I bought 6 sonoff devices and I tried upgrading to 3.3.0 on one device. The energy monitor most of the time doesn't work. It's like stuck to 0 Watt or whatever the last number is there. Sometimes it just drops to 0 Watt even when the AC is working.
I'm not upgrading the other devices. How can I revert to previous firmware to fix this?
I have the same, after upgrade to 3.3.0 values of Power and Current are for long time after swithing on.
I would love to go bak to previous firmware. Anyone has an idea how to do this?