ESP32 Forum

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[Codebox=c file=Untitled.c]void set_nvs_string(char* data, char* key)
{
	nvs_handle my_handle;
	esp_err_t err = nvs_open("storage", NVS_READWRITE, &my_handle);
	if (err != ESP_OK) {
		printf("Error (%s) opening NVS handle!\n", esp_err_to_name(err));
	}				
	err = nvs_set_str(my_handle, key, data);
	printf((err != ESP_OK) ? "Failed! Setting String from NVS\n" : "Done Setting String from NVS\n");
	printf("Committing updates in NVS ... ");
	err = nvs_commit(my_handle);
	printf((err != ESP_OK) ? "Failed! Commiting\n" : "Done Commiting\n");
}

esp_err_t get_nvs_string(char* key, char* data)
{
	nvs_handle my_handle;
	esp_err_t err = nvs_open("storage", NVS_READWRITE, &my_handle);
	if (err != ESP_OK) {
		printf("Error (%s) opening NVS handle!\n", esp_err_to_name(err));
	}
	size_t size = strlen(data);
	err = nvs_get_str(my_handle, key, data, &size);
	switch (err) 
	{
	case ESP_OK:
		printf("Done Getting String from NVS\n");
		break;
	case ESP_ERR_NVS_NOT_FOUND:
		printf("The value is not initialized yet!\n");
		break;
	default :
		printf("Error (%s) reading!\n", esp_err_to_name(err));
	}
	return err;
}

ESP_LOGI(TAG_ap, "SSID Local: %s  PASSWORD Local: %s Inverter ID %s", ssidLocal, passwordLocal, InverterId);
	set_nvs_string(InverterId, "InverterId");
	
	
	if (strlen(ssidLocal) != 0 && strlen(passwordLocal) != 0)
	{

		set_nvs_string(ssidLocal, "ssid");
		set_nvs_string(passwordLocal, "password");
		wifi_config_t wifi_config;
		
		
		char* tempSsid = malloc(sizeof(char) * 32);
		char* tempPassword = malloc(sizeof(char) * 64);
	
	
		get_nvs_string("ssid", tempSsid);
		get_nvs_string("password", tempPassword);
	
	
		strcpy((char*)wifi_config.sta.ssid, tempSsid); 
		strcpy((char*)wifi_config.sta.password, tempPassword);

		ESP_LOGI("WIFI CHECK4", "Set SSID: %s", (char*)wifi_config.sta.ssid);
		ESP_LOGI("WIFI CHECK4", "Set Password: %s", (char*)wifi_config.sta.password);
	
		free(tempSsid);
		free(tempPassword);
			
		ESP_LOGI(TAG_ap, "=========== PARSED DATA ==========");
		ESP_LOGI(TAG_ap, "SSID: %s  PASSWORD: %s", wifi_config.sta.ssid, wifi_config.sta.password);
		ESP_LOGI(TAG_ap, "====================================");
		ESP_ERROR_CHECK(esp_wifi_stop());
		wifi_init_sta();
			
		
		s_retry_num = 0;
	}[/Codebox]

Code: Untitled.txt Select all

I (146517) Hojaa Pls: SSID Local: ZongAltium1  PASSWORD Local: Xavor123 Inverter ID Schneider

Done Setting String from NVS

Committing updates in NVS ... Done Commiting

Done Setting String from NVS

Committing updates in NVS ... Done Commiting

Done Setting String from NVS

Committing updates in NVS ... Done Commiting

Done Getting String from NVS

Error (ESP_ERR_NVS_INVALID_LENGTH) reading!

I (146557) wifi: station: 9e:62:e3:2e:66:f5 leave, AID = 1, bss_flags is 134243

I (146567) WIFI CHECK4: Set SSID: ZongAltium1

I (146567) wifi: n:1 0, o:1 0, ap:1 1, sta:0 0, prof:1

I (146567) WIFI CHECK4: Set Password: ???

I (146577) Hojaa Pls: =========== PARSED DATA ==========

I (146587) Hojaa Pls: SSID: ZongAltium1  PASSWORD: ???

I (146587) Hojaa Pls: ====================================

I (146637) wifi: flush txq

I (146637) wifi: stop sw txq

I (146637) wifi: lmac stop hw txq

Error (ESP_ERR_NVS_INVALID_LENGTH) reading!

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size_t size = strlen(data)+1;

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	size_t size = strlen(data);
	err = nvs_get_str(my_handle, key, data, &size);

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// 1. add "out_data_size" argument to tell this function how much space is available in "out_data".
// 2. Also make "key" const, since it is not modified by this function.
esp_err_t get_nvs_string(const char* key, char* data, size_t data_size)
{
	nvs_handle my_handle;
	esp_err_t err = nvs_open("storage", NVS_READWRITE, &my_handle);
	if (err != ESP_OK) {
		printf("Error (%s) opening NVS handle!\n", esp_err_to_name(err));
	}
	// 3. as input, "size" should contain the amount of space available
	size_t size = out_data_size;
	err = nvs_get_str(my_handle, key, data, &size);
	// 4. after this call, if err == ESP_OK, "size" will contain the number of bytes written into "data"
...

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char value[32];
err = get_nvs_string("some_key", value, sizeof(value));