I now use a separate NVS for my data, and put the data as blobs. It does seem cleaner. Thanks for the suggestions! I have now set the size of the original NVS at 0x2000 (so far all is ok), and my custom NVS at 0x3000. This turns out to be surprisingly small for my application. What gave me a bit of ...

Looks rather straight forward, thank you, I will try!

Can you tell what the minimum size of the original nvs must be to keep all things working?

Thank you. Doesn't seem to be as easy as it initially looked. One would assume that "Free Entries" has to be at least greater than zero, but the docu isn't very forthcoming in explanation: Arduino or c-string String types use a minimum of two key table entries with the number of entries increasing w...

I use an ESP32-dev with the Arduino framework (on platformio under vscode), and the NVS storage with the preferences lib for some log data. I am quite pleased how easy and reliable this lib can be used. But I now tried to expand the storage of strings and I am running into unexpected limits. The Esp...

@ESP_Dazz: I tried your code, but failed to get a benefit. I now hope for some further help. I am using an ESP32 under vscode with platformio, using the Arduino framework. Overall the program works, but fails on WiFi transfer with a Task-WDT fail when a binary file to be transferred is bigger than a...

here:

This looks like the 3rd web server problem in a row, and I have the same suggestion:

before you spend more time on this I suggest to use the ASYNC server:
https://github.com/me-no-dev/ESPAsyncWebServer
A bit steeper hurdle to start, but at some point you will need it anyway!

Ignore what you have done so far and use @Ibernstone's advice and use the ASYNC server.
At some point you'll need it anyway, why not start right away?

before you spend more time on this I suggest to use the ASYNC server:
https://github.com/me-no-dev/ESPAsyncWebServer
A bit steeper hurdle to start, but at some point you will need it anyway!

Not sure what to do with these numbers. As my voltages change very slowly, I don't need the impedance and can ignore the 2pF.

When I naively(!) take the 50nA and the 3.3V, I get by Ohm's law 3.3/50E-9 = 66 MegOhm.

Hmmm. This would be very high. Realistic?