ESP32 IDF NVS library

All functions have comments.
Attention: .create() functions only create the key-pair if the key not exist. If it already exists with any value, the value will NOT be overwritten, the last value will remain.

Simple example to create, read and write

NVS cfg;
cfg.init("nvs", "test"); //Init NVS partition.
cfg.create("wifi_sta_ssid", "1234567890"); //Create ONLY if key not exist in memory.

char password[32] = {0};
cfg.read("wifi_sta_ssid", password, 32); //Read nvs-string key up to 32B.

ESP_LOGI(__func__, "WiFi passowrd: [%s]", password);

//If password does not contain string "abc", rewrite new password.
if (strstr(password, "abc") == NULL)
{
    cfg.write("wifi_sta_ssid", "abc1234567890");
    esp_restart();
}