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authorEric Dao <eric@erickhangdao.com>2022-07-09 22:38:28 -0400
committerEric Dao <eric@erickhangdao.com>2022-07-09 22:38:28 -0400
commitcb234a53f606de8bd136b596a316e912ddf15185 (patch)
treec5f4bf00e4e7e038c24f4ff79f3c5f7af9474ca9 /software/main/wifi.c
parent9dd37009b3dc7d4d155f5c1a529ace46e55c8e0d (diff)
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added licenseHEADmaster
Diffstat (limited to 'software/main/wifi.c')
-rw-r--r--software/main/wifi.c94
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