implement reset via back button

Signed-off-by: Peter Siegmund <developer@mars3142.org>

firmware/components/connectivity-manager/src/wifi_manager.c

@@ -29,6 +29,31 @@ static EventGroupHandle_t s_wifi_event_group;
 
 static const char *TAG = "wifi_manager";
 
+static void wifi_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_LOGI(TAG, "WIFI_EVENT_STA_START: Connecting to AP...");
+        esp_wifi_connect();
+    }
+    else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
+    {
+        ESP_LOGW(TAG, "WIFI_EVENT_STA_DISCONNECTED: Verbindung verloren, versuche erneut...");
+        xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+    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, "IP_EVENT_STA_GOT_IP: IP-Adresse erhalten: " IPSTR, IP2STR(&event->ip_info.ip));
+        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+    }
+    else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_LOST_IP)
+    {
+        ESP_LOGW(TAG, "IP_EVENT_STA_LOST_IP: IP-Adresse verloren!");
+        xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+}
+
 static void wifi_create_ap()
 {
     ESP_ERROR_CHECK(esp_wifi_stop());
@@ -58,6 +83,13 @@ void wifi_manager_init()
     ESP_ERROR_CHECK(esp_netif_init());
     ESP_ERROR_CHECK(esp_event_loop_create_default());
 
+    // Default WiFi Station
+    esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
+
+    // Event Handler registrieren
+    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL, NULL));
+    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL, NULL));
+
     // Try to load stored WiFi configuration
     persistence_manager_t pm;
     char ssid[33] = {0};
@@ -97,9 +129,9 @@ void wifi_manager_init()
         EventBits_t bits;
         do
         {
-            esp_wifi_connect();
+            ESP_LOGI(TAG, "Warte auf IP-Adresse (DHCP)...");
             bits = xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, pdFALSE, pdFALSE,
-                                       5000 / portTICK_PERIOD_MS);
+                                       10000 / portTICK_PERIOD_MS);
             if (bits & WIFI_CONNECTED_BIT)
             {
                 led_behavior_t led_behavior = {
@@ -108,7 +140,7 @@ void wifi_manager_init()
                     .mode = LED_MODE_SOLID,
                 };
                 led_status_set_behavior(led_behavior);
-                ESP_LOGI(TAG, "WiFi connection established successfully");
+                ESP_LOGI(TAG, "WiFi connection established successfully (mit IP)");
                 break;
             }
             retries++;
@@ -116,7 +148,9 @@ void wifi_manager_init()
 
         if (!(bits & WIFI_CONNECTED_BIT))
         {
-            ESP_LOGW(TAG, "WiFi connection failed, switching to Access Point mode");
+            ESP_LOGW(TAG, "WiFi connection failed (keine IP?), switching to Access Point mode");
+            // AP-Netzwerkschnittstelle initialisieren, falls noch nicht geschehen
+            esp_netif_create_default_wifi_ap();
             wifi_create_ap();
         }
     }

firmware/components/persistence-manager/include/persistence_manager.h

@@ -28,6 +28,15 @@ extern "C"
         bool initialized;
     } persistence_manager_t;
 
+    /**
+     * @brief Erases the entire NVS flash (factory reset).
+     *
+     * Warning: This will remove all stored data and namespaces!
+     *
+     * @return esp_err_t ESP_OK on success, otherwise error code.
+     */
+    esp_err_t persistence_manager_factory_reset(void);
+
     /**
      * @brief Initialize the persistence manager with a given NVS namespace.
      *

firmware/components/persistence-manager/src/persistence_manager.c

@@ -1,9 +1,21 @@
+
 #include "persistence_manager.h"
 #include <esp_log.h>
 #include <string.h>
 
 #define TAG "persistence_manager"
 
+esp_err_t persistence_manager_factory_reset(void)
+{
+    // Erase the entire NVS flash (factory reset)
+    esp_err_t err = nvs_flash_erase();
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Factory reset failed: %s", esp_err_to_name(err));
+    }
+    return err;
+}
+
 esp_err_t persistence_manager_init(persistence_manager_t *pm, const char *nvs_namespace)
 {
     if (!pm)

firmware/main/app_task.cpp

@@ -2,6 +2,7 @@
 
 #include "analytics.h"
 #include "button_handling.h"
+#include "common.h"
 #include "common/InactivityTracker.h"
 #include "hal/u8g2_esp32_hal.h"
 #include "i2c_checker.h"
@@ -182,7 +183,55 @@ void app_task(void *args)
         return;
     }
 
+    // Display initialisieren, damit Info angezeigt werden kann
     setup_screen();
+
+    // BACK-Button prüfen und ggf. Einstellungen löschen (mit Countdown)
+    gpio_config_t io_conf = {};
+    io_conf.intr_type = GPIO_INTR_DISABLE;
+    io_conf.mode = GPIO_MODE_INPUT;
+    io_conf.pin_bit_mask = (1ULL << BUTTON_BACK);
+    io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
+    io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
+    gpio_config(&io_conf);
+
+    vTaskDelay(pdMS_TO_TICKS(10));
+    if (gpio_get_level(BUTTON_BACK) == 0)
+    {
+        u8g2_SetFont(&u8g2, u8g2_font_ncenB08_tr);
+        for (int i = 5; i > 0; --i)
+        {
+            u8g2_ClearBuffer(&u8g2);
+            u8g2_DrawStr(&u8g2, 5, 20, "BACK gedrueckt!");
+            u8g2_DrawStr(&u8g2, 5, 35, "Halte fuer Reset...");
+            char buf[32];
+            snprintf(buf, sizeof(buf), "Loesche in %d s", i);
+            u8g2_DrawStr(&u8g2, 5, 55, buf);
+            u8g2_SendBuffer(&u8g2);
+            vTaskDelay(pdMS_TO_TICKS(1000));
+            if (gpio_get_level(BUTTON_BACK) != 0)
+            {
+                // Button losgelassen, abbrechen
+                break;
+            }
+            if (i == 1)
+            {
+                // After 5 seconds still pressed: perform factory reset
+                u8g2_ClearBuffer(&u8g2);
+                u8g2_DrawStr(&u8g2, 5, 30, "Alle Einstellungen ");
+                u8g2_DrawStr(&u8g2, 5, 45, "werden geloescht...");
+                u8g2_SendBuffer(&u8g2);
+                persistence_manager_factory_reset();
+                vTaskDelay(pdMS_TO_TICKS(1000));
+                u8g2_ClearBuffer(&u8g2);
+                u8g2_DrawStr(&u8g2, 5, 35, "Fertig. Neustart...");
+                u8g2_SendBuffer(&u8g2);
+                vTaskDelay(pdMS_TO_TICKS(1000));
+                esp_restart();
+            }
+        }
+    }
+
     setup_buttons();
     init_ui();