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Ultimate GPS doesn't work with 32u4 Datalogger feather?
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Ultimate GPS doesn't work with 32u4 Datalogger feather?

by yakatz on Thu May 09, 2019 1:15 am

My Ultimate GPS (v3) works fine with my knockoff Uno. My datalogger feather works fine with all the sample code I have run (SD card contents, simple GPIO tasks), but no matter what I do, I can't get the GPS messages to show up on the datalogger. I have tried using hardware serial and software serial on a bunch of different pins (all the same software serial code that works on the Uno) and haven't gotten anything. The GPS module gets power and (according to the light) gets a fix.

yakatz
 
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Re: Ultimate GPS doesn't work with 32u4 Datalogger feather?

by franklin97355 on Thu May 09, 2019 1:31 am

What code and pins are you using for the tests? So you can write data to the SD card just not from the GPS? Can you read raw GPS data?

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Re: Ultimate GPS doesn't work with 32u4 Datalogger feather?

by yakatz on Thu May 09, 2019 10:17 am

I can't even get raw GPS data on the datalogger, but it does work on the Uno. I tried 0 and 1 with hardware serial Serial1, and several combinations of other pins with software serial. My Uno has LEDs connected to every pin and I can see the pulse of the GPS TX, and when I use pin 13 on the datalogger, I see the same thing, so I know the data is coming in, but I can't get it to actually read the data.

To test, I am using only the sample code (with while (!Serial); added at the top of setup if it wasn't there).
I have copied the code here for reference.

On the datalogger, I can successfully run CardInfo and DigitalInputPullup with a variety of different pins, but when I run echo or parsing, I get no output showing from the GPS module.

When I run the same code on the Uno with (minus CardIno since it doesn't have a card reader), I do get GPS data.

yakatz
 
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