add wifi

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "main.c" "font.c" "display.c" "text.c"
+idf_component_register(SRCS "main.c" "font.c" "display.c" "text.c" "wlan.c"
                     INCLUDE_DIRS "")

main/Kconfig.projbuild

@@ -0,0 +1,67 @@
+menu "WiFi Credentials"
+
+    config ESP_WIFI_SSID
+        string "WiFi SSID"
+        default "myssid"
+        help
+            SSID (network name) for the example to connect to.
+
+    config ESP_WIFI_PASSWORD
+        string "WiFi Password"
+        default "mypassword"
+        help
+            WiFi password (WPA or WPA2) for the example to use.
+
+    choice ESP_WIFI_SAE_MODE
+        prompt "WPA3 SAE mode selection"
+        default ESP_WPA3_SAE_PWE_BOTH
+        help
+            Select mode for SAE as Hunt and Peck, H2E or both.
+        config ESP_WPA3_SAE_PWE_HUNT_AND_PECK
+            bool "HUNT AND PECK"
+        config ESP_WPA3_SAE_PWE_HASH_TO_ELEMENT
+            bool "H2E"
+        config ESP_WPA3_SAE_PWE_BOTH
+            bool "BOTH"
+    endchoice
+
+    config ESP_WIFI_PW_ID
+        string "PASSWORD IDENTIFIER"
+        depends on  ESP_WPA3_SAE_PWE_HASH_TO_ELEMENT|| ESP_WPA3_SAE_PWE_BOTH
+        default ""
+        help
+            password identifier for SAE H2E
+
+    config ESP_MAXIMUM_RETRY
+        int "Maximum retry"
+        default 5
+        help
+            Set the Maximum retry to avoid station reconnecting to the AP unlimited when the AP is really inexistent.
+
+    choice ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD
+        prompt "WiFi Scan auth mode threshold"
+        default ESP_WIFI_AUTH_WPA2_PSK
+        help
+            The weakest authmode to accept in the scan mode.
+            This value defaults to ESP_WIFI_AUTH_WPA2_PSK incase password is present and ESP_WIFI_AUTH_OPEN is used.
+            Please select ESP_WIFI_AUTH_WEP/ESP_WIFI_AUTH_WPA_PSK incase AP is operating in WEP/WPA mode.
+
+        config ESP_WIFI_AUTH_OPEN
+            bool "OPEN"
+        config ESP_WIFI_AUTH_WEP
+            bool "WEP"
+        config ESP_WIFI_AUTH_WPA_PSK
+            bool "WPA PSK"
+        config ESP_WIFI_AUTH_WPA2_PSK
+            bool "WPA2 PSK"
+        config ESP_WIFI_AUTH_WPA_WPA2_PSK
+            bool "WPA/WPA2 PSK"
+        config ESP_WIFI_AUTH_WPA3_PSK
+            bool "WPA3 PSK"
+        config ESP_WIFI_AUTH_WPA2_WPA3_PSK
+            bool "WPA2/WPA3 PSK"
+        config ESP_WIFI_AUTH_WAPI_PSK
+            bool "WAPI PSK"
+    endchoice
+
+endmenu

main/main.c

@@ -11,10 +11,12 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_system.h"
+#include "nvs_flash.h"
 #include "esp_timer.h"
 
 #include "display.h"
 #include "text.h"
+#include "wlan.h"
 
 #ifdef CONFIG_IDF_TARGET_ESP32
 #define CHIP_NAME "ESP32"
@@ -26,8 +28,6 @@
 
 const esp_timer_create_args_t periodic_timer_args = {
     .callback = &display_cycle,
-    /* name is optional, but may help identify the timer when debugging */
-    .name = "display"
 };
 
 void app_main(void)
@@ -39,7 +39,19 @@ void app_main(void)
     ESP_ERROR_CHECK(esp_timer_create(&periodic_timer_args, &periodic_timer));
     ESP_ERROR_CHECK(esp_timer_start_periodic(periodic_timer, 500));
 
-    put_line(fb, 2, "429 Amalienplatz", 1, 1);
+    put_line(fb, 1, "MauMau", 1, 1);
+
+    //Initialize WiFi
+    esp_err_t ret = nvs_flash_init();
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+        ESP_ERROR_CHECK(nvs_flash_erase());
+        ret = nvs_flash_init();
+    }
+    ESP_ERROR_CHECK(ret);
+    wifi_init_sta();
+
+    put_line(fb, 2, "wifi", 1, 1);
+
     for (;;) {
         vTaskDelay(1);
     }

main/wlan.c

@@ -0,0 +1,105 @@
+#include "sdkconfig.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "esp_event.h"
+#include "esp_log.h"
+
+static const char *TAG = "wifi station";
+
+/* The event group allows multiple bits for each event, but we only care about two events:
+ * - we are connected to the AP with an IP
+ * - we failed to connect after the maximum amount of retries */
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT      BIT1
+
+/* FreeRTOS event group to signal when we are connected*/
+static EventGroupHandle_t s_wifi_event_group;
+static int s_retry_num = 0;
+static 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 < CONFIG_ESP_MAXIMUM_RETRY) {
+            esp_wifi_connect();
+            s_retry_num++;
+            ESP_LOGI(TAG, "retry to connect to the AP");
+        } else {
+            xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+        }
+        ESP_LOGI(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(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
+        s_retry_num = 0;
+        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+    }
+}
+
+void wifi_init_sta(void)
+{
+    s_wifi_event_group = xEventGroupCreate();
+
+    ESP_ERROR_CHECK(esp_netif_init());
+
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+    esp_netif_create_default_wifi_sta();
+
+    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+    ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+
+    esp_event_handler_instance_t instance_any_id;
+    esp_event_handler_instance_t instance_got_ip;
+    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
+                                                        ESP_EVENT_ANY_ID,
+                                                        &event_handler,
+                                                        NULL,
+                                                        &instance_any_id));
+    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
+                                                        IP_EVENT_STA_GOT_IP,
+                                                        &event_handler,
+                                                        NULL,
+                                                        &instance_got_ip));
+
+    wifi_config_t wifi_config = {
+        .sta = {
+            .ssid = CONFIG_ESP_WIFI_SSID,
+            .password = CONFIG_ESP_WIFI_PASSWORD,
+            ///* Authmode threshold resets to WPA2 as default if password matches WPA2 standards (pasword len => 8).
+            // * If you want to connect the device to deprecated WEP/WPA networks, Please set the threshold value
+            // * to WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK and set the password with length and format matching to
+            // * WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK standards.
+            // */
+            //.threshold.authmode = ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD,
+            //.sae_pwe_h2e = ESP_WIFI_SAE_MODE,
+            //.sae_h2e_identifier = EXAMPLE_H2E_IDENTIFIER,
+        },
+    };
+    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
+    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
+    ESP_ERROR_CHECK(esp_wifi_start() );
+
+    ESP_LOGI(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(TAG, "connected to ap SSID:%s password:%s",
+                 CONFIG_ESP_WIFI_SSID, CONFIG_ESP_WIFI_PASSWORD);
+    } else if (bits & WIFI_FAIL_BIT) {
+        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
+                 CONFIG_ESP_WIFI_SSID, CONFIG_ESP_WIFI_PASSWORD);
+    } else {
+        ESP_LOGE(TAG, "UNEXPECTED EVENT");
+    }
+}
+

main/wlan.h

@@ -0,0 +1 @@
+void wifi_init_sta(void);