参见文档：esp-idf/components/nvs_flash/include/nvs.h

#define ESP_ERR_NVS_BASE                    0x1100                     /*!< Starting number of error codes */
#define ESP_ERR_NVS_NOT_INITIALIZED         (ESP_ERR_NVS_BASE + 0x01)  /*!< The storage driver is not initialized */
#define ESP_ERR_NVS_NOT_FOUND               (ESP_ERR_NVS_BASE + 0x02)  /*!< A requested entry couldn't be found or namespace doesn’t exist yet and mode is NVS_READONLY */
#define ESP_ERR_NVS_TYPE_MISMATCH           (ESP_ERR_NVS_BASE + 0x03)  /*!< The type of set or get operation doesn't match the type of value stored in NVS */
#define ESP_ERR_NVS_READ_ONLY               (ESP_ERR_NVS_BASE + 0x04)  /*!< Storage handle was opened as read only */
#define ESP_ERR_NVS_NOT_ENOUGH_SPACE        (ESP_ERR_NVS_BASE + 0x05)  /*!< There is not enough space in the underlying storage to save the value */
#define ESP_ERR_NVS_INVALID_NAME            (ESP_ERR_NVS_BASE + 0x06)  /*!< Namespace name doesn’t satisfy constraints */
#define ESP_ERR_NVS_INVALID_HANDLE          (ESP_ERR_NVS_BASE + 0x07)  /*!< Handle has been closed or is NULL */
#define ESP_ERR_NVS_REMOVE_FAILED           (ESP_ERR_NVS_BASE + 0x08)  /*!< The value wasn’t updated because flash write operation has failed. The value was written however, and update will be finished after re-initialization of nvs, provided that flash operation doesn’t fail again. */
#define ESP_ERR_NVS_KEY_TOO_LONG            (ESP_ERR_NVS_BASE + 0x09)  /*!< Key name is too long */
#define ESP_ERR_NVS_PAGE_FULL               (ESP_ERR_NVS_BASE + 0x0a)  /*!< Internal error; never returned by nvs API functions */
#define ESP_ERR_NVS_INVALID_STATE           (ESP_ERR_NVS_BASE + 0x0b)  /*!< NVS is in an inconsistent state due to a previous error. Call nvs_flash_init and nvs_open again, then retry. */
#define ESP_ERR_NVS_INVALID_LENGTH          (ESP_ERR_NVS_BASE + 0x0c)  /*!< String or blob length is not sufficient to store data */
#define ESP_ERR_NVS_NO_FREE_PAGES           (ESP_ERR_NVS_BASE + 0x0d)  /*!< NVS partition doesn't contain any empty pages. This may happen if NVS partition was truncated. Erase the whole partition and call nvs_flash_init again. */
#define ESP_ERR_NVS_VALUE_TOO_LONG          (ESP_ERR_NVS_BASE + 0x0e)  /*!< Value doesn't fit into the entry or string or blob length is longer than supported by the implementation */
#define ESP_ERR_NVS_PART_NOT_FOUND          (ESP_ERR_NVS_BASE + 0x0f)  /*!< Partition with specified name is not found in the partition table */#define ESP_ERR_NVS_NEW_VERSION_FOUND       (ESP_ERR_NVS_BASE + 0x10)  /*!< NVS partition contains data in new format and cannot be recognized by this version of code */
#define ESP_ERR_NVS_XTS_ENCR_FAILED         (ESP_ERR_NVS_BASE + 0x11)  /*!< XTS encryption failed while writing NVS entry */
#define ESP_ERR_NVS_XTS_DECR_FAILED         (ESP_ERR_NVS_BASE + 0x12)  /*!< XTS decryption failed while reading NVS entry */
#define ESP_ERR_NVS_XTS_CFG_FAILED          (ESP_ERR_NVS_BASE + 0x13)  /*!< XTS configuration setting failed */
#define ESP_ERR_NVS_XTS_CFG_NOT_FOUND       (ESP_ERR_NVS_BASE + 0x14)  /*!< XTS configuration not found */
#define ESP_ERR_NVS_ENCR_NOT_SUPPORTED      (ESP_ERR_NVS_BASE + 0x15)  /*!< NVS encryption is not supported in this version */
#define ESP_ERR_NVS_KEYS_NOT_INITIALIZED    (ESP_ERR_NVS_BASE + 0x16)  /*!< NVS key partition is uninitialized */
#define ESP_ERR_NVS_CORRUPT_KEY_PART        (ESP_ERR_NVS_BASE + 0x17)  /*!< NVS key partition is corrupt */
#define ESP_ERR_NVS_WRONG_ENCRYPTION        (ESP_ERR_NVS_BASE + 0x19)  /*!< NVS partition is marked as encrypted with generic flash encryption. This is forbidden since the NVS encryption works differently. */#define ESP_ERR_NVS_CONTENT_DIFFERS         (ESP_ERR_NVS_BASE + 0x18)  /*!< Internal error; never returned by nvs API functions.  NVS key is different in comparison */#define NVS_DEFAULT_PART_NAME               "nvs"   /*!< Default partition name of the NVS partition in the partition table */#define NVS_PART_NAME_MAX_SIZE              16   /*!< maximum length of partition name (excluding null terminator) */
#define NVS_KEY_NAME_MAX_SIZE               16   /*!< Maximum length of NVS key name (including null terminator) */
#define NVS_NS_NAME_MAX_SIZE                NVS_KEY_NAME_MAX_SIZE /*!< Maximum length of NVS namespace name (including null terminator) */