mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
1df85e0039
This change adds a check for compatibility between the nvs version found on nvs flash and the one assumed by running code during nvs initialization. Any mismatch is reported to the user using new error code ESP_ERR_NVS_NEW_VERSION_FOUND.
128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/* Scan Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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/*
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This example shows how to use the All Channel Scan or Fast Scan to connect
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to a Wi-Fi network.
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In the Fast Scan mode, the scan will stop as soon as the first network matching
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the SSID is found. In this mode, an application can set threshold for the
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authentication mode and the Signal strength. Networks that do not meet the
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threshold requirements will be ignored.
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In the All Channel Scan mode, the scan will end only after all the channels
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are scanned, and connection will start with the best network. The networks
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can be sorted based on Authentication Mode or Signal Strength. The priority
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for the Authentication mode is: WPA2 > WPA > WEP > Open
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*/
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#include "freertos/FreeRTOS.h"
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#include "freertos/event_groups.h"
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#include "esp_wifi.h"
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#include "esp_log.h"
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#include "esp_event_loop.h"
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#include "nvs_flash.h"
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/*Set the SSID and Password via "make menuconfig"*/
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#define DEFAULT_SSID CONFIG_WIFI_SSID
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#define DEFAULT_PWD CONFIG_WIFI_PASSWORD
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#if CONFIG_WIFI_ALL_CHANNEL_SCAN
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#define DEFAULT_SCAN_METHOD WIFI_ALL_CHANNEL_SCAN
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#elif CONFIG_WIFI_FAST_SCAN
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#define DEFAULT_SCAN_METHOD WIFI_FAST_SCAN
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#else
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#define DEFAULT_SCAN_METHOD WIFI_FAST_SCAN
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#endif /*CONFIG_SCAN_METHOD*/
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#if CONFIG_WIFI_CONNECT_AP_BY_SIGNAL
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#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SIGNAL
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#elif CONFIG_WIFI_CONNECT_AP_BY_SECURITY
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#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SECURITY
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#else
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#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SIGNAL
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#endif /*CONFIG_SORT_METHOD*/
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#if CONFIG_FAST_SCAN_THRESHOLD
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#define DEFAULT_RSSI CONFIG_FAST_SCAN_MINIMUM_SIGNAL
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#if CONFIG_EXAMPLE_OPEN
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#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
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#elif CONFIG_EXAMPLE_WEP
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#define DEFAULT_AUTHMODE WIFI_AUTH_WEP
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#elif CONFIG_EXAMPLE_WPA
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#define DEFAULT_AUTHMODE WIFI_AUTH_WPA_PSK
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#elif CONFIG_EXAMPLE_WPA2
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#define DEFAULT_AUTHMODE WIFI_AUTH_WPA2_PSK
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#else
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#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
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#endif
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#else
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#define DEFAULT_RSSI -127
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#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
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#endif /*CONFIG_FAST_SCAN_THRESHOLD*/
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static const char *TAG = "scan";
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static esp_err_t event_handler(void *ctx, system_event_t *event)
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{
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switch (event->event_id) {
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case SYSTEM_EVENT_STA_START:
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ESP_LOGI(TAG, "SYSTEM_EVENT_STA_START");
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ESP_ERROR_CHECK(esp_wifi_connect());
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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ESP_LOGI(TAG, "SYSTEM_EVENT_STA_GOT_IP");
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ESP_LOGI(TAG, "Got IP: %s\n",
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ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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ESP_LOGI(TAG, "SYSTEM_EVENT_STA_DISCONNECTED");
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ESP_ERROR_CHECK(esp_wifi_connect());
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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/* Initialize Wi-Fi as sta and set scan method */
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static void wifi_scan(void)
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{
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tcpip_adapter_init();
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ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = DEFAULT_SSID,
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.password = DEFAULT_PWD,
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.scan_method = DEFAULT_SCAN_METHOD,
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.sort_method = DEFAULT_SORT_METHOD,
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.threshold.rssi = DEFAULT_RSSI,
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.threshold.authmode = DEFAULT_AUTHMODE,
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},
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};
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
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ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
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ESP_ERROR_CHECK(esp_wifi_start());
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}
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void app_main()
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{
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// Initialize NVS
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK( ret );
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wifi_scan();
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}
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