It’s not clear that the card is bad, but pretty good chance given the timing and circumstance. This is what the several hundred bad cards that were shipped look like:
A copy of your last good config should be stored in the ESP8266 SPIFFS file system. Instructions for recovering are included in this post:
It can become necessary to build a new SDcard. This post describes how to do that. IoTaWatt uses a microSD card, formatted to FAT32. New units use a 8GB level 10 card. Any card 4GB-32GB level 4 or 10 will work fine.
Obtain a new microSD card or reformat an old card to FAT32.
Download the SD files from github SD directory
If using windows, this link will downlod the files into a .zip file.
Copy the files to the root of the SDcard.
If you were able to salvage the config.txt file from the ol…
