Most likely, the power outage triggered a ‘fast powercycle detection’
Look down at SetOption65
Implemented for situations where a device cannot be reset to firmware defaults by other means (no serial access, no button). It resets ALL Tasmota settings (equal to
Reset 1) after 7 power cycles.
SetOption65must be set to0(default) in order for this feature to be enabled.Warning
If you have a weak power grid or frequent power brownouts its best to disable this feature with
SetOption65 1immediately or you’ll end up with firmware default devices after a brownout event.
Given this happened to ALL of them, I would assume this to be the case. So, all of your devices are probably reverted back to stock settings.
The good news is they are probably hosting their own wifi SSID so you should be able to connect to them and reload the configuration that I know you saved…right? Or you’re like me and forgot and had to set them all up again after the brownout…but you saved them this time, just in case.
And also disabled SetOption65.