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sparkfun / OpenLog

Open Source Hardware Datalogger
https://www.sparkfun.com/products/9530
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openLog very inconsistent #174

Closed RichardBronosky closed 10 years ago

RichardBronosky commented 10 years ago

I have had my open log for about 3 weeks. I have been doing a lot of development with it connected to my 3.3v Arduino pro mini and a SanDisk 32GB card in it. I have noticed that it very rarely writes to the card. Sometimes I get the blue light blinking 3 times, but most of the time nothing.

nseidle commented 10 years ago

Hi Richard,

The flashing LED 3 times indicates a SD card init failure. More than likely this is due to an incorrectly formatted card. Be sure to stick to FAT32. What does OpenLog actually log, if anything?

If possible, do you have an older 1, 2, 4GB card around? Logging GB of data is pretty hard to do. I've tested extensively at 16GB, not at 32GB, but the SD library should be good up to 128GB. I've got a 32 and 64GB microSD cards on order so I can full replicate what you're up against. Let us know if you're still having problems.