History

Sagar Bijwe 1df85e0039 nvs_flash: Version compatibility check for nvs storage This change adds a check for compatibility between the nvs version found on nvs flash and the one assumed by running code during nvs initialization. Any mismatch is reported to the user using new error code ESP_ERR_NVS_NEW_VERSION_FOUND.		2018-08-05 00:00:56 +00:00
..
main	nvs_flash: Version compatibility check for nvs storage	2018-08-05 00:00:56 +00:00
Makefile	Moved examples to new folders / categories. Removed example numbers from example names	2017-01-16 23:08:35 +01:00
README.md	docs: Switch base URL from esp-idf.readthedocs.io to docs.espressif.com	2018-06-19 11:23:33 +00:00

Non-Volatile Storage (NVS) Read and Write Example

Demonstrates how to read and write a single integer value and a blob (binary large object) using NVS to preserve them between ESP32 module restarts.

value - tracks number of ESP32 module soft and hard restarts.
blob - contains a table with module run times. The table is read from NVS to dynamically allocated RAM. New run time is added to the table on each manually triggered soft restart and written back to NVS. Triggering is done by pulling down GPIO0.

Example also shows how to implement diagnostics if read / write operation was successful.

If not done already, consider checking simpler example storage/nvs_rw_value, that has been used as a starting point for preparing this one.

Detailed functional description of NVS and API is provided in documentation.

See the README.md file in the upper level 'examples' directory for more information about examples.