Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water.
New to EnviroDIY? Start here

Activity

JimMoore posted an update in the group Data Logger Developers 7 years, 2 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?
- Shannon Hicks replied 7 years, 2 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