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  • Profile picture of Jim Moore

    JimMoore posted an update in the group Data Logger Developers 8 years, 10 months ago

    I tried out the “Sleeping Mayfly logger example” and after I had installed the needed libraries and the sketch compiled I got an “SD card missing” error. The problem was that SD_SS_PIN in the example was 11. Worked fine when I changed it to 12. Is this the case for all Mayfly boards or was there a revision somewhere?
    While playing with this code my RTC got reset and this has happened a number of times and I am fairly confident that the watch battery is snug. Any thoughts on why this is happening?

    • Profile picture of Shannon Hicks
      Shannon Hicks replied 8 years, 10 months ago

      The SD select pin on all versions of the Mayfly is pin 12. There was an error in that example, so I just fixed it. As for your RTC losing time, I think you have a board that was sold before I started modifying all of the boards with a small blob of solder on the board under the battery holder. If you have a fine tip solder iron, you can do this yourself, or you can just add the solder to the bottom (negative pole) of the battery as shown in this photo: http://envirodiy.org/topic/rtc-time-kept-without-power-has-cr1220/#post-1606