It depends on application specific.
Me have f.e. Garland Switches, they toggled once or twice a day.
Can check those topics too:
Considering how cheap esp boards are, I dont really consider it an issue. Replacing a 2$ esp board isnt exactly on the same level as replacing 2000$ devices. Its not realistic have high expectations for a 2$ MCU.
Why don’t you want to write to flash? If it’s because fear of wearing it out, I think it’s a vastly overstated problem.
Here’s a quite from @OttoWinter himself:
So as a fundamental thing: Has anyone ever had the memory wear out? I hear a lot of people (IMO incorrectly) fearing about it, but never heard from a user actually experiencing this.
There’s also this answer on Stack Overflow,:
Anecdotal: I’ve had an ESP32 running for several years, saving to flash every hour, without any problem…
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