Sonoff Pow R2 persistent total over unexpected shutdown

[mikhail5555]

Hey,

I am using a Sonoff Pow R2 behind another power switch which I often turn off.
Now I understood from #3689 that its a feature that the total power is only stored in flash at midnight.
Which leads to the following: (Total power resetting to last saved point on boot).


Is there a way to make this total power usage save on either shutdown or some timely trigger?

[barbudor]

Hi @mikhail5555
The point is not to write to often to the flash in order to avoid wearing it too early.
Also I would say that willingly shutting down an IOT device is not really what is intended. Don't forget that in some circumstances that could trigger Tasmota recovery procedure, erasing all settings.

This being said, command SaveData without any parameter will force saving of values in the flash.
You can then use either a rule based on Time or on a Timer to execute the command.
A rule like below will regurlarly save every XX minutes (here, every 60 minutes...):

ON Time#Minute|60 DO SaveData ENDON

Or if you want to save at specific time of the day, you can use a Timer to trigger at a certain time of the day a rule such as:

ON Clock#Timer=1 DO SaveData ENDON

Here, assuming Timer 1 as been set up to run a rule at your time of day choice.

A last option which may not be easy would be if you can trigger a button/switch just 2 seconds before the power is cut, you could also handle that in a rule.

Cheers

[mikhail5555]

@sfromis Could you please explain what exactly you mean with a 'orderly shutdown'?
I set the Sonoff Pow R2 output to off before i shutdown the device.
Since I only use my 3D printer so often, I am okay with writing to flash every time it turn off power to the printer.

[sfromis]

What I mean by orderly shutdown is to tell Tasmota to shut down, meaning a restart. Of course, you can also get the settings data (including energy consumption values) saved by other means, as suggested already.

[mikhail5555]

Unrelated but are you sure this is possible? Since in the Commands wiki I am unable to find any 'shutdown' command

[sfromis]

Well, I already wrote "a restart". That is a command which will shutdown first.

[ascillato]

are you sure this is possible? Since in the Commands wiki I am unable to find any 'shutdown' command

Restart 2 is shutdown

https://tasmota.github.io/docs/Commands/#restart

[barbudor]

Rule1 ON Power1#state=0 DO SaveData ENDON

Very good idea 👍
As far as incoming power is cut only once after you powered off the load, that's correct.
That just won't protect you against unexpected power cut. But if you loose main power during a print, power consumption will be your least worry 😱

[mikhail5555]

Haha very true, and I mean, once the power is off, the energy usage is usually done for today. I actually slightly expected this to be default, but I am happy its so easy to add/adjust.

[barbudor]

indeed restart 2 seems to be a shutdown

[mikhail5555]

Hmmm i guess i have to mark this as not solved, after some more experiments it still seems as its not being saved to flash.

I tried wtih both Restart 1 and SaveData, unless restart device with configuration saved to flash doesn't save things like usage numbers.
Do you maybe have any idea @barbudor what is causing this? (I am sure the rule is being triggered, as i tested this and have seen it in the console output).