after I tried to update the firmware of my Ruuvi Tag using the Ruuvi Station android app (from a very old firmware, that wasn’t displayed in the app), it started flashing a red light. Repeated tries to update the firmware lead to the same result (the app reports that the update was successful). I also tried using the nRF app, but the update finishes “successfully” and the tag keeps flashing a red LED after the update is finished.
I also tried putting on fresh batteries, also without success.
Before (and after) I failed to update this one tag, I succeeded updating the firmware from 2 other tags of the same batch.
What does the flashing red LED mean? And how can I fix the tag?
Thanks in advance,