diff -r 7448b8dd4288 -r ec5c7794dcd6 main/task_ble.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main/task_ble.c	Mon Apr 17 14:54:35 2023 +0200
@@ -0,0 +1,82 @@
+/**
+ * @file task_ble.c
+ * @brief BLE task. Secure GATT server.
+ */
+
+#include "config.h"
+
+
+static const char *TAG = "task_ble";
+
+
+
+void task_ble( void * pvParameters )
+{
+    esp_err_t	ret;
+
+    ESP_LOGI(TAG, "Starting BLE task");
+
+    /*
+     * Initialize Bluetooth
+     */
+    ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT));
+
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret) {
+        ESP_LOGE(TAG, "init controller failed: %s", esp_err_to_name(ret));
+        goto deadend;
+    }
+
+    ret = esp_bt_controller_enable(ESP_BT_MODE_BLE);
+    if (ret) {
+        ESP_LOGE(TAG, "enable controller failed: %s", esp_err_to_name(ret));
+        goto deadend;
+    }
+
+    ESP_LOGI(TAG, "init bluetooth");
+    ret = esp_bluedroid_init();
+    if (ret) {
+        ESP_LOGE(TAG, "init bluetooth failed: %s", esp_err_to_name(ret));
+        goto deadend;
+    }
+
+    ret = esp_bluedroid_enable();
+    if (ret) {
+        ESP_LOGE(TAG, "enable bluetooth failed: %s", esp_err_to_name(ret));
+        goto deadend;
+    }
+
+    ret = ble_balkon_gatts_register();
+    if (ret)
+	goto deadend;
+
+    ble_balkon_gap_register();
+
+    ret = ble_balkon_gatts_app_register();
+    if (ret)
+	goto deadend;
+
+    ret = ble_balkon_gatts_set_mtu();
+    if (ret)
+	goto deadend;
+
+    ESP_LOGI(TAG, "Start BLE done, enter loop");
+
+    for(;;) {
+
+
+	vTaskDelay(20 / portTICK_PERIOD_MS);
+    } /* for(;;) */
+
+
+    /*
+     * Error point for init errors.
+     */
+deadend:
+    ESP_LOGI(TAG, "Startup error loop");
+    for(;;) {
+	vTaskDelay(50 / portTICK_PERIOD_MS);
+    }
+}
+