Shutter stopping in the middle forget Calibration

[RepiZoli]

Hi all

I made a Calibration for my shutters as Follows:https://tasmota.github.io/docs/Blinds-and-Shutters/#calibration

ShutterSetClose
ShutterOpenDuration 21 " its the opening time
ShutterOpen
ShutterSetOpen
ShutterCloseDuration 21

It works perfectly, but after some day (maybe a blackout) you open with the switch, it opens only still half of the shutter.. And if you check in tasmota, it shows the shutter is fully open.
After I make the calibration, it work again perfectly
Where can I made a mistake?
Can you help me?

Thanks in advance

Repizoli

[valdus2]

This has happened to me too using some Sonoff's Dual R3 v2. They just lost their calibration.
But to me happened in this time frame #21966
Now I have updated them and I wait...

[RepiZoli]

Hi have a same Sonoff Dual, but I do not understand fully your answer

1. What was the update exactly?
2. It Is working normal now?
   Thanks in advance

[valdus2]

It happened to me after 50 days online....They were in v13.3.0.
Now I have updated them to the latest development version,
and I wait to see their behavior...

[stefanbode]

Can you check the uptime of the device. The only situation I can think about that the known and the real position gets this far disconnected is a crash during operation with a reboot.
The position if the shutter is stored into the flash AFTER the movement is complete. This is no issue in most cases. But for sure you don't want to have a crash during operation or a power loss.

[joba-1]

only used this in early experiments with ESPs a long time ago, but wouldn't noinit-dram or RTC_NOINIT_ATTR be a solution for at least the software resets / crashes?

[stefanbode]

There is some rtc Memory that would also survive. Anyhow it does not help because this only correct if you assume the shutter immediately stops on a crash. This is not always the matter. Better approach is to hunt every crash and remove it.