How to fix ESP-IDF fatal error: nvs_flash.h: No such file or directory

Problem

When building an ESP-IDF project, you may encounter the following error:

/home/user/MyProject/main/main.cpp:6:10: fatal error: nvs_flash.h: No such file or directory
    6 | #include <nvs_flash.h>
      |          ^~~~~~~~~~~~~
compilation terminated.

Solution

You need to ensure that the nvs_flash component is included in your project. This can be done by modifying your main/CMakeLists.txt file to include the nvs_flash component as a dependency.

You can do this by adding the REQUIRES nvs_flash line in your idf_component_register function. Here’s how to modify your main/CMakeLists.txt file:

idf_component_register(
  SRCS "main.cpp"
  INCLUDE_DIRS "../include"
  REQUIRES nvs_flash
)