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Author Topic: GPS & USB Interface  (Read 851 times)
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I've got an RC car that has a Copernicus GPS on it. If I am at my computer looking at the GPS signals coming in everything works great. If I detach the USB cable and instead let it write to the SparkFun OpenLog the GPS rarely gets a signal lock.

I have checked the voltage levels on the GPS and they look normal in both cases (3.3V). I can't figure out why the GPS doesn't work the same in both cases. I don't have the receive tied to the transmit line on the GPS because I figured I only want to receive data.

Any ideas what might cause this?

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Faraday Member
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Got a schematic?

Is the ground wire connected?


Central MN, USA
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Tesla Member
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When you had the GPS connected to your computer, were you closer to a window or door? My GPS module only works near an open window in my building. Have you tried outdoors?

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