ESP_ERR_NVS_INVALID_NAME:命名空间名称不满足约束 ESP_ERR_NO_MEM:无法为内部结构分配内存的情况 ESP_ERR_NVS_NOT_ENOUGH_SPACE:如果没有空间容纳新条目或有太多不同的命名空间(允许的不同命名空间的最大值:254) (4) 示例 printf("Opening Non-Volatile Storage (NVS) handle... ");nvs_handlemy_handle;...
Re: ESP_ERR_NVS_INVALID_LENGTH PostbyGeorgesLab»Tue Jan 08, 2019 12:13 pm Code:Select all uint32_tnvs_read_str(constchar* key,char* value) {esp_err_terr;size_trequired_size;// Opennvs_handle my_handle; err = nvs_open("storage", NVS_READWRITE, &my_handle);if(err != ESP_...
如果句柄已关闭或为NULL,则为ESP_ERR_NVS_INVALID_HANDLE ESP_ERR_NVS_READ_ONLY如果存储句柄被打开为只读 如果键名不满足约束,则为ESP_ERR_NVS_INVALID_NAME ESP_ERR_NVS_NOT_ENOUGH_SPACE,如果基础存储中没有足够的空间来保存该值 ESP_ERR_NVS_REMOVE_FAILED如果由于闪存写入操作失败而未更新该值。但是,已写入...
* - ESP_ERR_NVS_NOT_INITIALIZED if the storage driver is not initialized * - ESP_ERR_NVS_PART_NOT_FOUND if the partition with specified name is not found * - ESP_ERR_NVS_NOT_FOUND id namespace doesn't exist yet and * mode is NVS_READONLY * - ESP_ERR_NVS_INVALID_NAME if namesp...
版本V5.0.1,我利用了NVS保存了WiFI的密码和账号,但是我发现经常读不成功地。我看了一下例程,我发现例程只是读某一个BYTE的数据,nvs_get_u8 例如这个读BYTE的接口,是正确的。多次读写都容易成功。但是利用 nvs_get_str 这个读字符串,经常读不出来的,会经常报一个错误 (ESP_ERR_NVS_INVALID_LENGTH)。但是...
nvs是在Flash中存储键值对数据,适合存储小规模的数据,不适合存储大的数据。 写键值对时,key 的最大长度为154个字符, 值支持常用的数据类型, 如: uint8_t int8_t uint16_t int16_t uint32_t int32_t uint64_t int64_t 字符串(以\0结尾)
esp_err_t ret = nvs_flash_init(); printf("one"); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); ret = nvs_flash_init(); printf("no free pages in nvs"); } for(int i=0;i<sizeof(wifi_con.ssid)...
https://jsonplaceholder.typicode.com/posts/1"void app_main(){ ESP_LOGE(TAG, "app_main"); // 初始化NVS存储区 esp_err_t ret = nvs_flash_init(); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase(...
Espressif IoT Development Framework. Official development framework for Espressif SoCs. - esp-idf/components/nvs_flash/include/nvs_handle.hpp at dc016f59877d13e6e7d4fc193aa5aa764547f16d · espressif/esp-idf
It uses passed length to check whether buffer size is enough or not. ('length' parameter is bi-directional when buffer pointer other than null is given.) Passing zero here means it always fails with ESP_ERR_NVS_INVALID_LENGTH. https://github.com/espressif/esp-idf/blob/9f3b550ff4df63d078...