After leaving the 'weather station' running for 24 hrs (with an added light meter LDR :) ) I return to find the batteries flat and the memory card acting strangely (can see files but not read them or copy them!)
The whole card appears to be kaput! Windows cannot format and a quick google for this app:
http://www.sdcard.org/consumers/formatter_3
doesn't work either. It appears that the card is NS. oh well. time to get on ebay for some replacement transflash!
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UPDATE
Found a 2Gb micro SD in an old phone :) have installed it and updated my code so it opens, writes and closes the file on each write operation (hopefully this will prevent SD card corruption!)
A blog for my arduino and microcontroller based electronics and technology projects
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