I am in Australia and I have a couple of ceiling fans which are Skyfan DC units. I bought a couple of the Skyfan DC WIFI Modules from here
https://www.egglec.com.au/post/skyfan-dc-guide-for-home-assistant .
I already had a couple and they work well. I managed to misplace the encryption keys for the other couple that I have and cannot get them to work. I can write yaml files to them but they then ask for an encryption key and when I use the one in the new file it does not work. I am presuming that it is looking for the original key.
The hardware says ESP-12F and the SKU is SFDC-ESP8266. Can anyone advise me on how I can revive these units? I only just found an original .bin file but I have no experience in flashing devices so I am really lost. I emailed the person that sells them but I have not received a reply. Any help would be appreciated, hopefully, this is something really simple that I have missed.