Hi dmacgreg,

The LED is tied to mooshimeter processor activity, so there’s not many meaningful codes to extract. This is something I hope to improve in a firmware update. Right now the only meaningful patterns to look for are:

– Long slow blink (1 sec on, 1 sec off): The meter is in bootloader mode.
– “Chirp” of multiple blinks a fraction of a second apart: The meter is sampling. So if you set the meter to log at a 10s interval, you’d expect to see a chirp every 10 seconds
– Periodic blink to check status of SD card. I believe that’s what you’re seeing right now.

There’s no blink pattern associated with battery condition right now. You can check battery condition from the app when you are connected to the meter.

Hope this helps, best
~James