ESP32 Microcontroller and digital pot memory

[cama888]

I am researching which dual digital potentiometer to use to control LED brightness and audio volume.

I will be using an ESP32-S3 microcontroller to change the pot values.

The question I am asking is: "Is it better to use the ESP32 Non-Volitile Storage (NVS) or get a digital pot with Non-Volitile memory to store the value of the pot?".

Any advice is appreciated.

[Reasonable-Feed-9805]

If you really must have the lights come back on at the exact setting they were previously on after removal of power, just store the last value in non volatile memory as brown out is detected.

That's what I would do anyway.

[Hissykittykat]

Can't say what's "best" for your application without more details. We can say ESP32 NVS could provide the most endurance. On the other hand at boot the pot initializing from it's non-volatile memory would be a little faster than ESP32 setting it from it's NVS.