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Sonoff POW R2 Energy monitor drops to 0 on new update 3.3

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? 

18 people have this problem

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Alright, that's really helpful, I found a solution for my problem hope everyone finds their solution too.

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i too have same problem guys. i m using SONOFF POW R2 without knowing the problem in firmware 3.3.0 i updated nearly five devices.


galacticrft & decocraft


has anyone updated the firmware to 3.5.1? 

very informative information thanks & if you want the mini Militia old version it's the best site for download.

these a few bug in this new update 3.0. i m facing lot of issues.



Very informative and helpful forum, and thanks for sharing such an amazing information.

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I use Sonoff POW R2 for real-time monitoring. This will no longer be possible after the 3.3.0 software update. Correct the mistake krnl

Well, it is very useful, I found a solution to my problem, hopefully, everyone will also find a solution. Bee TV


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