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esp-idf/examples/storage/nvs_rw_blob
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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

README.md

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.