to check. The 5v, and 3.3v supply seems to be ok. I'm not sure how to check if the GPS unit itself is working. I have a good scope and dvm for checkout if required.

When I run the GPS Test Parser sketch, all I see is the initialization "GPS Parser" output.

When I built the board I installed the jumper (TX), as in the picture, not sure if I missed jupering anything else.

The kit had one extra 10k resistor, and was short a 4.7k one. I found a proper resistor in my collection.

Thanks in advance for your help.

malc
 
Posts: 23
Joined: Wed Aug 06, 2008 4:53 pm

one more item

by malc on Wed Aug 06, 2008 9:47 pm

Additional info.
It looks like GPS_PWR is at ground. With the GPS sensor unplugged, I see ground on all of the pins of the white gps connector.

malc
 
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Joined: Wed Aug 06, 2008 4:53 pm

by adafruit on Wed Aug 06, 2008 10:19 pm

the GPS is must be turned on with the transistor
http://ladyada.net/make/gpsshield/wiring.html
check the transistor wiring

adafruit
 
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Joined: Thu Apr 06, 2006 4:21 pm
Location: nyc

by malc on Wed Aug 06, 2008 10:41 pm

My dumb, missed the section on the jumpers.
Thanks for all of your help, and say hello to Lord Byron when u get the chance.

One thing that would be really helpful on future boards would be a set of test contacts that you could work your way through. That way, a person could start out on the 5v pin, go to the 3.3v pin, ..... This used to be real helpful in the olden days.

Great job on your product!!

malc
 
Posts: 23
Joined: Wed Aug 06, 2008 4:53 pm

Please be positive and constructive with your questions and comments.