We 're facing some troubles while trying to set up product based on EMX module and SD card.
We used to log data on microsdhc card from samsung. These are 4GB class 4 with transfer speed of 24MB/s. Recently we bought a set of 8GB microsdhc 1 of class 4 from the same manufacturer and we have a lot of problem. None of them can be written by the EMX board. Some of them can be read. Other were fine for the first write read phase but then become unreadable, for these lasts even windows on desktop recognize them as unfiormatted (and can’t format them)…
Is there’s any rule in choosing SD/µSD for GHI products?