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There are two devices connected to my computer via USB. One of the devices receives a series of commands and then sends data to the computer every thirty seconds.

The other device will be a SD card drive. The goal is to save the data as a file on the SD card without over-writing any previous files. How do I distinguish between the devices? What command(s) is (are) appropriate for writing to an SD card without over-writing previous data?

Peter Mortensen
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Oliver Causey
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1 Answers1

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I solved this problem by saving the data to the harddrive. Then I wrote a routine using crontab that zipped the days files then transferred the files to a usb. I had to find the physical location of the usb by first identifying with the fdisk command.

This software was used in unison with the hardware I built on the International Space Station. The unit successfully mapped the radiation environment in low-earth orbit. I am very happy with the results.

Oliver Causey
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