Re: Data Logger Shield (HCARDU0093)
Hi Andrew, this is a great little board and works fine on the Uno. Can you confirm that the modifications you suggested for the Mega are also required when using the Leonardo?
For my application I found that the SD library used a bit too much SRAM on the Uno, but the extra half-a-kilobyte available on the Leonardo is perfect to cover my needs. I tried a smaller SDFat library with the Uno, which kind-of worked. https://github.com/greiman/SdFat
. It reduced the memory footprint requirement but it also has significant restrictions, such as, it cannot create files, they must exist already on the SD card and cannot be resized. I think the better option is to add the hardware mods to the shield and use the extra memory of the Leonardo (32u4).