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?
More than 2 month waiting a "little fix". This is not just a "waiting for solution", this is a torture and a huge lack of respect with sonoff users