Saving circular buffer in flash memory of esp32

[aneeshp123]

We are making a project where we are supposed to store sensor readings in a circular buffer of 1000 sensor readings in the flash memory. What should be the approach?

[HAD1406]

Please reply as soon as possible.

[MicroController]

Approach:

if (isBufferFull()) {
deleteOldestEntries();
}
appendNewEntry();

Options:
a) Use a file system and store the data in files - may be the easiest way but also the most inefficient.
b) Use the partitions and flash API to write directly to flash, rotating writes and erases in a dedicated partition of at least 2 pages.

Don't try and use the NVS API. It's not made for this scenario, and as others have already found out may work somewhat but clumsy at best.