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ESP32: Non-volatile storage support #4436
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while avoiding file system corruption which might occur during power outage in case data would stored in the file system (currently the only option).
An alternative filesystem which is robust against power outages during write is LittleFS, and this is due to be integrated soon. See #3847 for more details.
ESP-IDF provides NVS library:
I guess it could be exposed as a module, but it's more Python-like, and portable to other platforms, to use files for this purpose.
@dpgeorge
A question regarding storage of data in the current implementation of file system in ESP32 port - is it suitable for frequent rewrites of data? I mean is there some wear-leveling mechanism implemented? My goal is to store data in between deep-sleep wake-ups.Yes, please make a PR, it is worth it.
Which data types are currently supported by your implementation?- Reacted by mrwhy-orig
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on Feb 19, 2021 - added a commit that references this issue
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on Sep 21, 2026
This feature would be great for storage of configuration parameters, flags and other data in between power cycles or during deep-sleep while avoiding file system corruption which might occur during power outage in case data would stored in the file system (currently the only option).
ESP-IDF provides NVS library:
https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/storage/nvs_flash.html