added licenseHEADmaster

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);
+}
\ No newline at end of file