diff options
Diffstat (limited to 'software/main/wifi.c')
| -rw-r--r-- | software/main/wifi.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/software/main/wifi.c b/software/main/wifi.c new file mode 100644 index 0000000..f319257 --- /dev/null +++ b/software/main/wifi.c @@ -0,0 +1,94 @@ +#include <string.h> +#include "freertos/FreeRTOS.h" +#include "freertos/task.h" +#include "freertos/event_groups.h" +#include "esp_system.h" +#include "esp_wifi.h" +#include "esp_event.h" +#include "esp_log.h" +#include "nvs_flash.h" + +#include "lwip/err.h" +#include "lwip/sys.h" + +#include "../include/wifi.h" + +void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) { + if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) { + esp_wifi_connect(); + } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) { + if (s_retry_num < ESP_MAXIMUM_RETRY) { + esp_wifi_connect(); + s_retry_num++; + ESP_LOGI(WIFI_TAG, "retry to connect to the AP"); + } else { + xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT); + } + ESP_LOGI(WIFI_TAG,"connect to the AP fail"); + } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) { + ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data; + ESP_LOGI(WIFI_TAG, "got ip:%s", + ip4addr_ntoa(&event->ip_info.ip)); + s_retry_num = 0; + xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT); + } +} + +void wifi_init_sta() { + s_wifi_event_group = xEventGroupCreate(); + + tcpip_adapter_init(); + + ESP_ERROR_CHECK(esp_event_loop_create_default()); + + wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); + ESP_ERROR_CHECK(esp_wifi_init(&cfg)); + + ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL)); + ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL)); + + wifi_config_t wifi_config = { + .sta = { + .ssid = ESP_WIFI_SSID, + .password = ESP_WIFI_PASS, + /* Setting a password implies station will connect to all security modes including WEP/WPA. + * However these modes are deprecated and not advisable to be used. Incase your Access point + * doesn't support WPA2, these mode can be enabled by commenting below line */ + .threshold.authmode = WIFI_AUTH_WPA2_PSK, + + .pmf_cfg = { + .capable = true, + .required = false + }, + }, + }; + ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) ); + ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) ); + ESP_ERROR_CHECK(esp_wifi_start() ); + + ESP_LOGI(WIFI_TAG, "wifi_init_sta finished."); + + /* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum + * number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */ + EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, + WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, + pdFALSE, + pdFALSE, + portMAX_DELAY); + + /* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually + * happened. */ + if (bits & WIFI_CONNECTED_BIT) { + ESP_LOGI(WIFI_TAG, "connected to ap SSID:%s password:%s", + ESP_WIFI_SSID, ESP_WIFI_PASS); + } else if (bits & WIFI_FAIL_BIT) { + ESP_LOGI(WIFI_TAG, "Failed to connect to SSID:%s, password:%s", + ESP_WIFI_SSID, ESP_WIFI_PASS); + } else { + ESP_LOGE(WIFI_TAG, "UNEXPECTED EVENT"); + } + + ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler)); + ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler)); + vEventGroupDelete(s_wifi_event_group); +}
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