add BLE bonding

Signed-off-by: Peter Siegmund <mars3142@users.noreply.github.com>

firmware/components/light/light.c

@@ -14,7 +14,11 @@ esp_err_t wled_init(void)
     led_strip_config_t strip_config = {.strip_gpio_num = CONFIG_WLED_DIN_PIN,
                                        .max_leds = led_matrix.size,
                                        .led_model = LED_MODEL_WS2812,
-                                       .color_component_format = LED_STRIP_COLOR_COMPONENT_FMT_GRB,
+#if CONFIG_WLED_WITH_WHITE
+                                       .color_component_format = LED_STRIP_COLOR_COMPONENT_FMT_GRBW,
+#else
+                                       .color_component_format = LED_STRIP_COLOR_COMPONENT_FMT_RGB,
+#endif
                                        .flags = {
                                            .invert_out = false,
                                        }};

firmware/components/light/outdoor.c

@@ -7,26 +7,21 @@
 
 static const char *TAG = "outdoor";
 
-// Timer resolution (10 bit = 1024 steps)
+#define LEDC_RESOLUTION LEDC_TIMER_10_BIT // Timer resolution (10 bit = 1024 steps)
-#define LEDC_RESOLUTION LEDC_TIMER_10_BIT
 #define MAX_DUTY 1023
 
-// Constant brightness for the "normal state" (approx. 90%)
+#define NORMAL_DUTY (MAX_DUTY * 0.9) // 90% brightness
-#define NORMAL_DUTY (MAX_DUTY * 0.9)
 
-// Parameters for flickering
+#define FLICKER_CHANCE 2 // 2% chance of flickering per cycle
-#define FLICKER_CHANCE 5 // 5% chance of flickering per cycle
 #define FLICKER_COUNT 8  // Number of brightness changes during a flicker
 
 TaskHandle_t outdoor_task_handle = NULL;
 
 void outdoor_task(void *pvParameters)
 {
-    ESP_LOGI(TAG, "Simulation of a defective light bulb started.");
 
     int led_pin = *(int *)pvParameters;
 
-    // 1. LEDC timer configuration
     ledc_timer_config_t ledc_timer = {.speed_mode = LEDC_LOW_SPEED_MODE,
                                       .timer_num = LEDC_TIMER_0,
                                       .duty_resolution = LEDC_RESOLUTION,
@@ -34,7 +29,6 @@ void outdoor_task(void *pvParameters)
                                       .clk_cfg = LEDC_AUTO_CLK};
     ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));
 
-    // 2. LEDC channel configuration
     ledc_channel_config_t ledc_channel = {.speed_mode = LEDC_LOW_SPEED_MODE,
                                           .channel = LEDC_CHANNEL_0,
                                           .timer_sel = LEDC_TIMER_0,
@@ -44,40 +38,38 @@ void outdoor_task(void *pvParameters)
                                           .hpoint = 0};
     ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
 
-    // 3. Main loop with flicker logic
     while (1)
     {
-        // First, set the LED to its normal brightness
         ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, NORMAL_DUTY);
         ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
 
-        // Random trigger for flickering
+        uint32_t random_val = esp_random() % 100;
-        uint32_t random_val = esp_random() % 100; // Random number between 0 and 99
 
         if (random_val < FLICKER_CHANCE)
         {
-            // Start flicker sequence
             for (int i = 0; i < FLICKER_COUNT; i++)
             {
-                // Set a random, lower brightness (e.g., 30-70% of normal brightness)
                 uint32_t flicker_duty = (NORMAL_DUTY * 0.3) + (esp_random() % (uint32_t)(NORMAL_DUTY * 0.4));
                 ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, flicker_duty);
                 ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
 
-                // Short, random delay for irregular flickering
                 vTaskDelay(pdMS_TO_TICKS(20 + (esp_random() % 50)));
             }
         }
 
-        // A fixed delay in normal operation
         vTaskDelay(pdMS_TO_TICKS(100));
     }
 }
 
 esp_err_t outdoor_start(void)
 {
-    static const int led_pin = 13;
+    ESP_LOGI(TAG, "Simulation of a defective light bulb started.");
-    xTaskCreate(outdoor_task, "outdoor_task", 2048, (void *)&led_pin, 5, &outdoor_task_handle);
+
+    static const int led_left_pin = CONFIG_LED_PIN_LEFT;
+    xTaskCreate(outdoor_task, "outdoor_task_left", 2048, (void *)&led_left_pin, 5, &outdoor_task_handle);
+
+    static const int led_right_pin = CONFIG_LED_PIN_RIGHT;
+    xTaskCreate(outdoor_task, "outdoor_task_right", 2048, (void *)&led_right_pin, 5, &outdoor_task_handle);
 
     return ESP_OK;
 }

firmware/components/persistence/include/persistence.h

@@ -3,6 +3,7 @@
 typedef enum
 {
     VALUE_TYPE_STRING,
+    VALUE_TYPE_INT8,
     VALUE_TYPE_INT32,
 } persistence_value_type_t;
 

firmware/components/persistence/persistence.c

@@ -10,6 +10,149 @@ static const char *TAG = "persistence";
 static nvs_handle_t persistence_handle;
 static SemaphoreHandle_t persistence_mutex;
 
+#include "esp_log.h"
+#include "nvs.h"
+#include "nvs_flash.h"
+
+static const char *nvs_type_to_str(nvs_type_t type)
+{
+    switch (type)
+    {
+    case NVS_TYPE_U8:
+        return "U8";
+    case NVS_TYPE_I8:
+        return "I8";
+    case NVS_TYPE_U16:
+        return "U16";
+    case NVS_TYPE_I16:
+        return "I16";
+    case NVS_TYPE_U32:
+        return "U32";
+    case NVS_TYPE_I32:
+        return "I32";
+    case NVS_TYPE_U64:
+        return "U64";
+    case NVS_TYPE_I64:
+        return "I64";
+    case NVS_TYPE_STR:
+        return "STR";
+    case NVS_TYPE_BLOB:
+        return "BLOB";
+    case NVS_TYPE_ANY:
+        return "ANY";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+void display_nvs_value(const char *namespace_name, const char *key, nvs_type_t type)
+{
+    nvs_handle_t handle;
+    esp_err_t err = nvs_open(namespace_name, NVS_READONLY, &handle);
+    if (err != ESP_OK)
+    {
+        return;
+    }
+
+    switch (type)
+    {
+    case NVS_TYPE_I8: {
+        int8_t value;
+        if (nvs_get_i8(handle, key, &value) == ESP_OK)
+        {
+            ESP_LOGI(TAG, "  -> Value (I8): %d", value);
+        }
+        break;
+    }
+    case NVS_TYPE_I32: {
+        int32_t value;
+        if (nvs_get_i32(handle, key, &value) == ESP_OK)
+        {
+            ESP_LOGI(TAG, "  -> Value (I32): %d", value);
+        }
+        break;
+    }
+    case NVS_TYPE_STR: {
+        size_t length = 0;
+        nvs_get_str(handle, key, NULL, &length);
+        if (length > 0)
+        {
+            char *value = malloc(length);
+            if (nvs_get_str(handle, key, value, &length) == ESP_OK)
+            {
+                ESP_LOGI(TAG, "  -> Value (STR): %s", value);
+            }
+            free(value);
+        }
+        break;
+    }
+    case NVS_TYPE_BLOB: {
+        size_t length = 0;
+        nvs_get_blob(handle, key, NULL, &length);
+        if (length > 0)
+        {
+            ESP_LOGI(TAG, "  -> Value (BLOB): %d bytes", length);
+
+            // Optional: Erste Bytes als Hex anzeigen
+            uint8_t *blob = malloc(length);
+            if (nvs_get_blob(handle, key, blob, &length) == ESP_OK)
+            {
+                ESP_LOG_BUFFER_HEX_LEVEL(TAG, blob, MIN(length, 32), ESP_LOG_INFO);
+            }
+            free(blob);
+        }
+        break;
+    }
+    default:
+        break;
+    }
+
+    nvs_close(handle);
+}
+
+static void list_all_nvs_entries(void)
+{
+    ESP_LOGI(TAG, "========== NVS ENTRIES ==========");
+
+    nvs_iterator_t it = NULL;
+    esp_err_t err;
+
+    // Iterator für alle Namespaces und Keys erstellen
+    err = nvs_entry_find(NVS_DEFAULT_PART_NAME, NULL, NVS_TYPE_ANY, &it);
+
+    while (err == ESP_OK)
+    {
+        nvs_entry_info_t info;
+        nvs_entry_info(it, &info);
+
+        ESP_LOGI(TAG, "Namespace: %-16s | Key: %-16s | Type: %s", info.namespace_name, info.key,
+                 nvs_type_to_str(info.type));
+
+        // Optional: Wert anzeigen
+        display_nvs_value(info.namespace_name, info.key, info.type);
+
+        err = nvs_entry_next(&it);
+    }
+
+    nvs_release_iterator(it);
+    ESP_LOGI(TAG, "==================================");
+}
+
+static void check_nvs_stats(void)
+{
+    nvs_stats_t nvs_stats;
+    esp_err_t err = nvs_get_stats(NULL, &nvs_stats);
+    if (err == ESP_OK)
+    {
+        ESP_LOGI(TAG, "NVS: Used entries = %d, Free entries = %d, Total entries = %d", nvs_stats.used_entries,
+                 nvs_stats.free_entries, nvs_stats.total_entries);
+
+        size_t used_kb = (nvs_stats.used_entries * 32) / 1024; // Grobe Schätzung
+        size_t free_kb = (nvs_stats.free_entries * 32) / 1024;
+        ESP_LOGI(TAG, "NVS: ~%d KB used, ~%d KB free", used_kb, free_kb);
+    }
+}
+
 void persistence_init(const char *namespace_name)
 {
     esp_err_t ret = nvs_flash_init();
@@ -20,6 +163,9 @@ void persistence_init(const char *namespace_name)
     }
     ESP_ERROR_CHECK(ret);
 
+    list_all_nvs_entries();
+    check_nvs_stats();
+
     ESP_ERROR_CHECK(nvs_open(namespace_name, NVS_READWRITE, &persistence_handle));
 
     persistence_mutex = xSemaphoreCreateMutex();
@@ -43,6 +189,10 @@ void persistence_save(persistence_value_type_t value_type, const char *key, cons
                 err = nvs_set_str(persistence_handle, key, (char *)value);
                 break;
 
+            case VALUE_TYPE_INT8:
+                err = nvs_set_i8(persistence_handle, key, *(int8_t *)value);
+                break;
+
             case VALUE_TYPE_INT32:
                 err = nvs_set_i32(persistence_handle, key, *(int32_t *)value);
                 break;
@@ -80,6 +230,10 @@ void *persistence_load(persistence_value_type_t value_type, const char *key, voi
                 err = nvs_get_str(persistence_handle, key, (char *)out, NULL);
                 break;
 
+            case VALUE_TYPE_INT8:
+                err = nvs_get_i8(persistence_handle, key, (int8_t *)out);
+                break;
+
             case VALUE_TYPE_INT32:
                 err = nvs_get_i32(persistence_handle, key, (int32_t *)out);
                 break;

firmware/components/remote_control/include/remote_control.h

@@ -1,3 +1,15 @@
 #pragma once
 
+#include "host/ble_hs.h"
+#include "sdkconfig.h"
+
+typedef struct
+{
+    uint16_t conn_handle;
+    bool is_connected;
+} ble_connection_t;
+
+extern ble_connection_t g_connections[CONFIG_BT_NIMBLE_MAX_CONNECTIONS];
+
 void remote_control_init(void);
+bool is_any_device_connected(void);

firmware/components/remote_control/include/uart_service.h

@@ -14,8 +14,7 @@ extern const ble_uuid128_t gatt_svr_chr_uart_rx_uuid;
 // TX Characteristic UUID: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E
 extern const ble_uuid128_t gatt_svr_chr_uart_tx_uuid;
 
-extern uint16_t conn_handle;
+extern uint16_t tx_chr_val_handle; // This is still needed as it's set once by the stack
-extern uint16_t tx_chr_val_handle;
 
 int gatt_svr_chr_uart_access(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
 void send_ble_data(const char *data);

firmware/components/remote_control/light_service.c

@@ -3,6 +3,7 @@
 #include "persistence.h"
 
 static uint8_t g_beacon_enabled = 0;
+static int8_t g_led_value = 0;
 
 /// Characteristic Callbacks
 int gatt_svr_chr_light_led_access(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt,
@@ -14,13 +15,18 @@ int gatt_svr_chr_light_led_access(uint16_t conn_handle, uint16_t attr_handle, st
         os_mbuf_append(ctxt->om, data, strlen(data));
         return 0;
     }
+    if (ctxt->op == BLE_GATT_ACCESS_OP_WRITE_CHR)
+    {
+        int8_t led_value = 0;
+        persistence_load(VALUE_TYPE_INT8, "LED_VALUE", &led_value);
+    }
     return BLE_ATT_ERR_UNLIKELY;
 }
 
 int gatt_svr_chr_light_beacon_access(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt,
                                      void *arg)
 {
-    persistence_load(VALUE_TYPE_INT32, "BEACON_ENABLED", &g_beacon_enabled);
+
     if (ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR)
     {
         return os_mbuf_append(ctxt->om, &g_beacon_enabled, sizeof(g_beacon_enabled)) == 0
@@ -29,6 +35,9 @@ int gatt_svr_chr_light_beacon_access(uint16_t conn_handle, uint16_t attr_handle,
     }
     if (ctxt->op == BLE_GATT_ACCESS_OP_WRITE_CHR)
     {
+        int8_t beacon_enabled = 0;
+        persistence_load(VALUE_TYPE_INT8, "BEACON_ENABLED", &beacon_enabled);
+
         // it has to be 1 Byte (0 or 1)
         if (OS_MBUF_PKTLEN(ctxt->om) != 1)
         {
@@ -56,7 +65,7 @@ int gatt_svr_chr_light_beacon_access(uint16_t conn_handle, uint16_t attr_handle,
         {
             beacon_stop();
         }
-        persistence_save(VALUE_TYPE_INT32, "BEACON_ENABLED", &g_beacon_enabled);
+        persistence_save(VALUE_TYPE_INT8, "BEACON_ENABLED", &g_beacon_enabled);
         return 0;
     }
     return BLE_ATT_ERR_UNLIKELY;

firmware/components/remote_control/remote_control.c

@@ -5,6 +5,7 @@
 
 #include "esp_event.h"
 #include "esp_log.h"
+#include "esp_mac.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/event_groups.h"
 #include "freertos/task.h"
@@ -21,6 +22,8 @@
 #include "services/gap/ble_svc_gap.h"
 #include "services/gatt/ble_svc_gatt.h"
 
+void ble_store_config_init(void);
+
 static const char *TAG = "remote_control";
 
 static const ble_uuid16_t gatt_svr_svc_device_uuid = BLE_UUID16_INIT(0x180A);
@@ -29,6 +32,29 @@ static const ble_uuid16_t gatt_svr_svc_settings_uuid = BLE_UUID16_INIT(0xA999);
 
 uint8_t ble_addr_type;
 
+ble_connection_t g_connections[CONFIG_BT_NIMBLE_MAX_CONNECTIONS];
+
+static void init_connection_pool()
+{
+    for (int i = 0; i < CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++)
+    {
+        g_connections[i].conn_handle = BLE_HS_CONN_HANDLE_NONE;
+        g_connections[i].is_connected = false;
+    }
+}
+
+bool is_any_device_connected(void)
+{
+    for (int i = 0; i < CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++)
+    {
+        if (g_connections[i].is_connected)
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
 static void ble_app_advertise(void);
 
 // Descriptors for the Beacon Characteristic
@@ -121,14 +147,16 @@ static const struct ble_gatt_svc_def gatt_svcs[] = {
                 {
                     // Beacon Characteristic
                     .uuid = BLE_UUID16_DECLARE(0xBEA0),
-                    .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE,
+                    .flags =
+                        BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ_ENC | BLE_GATT_CHR_F_WRITE_ENC,
                     .access_cb = gatt_svr_chr_light_beacon_access,
                     .descriptors = beacon_char_desc,
                 },
                 {
                     // LED Characteristic
                     .uuid = BLE_UUID16_DECLARE(0xF037),
-                    .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE,
+                    .flags =
+                        BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ_ENC | BLE_GATT_CHR_F_WRITE_ENC,
                     .access_cb = gatt_svr_chr_light_led_access,
                     .descriptors = led_char_desc,
                 },
@@ -165,22 +193,173 @@ static const struct ble_gatt_svc_def gatt_svcs[] = {
     },
     {0}};
 
+inline static void format_addr(char *addr_str, uint8_t addr[])
+{
+    sprintf(addr_str, "%02X:%02X:%02X:%02X:%02X:%02X", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+}
+
+static void print_conn_desc(struct ble_gap_conn_desc *desc)
+{
+    /* Local variables */
+    char addr_str[18] = {0};
+
+    /* Connection handle */
+    ESP_LOGI(TAG, "connection handle: %d", desc->conn_handle);
+
+    /* Local ID address */
+    format_addr(addr_str, desc->our_id_addr.val);
+    ESP_LOGI(TAG, "device id address: type=%d, value=%s", desc->our_id_addr.type, addr_str);
+
+    /* Peer ID address */
+    format_addr(addr_str, desc->peer_id_addr.val);
+    ESP_LOGI(TAG, "peer id address: type=%d, value=%s", desc->peer_id_addr.type, addr_str);
+
+    /* Connection info */
+    ESP_LOGI(TAG,
+             "conn_itvl=%d, conn_latency=%d, supervision_timeout=%d, "
+             "encrypted=%d, authenticated=%d, bonded=%d\n",
+             desc->conn_itvl, desc->conn_latency, desc->supervision_timeout, desc->sec_state.encrypted,
+             desc->sec_state.authenticated, desc->sec_state.bonded);
+}
+
 // BLE event handling
 static int ble_gap_event(struct ble_gap_event *event, void *arg)
 {
+    esp_err_t rc;
+    struct ble_gap_conn_desc desc;
+
     switch (event->type)
     {
     case BLE_GAP_EVENT_CONNECT:
-        ESP_LOGI(TAG, "Connection established; status=%d", event->connect.status);
+        /* A new connection was established or a connection attempt failed. */
-        conn_handle = event->connect.conn_handle;
+        ESP_LOGI(TAG, "connection %s; status=%d", event->connect.status == 0 ? "established" : "failed",
-        ESP_LOGI(TAG, "Connection handle: %d", conn_handle);
+                 event->connect.status);
+
+        /* Connection succeeded */
+        if (event->connect.status == 0)
+        {
+            bool found_slot = false;
+            for (int i = 0; i < CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++)
+            {
+                if (!g_connections[i].is_connected)
+                {
+                    g_connections[i].conn_handle = event->connect.conn_handle;
+                    g_connections[i].is_connected = true;
+                    found_slot = true;
+                    ESP_LOGI(TAG, "Connection stored in slot %d", i);
                     break;
+                }
+            }
+            if (!found_slot)
+            {
+                ESP_LOGW(TAG, "No free connection slot available!");
+            }
+
+            /* Check connection handle */
+            rc = ble_gap_conn_find(event->connect.conn_handle, &desc);
+            if (rc != 0)
+            {
+            }
+
+            print_conn_desc(&desc);
+
+            /* Try to update connection parameters */
+            struct ble_gap_upd_params params = {.itvl_min = desc.conn_itvl,
+                                                .itvl_max = desc.conn_itvl,
+                                                .latency = 3,
+                                                .supervision_timeout = desc.supervision_timeout};
+            rc = ble_gap_update_params(event->connect.conn_handle, &params);
+            if (rc != 0)
+            {
+                ESP_LOGE(TAG, "failed to update connection parameters, error code: %d", rc);
+                return rc;
+            }
+        }
+        /* Connection failed, restart advertising */
+        else
+        {
+            ble_app_advertise();
+        }
+        return rc;
 
     case BLE_GAP_EVENT_DISCONNECT:
         ESP_LOGI(TAG, "Disconnected; reason=%d", event->disconnect.reason);
-        conn_handle = 0;
+        for (int i = 0; i < CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++)
-        ble_app_advertise();
+        {
+            if (g_connections[i].conn_handle == event->disconnect.conn.conn_handle)
+            {
+                g_connections[i].is_connected = false;
+                g_connections[i].conn_handle = BLE_HS_CONN_HANDLE_NONE;
+                ESP_LOGI(TAG, "Connection from slot %d removed", i);
+                ble_app_advertise(); // Restart advertising to allow new connections
                 break;
+            }
+        }
+        break;
+
+    case BLE_GAP_EVENT_PASSKEY_ACTION:
+        ESP_LOGI(TAG, "Passkey action required: %d", event->passkey.params.action);
+        struct ble_sm_io pkey = {0};
+
+        switch (event->passkey.params.action)
+        {
+        case BLE_SM_IOACT_DISP:
+            pkey.action = BLE_SM_IOACT_DISP;
+            pkey.passkey = CONFIG_BONDING_PASSPHRASE;
+            ESP_LOGI(TAG, "Displaying passkey: %06d", pkey.passkey);
+            rc = ble_sm_inject_io(event->passkey.conn_handle, &pkey);
+            if (rc != 0)
+            {
+                ESP_LOGE(TAG, "failed to inject security manager io, error code: %d", rc);
+                return rc;
+            }
+            break;
+
+        default:
+            ESP_LOGE(TAG, "Unknown passkey action: %d", event->passkey.params.action);
+            return 0;
+        }
+        break;
+
+    case BLE_GAP_EVENT_ENC_CHANGE:
+        ESP_LOGI(TAG, "Encryption change event; status=%d", event->enc_change.status);
+
+        if (event->enc_change.status != 0)
+        {
+            ESP_LOGW(TAG, "Encryption failed with status %d", event->enc_change.status);
+
+            rc = ble_gap_conn_find(event->enc_change.conn_handle, &desc);
+            if (rc == 0)
+            {
+                char addr_str[18] = {0};
+                format_addr(addr_str, desc.peer_id_addr.val);
+                ESP_LOGI(TAG, "Deleting bond for peer: %s", addr_str);
+
+                ble_store_util_delete_peer(&desc.peer_id_addr);
+
+                ble_gap_terminate(event->enc_change.conn_handle, BLE_ERR_REM_USER_CONN_TERM);
+            }
+        }
+        else
+        {
+            ESP_LOGI(TAG, "Encryption successfully established");
+        }
+        break;
+
+    case BLE_GAP_EVENT_REPEAT_PAIRING:
+        ESP_LOGI(TAG, "Repeat pairing requested");
+
+        rc = ble_gap_conn_find(event->repeat_pairing.conn_handle, &desc);
+        if (rc == 0)
+        {
+            char addr_str[18] = {0};
+            format_addr(addr_str, desc.peer_id_addr.val);
+            ESP_LOGI(TAG, "Deleting old bond for specific peer: %s", addr_str);
+
+            ble_store_util_delete_peer(&desc.peer_id_addr);
+        }
+
+        return BLE_GAP_REPEAT_PAIRING_RETRY;
 
     case BLE_GAP_EVENT_ADV_COMPLETE:
         ESP_LOGI(TAG, "Advertising complete");
@@ -254,15 +433,29 @@ static void ble_app_advertise(void)
     }
 }
 
-// The application
+static void on_stack_reset(int reason)
-static void ble_app_on_sync(void)
 {
+    /* On reset, print reset reason to console */
+    ESP_LOGI(TAG, "nimble stack reset, reset reason: %d", reason);
+}
+
+static void on_stack_sync(void)
+{
+    esp_err_t ret;
     uint8_t ble_addr[6] = {0};
-    int ret = ble_hs_id_copy_addr(BLE_ADDR_PUBLIC, ble_addr, NULL);
+
+    /* Figure out address to use while advertising (no privacy for now) */
+    ret = ble_hs_id_infer_auto(0, &ble_addr_type);
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "error determining address type; rc=%d", ret);
+        return;
+    }
+
+    ret = ble_hs_id_copy_addr(ble_addr_type, ble_addr, NULL);
     if (ret != 0)
     {
         ESP_LOGE(TAG, "Failed to get BLE MAC address (err: %d)", ret);
-        return;
     }
 
     char formatted_name[32];
@@ -270,26 +463,88 @@ static void ble_app_on_sync(void)
     ble_svc_gap_device_name_set(formatted_name);
 
     // Start Advertising
-    ble_hs_id_infer_auto(0, &ble_addr_type); // Determines the best address type automatically
     ble_app_advertise();
 }
 
+static esp_err_t gatt_svc_init(void)
+{
+    esp_err_t ret;
+    ble_svc_gatt_init();
+
+    ret = ble_gatts_count_cfg(gatt_svcs);
+    if (ret != ESP_OK)
+    {
+        return ret;
+    }
+
+    ret = ble_gatts_add_svcs(gatt_svcs);
+    if (ret != ESP_OK)
+    {
+        return ret;
+    }
+
+    return ESP_OK;
+}
+
+static esp_err_t gap_init(void)
+{
+    ble_svc_gap_init();
+
+    return ESP_OK;
+}
+
 // The infinite task
 static void host_task(void *param)
 {
     nimble_port_run(); // This function will return only when nimble_port_stop() is executed
 }
 
+static void nimble_host_config_init(void)
+{
+    // callbacks
+    ble_hs_cfg.reset_cb = on_stack_reset;
+    ble_hs_cfg.sync_cb = on_stack_sync;
+
+    ble_hs_cfg.sm_io_cap = BLE_SM_IO_CAP_DISP_ONLY;
+    ble_hs_cfg.sm_bonding = 1;
+    ble_hs_cfg.sm_mitm = 1;
+    ble_hs_cfg.sm_our_key_dist |= BLE_SM_PAIR_KEY_DIST_ENC | BLE_SM_PAIR_KEY_DIST_ID;
+    ble_hs_cfg.sm_their_key_dist |= BLE_SM_PAIR_KEY_DIST_ENC | BLE_SM_PAIR_KEY_DIST_ID;
+
+    // Initialize BLE store configuration
+    ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
+
+    ble_store_config_init();
+}
+
 void remote_control_init(void)
 {
-    nimble_port_init();
+    esp_err_t ret;
-    ble_svc_gap_init();
-    ble_svc_gatt_init();
-    ble_gatts_count_cfg(gatt_svcs);
-    ble_gatts_add_svcs(gatt_svcs);
 
-    // Callback for synchronization
+    ret = nimble_port_init();
-    ble_hs_cfg.sync_cb = ble_app_on_sync;
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to initialize nimble stack (err: %s)", esp_err_to_name(ret));
+        return;
+    }
+
+    init_connection_pool();
+
+    ret = gap_init();
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to initialize GAP service (err: %s)", esp_err_to_name(ret));
+        return;
+    }
+
+    ret = gatt_svc_init();
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to initialize GATT server (err: %s)", esp_err_to_name(ret));
+        return;
+    }
+
+    nimble_host_config_init();
 
     nimble_port_freertos_init(host_task); // Start BLE host task
 

firmware/components/remote_control/uart_service.c

@@ -1,4 +1,7 @@
 #include "include/uart_service.h"
+#include "esp_log.h"
+#include "include/remote_control.h"
+#include "sdkconfig.h"
 
 static const char *TAG = "uart_service";
 
@@ -14,7 +17,6 @@ const ble_uuid128_t gatt_svr_chr_uart_rx_uuid =
 const ble_uuid128_t gatt_svr_chr_uart_tx_uuid =
     BLE_UUID128_INIT(0x9E, 0xCA, 0xDC, 0x24, 0x0E, 0xE5, 0xA9, 0xE0, 0x93, 0xF3, 0xA3, 0xB5, 0x03, 0x00, 0x40, 0x6E);
 
-uint16_t conn_handle;
 uint16_t tx_chr_val_handle;
 
 // Callback function for GATT events (read/write on characteristics)
@@ -51,19 +53,26 @@ int gatt_svr_chr_uart_access(uint16_t conn_handle, uint16_t attr_handle, struct
 // Function to send data via the TX characteristic
 void send_ble_data(const char *data)
 {
-    if (conn_handle != 0)
+    ESP_LOGI(TAG, "Preparing to send data: %s", data);
-    { // Only send when connected
+
-        struct os_mbuf *om = ble_hs_mbuf_from_flat(data, strlen(data));
+    struct os_mbuf *om;
+
+    for (int i = 0; i < CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++)
+    {
+        if (g_connections[i].is_connected)
+        {
+            om = ble_hs_mbuf_from_flat(data, strlen(data));
             if (om)
             {
-            int rc = ble_gatts_notify_custom(conn_handle, tx_chr_val_handle, om);
+                int rc = ble_gatts_notify_custom(g_connections[i].conn_handle, tx_chr_val_handle, om);
                 if (rc == 0)
                 {
-                ESP_LOGI(TAG, "Sent data: %s", data);
+                    ESP_LOGI(TAG, "Sent data to conn_handle %d: %s", g_connections[i].conn_handle, data);
                 }
-            else
+                else if (rc != BLE_HS_ENOTCONN) // Ignore "not connected" errors if a device just disconnected
                 {
-                ESP_LOGE(TAG, "Error sending data: %d", rc);
+                    ESP_LOGE(TAG, "Error sending data to conn_handle %d: %d", g_connections[i].conn_handle, rc);
+                }
             }
         }
     }
@@ -76,7 +85,7 @@ void uart_tx_task(void *param)
     while (1)
     {
         vTaskDelay(pdMS_TO_TICKS(2000));
-        if (conn_handle != 0)
+        if (is_any_device_connected())
         {
             ESP_LOGI(TAG, "Sending data over BLE UART TX");
             sprintf(buffer, "Hello World #%d", count++);

firmware/main/Kconfig.projbuild

@@ -15,4 +15,29 @@ menu "Warnemuende Lighthouse"
         int
         default 1 if WLED_USE_DMA
         default 0 if !WLED_USE_DMA
+
+    config WLED_WITH_WHITE
+        bool "WLED with White Channel"
+        default y
+        help
+            Use a WLED strip with a white channel (e.g. WS2812B RGBW).
+
+    config LED_PIN_LEFT
+        int "LED Left Pin"
+        default 11
+        help
+            The pin of the LED for the left side.
+
+    config LED_PIN_RIGHT
+        int "LED Right Pin"
+        default 12
+        help
+            The pin of the LED for the right side.
+
+    config BONDING_PASSPHRASE
+        int "Bonding Passphrase"
+        default 123456
+        help
+            The passphrase for the BLE bonding.
+
 endmenu

firmware/main/main.c

@@ -25,14 +25,6 @@ void app_main(void)
         printf("Failed to initialize beacon");
         return;
     }
-    /// start beacon service
-    uint8_t beacon_enabled = 1;
-    persistence_load(VALUE_TYPE_INT32, "BEACON_ENABLED", &beacon_enabled);
-    if (beacon_enabled && beacon_start() != ESP_OK)
-    {
-        printf("Failed to start beacon");
-        return;
-    }
 
     /// start outdoor light service
     if (outdoor_start() != ESP_OK)

firmware/partitions.csv

@@ -1,6 +1,5 @@
 # Name   , Type , SubType  , Offset  , Size  , Flags
-nvs      , data , nvs      , 0x9000  ,   20k ,
+nvs      , data , nvs      , 0x9000  ,   24k ,
-otadata  , data , ota      , 0xe000  ,    8k ,
+phy_init , data , phy      ,         ,    4k ,
-app0     , app  , ota_0    , 0x10000 , 1792k ,
+factory  , app  , factory  , 0x10000 , 3584K ,
-app1     , app  , ota_1    ,         , 1792k ,
 coredump , data , coredump ,         ,   64k ,

firmware/sdkconfig.defaults

@@ -3,10 +3,10 @@ CONFIG_BT_ENABLED=y
 CONFIG_BT_NIMBLE_ENABLED=y
 
 # NimBLE Options
-CONFIG_BT_NIMBLE_SECURITY_ENABLE=n
+CONFIG_BT_NIMBLE_SECURITY_ENABLE=y
-CONFIG_BT_NIMBLE_SVC_GAP_DEVICE_NAME="lighthouse"
 CONFIG_BT_NIMBLE_NVS_PERSIST=y
 CONFIG_BT_NIMBLE_SMP_ID_RESET=y
+CONFIG_NIMBLE_CRYPTO_STACK_MBEDTLS=y
 
 # Flash Size
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y