I just received an OpenMV Cam 2 and my initial goal is to read/write images to the SD card.
Plugging the board into my PC (Ubuntu 14.04) with no SD card attached displays as a 49 KB volume - which I assume is the internal flash acting as the default file system. I get a cascade of LEDs and then a couple red blinks and then no LED output. I am able to use the OpenMV successfully with the IDE and without the IDE. Nice!
However, when I try to use the SD card - I run into troubles. My SD card is 28 GB and formatted as FAT32. When I insert it into the connector and then attach to my PC, the board is not recognized at all by the PC and a different LED sequence occurs: a blue/white blink infinitely.
So my questions are:
-What does this LED pattern mean?
-Are there any other steps needed to using the SD card? Do I need to write the firmware to the SD card before trying to use it?
-Is it possible to use both the internal flash and SD card simultaneously? Can I run a script out of the internal flash and just use the SD card as bulk storage?
-Could these issues be due to the size of the SD card? I’ve read that smaller is recommended.
Thanks for any help anyone can provide.