mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00

History

Ivan Grokhotkov 979fce0df5 bt: call nvs_flash_init in examples, show error if NVS is not initialized NVS is used to store PHY calibration data, WiFi configuration, and BT configuration. Previously BT examples did not call nvs_flash_init, relying on the fact that it is called during PHY init. However PHY init did not handle possible NVS initialization errors. This change moves PHY init procedure into the application, and adds diagnostic messages to BT config management routines if NVS is not initialized.		2017-07-17 21:29:50 +08:00
..
main	bt: call nvs_flash_init in examples, show error if NVS is not initialized	2017-07-17 21:29:50 +08:00
Makefile	Moved examples to new folders / categories. Removed example numbers from example names	2017-01-16 23:08:35 +01:00
README.md	Updated links to examples in new folders / categories in api documentation	2017-01-16 23:08:36 +01:00

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.