BLE connection disconnect(reason)에 따른 Advertising Timeout

- 비정상 연결 해제 시 무제한 광고
- 그 외 10분 광고 후 전원 OFF

src/ble/ble_service.c

@@ -276,6 +276,21 @@ static void adv_restart_handler(struct k_work *work)
     led_set_state(LED_STATE_ADVERTISING);
 }
 
+static bool ble_disconnect_reason_uses_unlimited_adv(uint8_t reason)
+{
+    switch (reason)
+    {
+    case BT_HCI_ERR_CONN_TIMEOUT:
+    case BT_HCI_ERR_LL_RESP_TIMEOUT:
+    case BT_HCI_ERR_TERM_DUE_TO_MIC_FAIL:
+    case BT_HCI_ERR_CONN_FAIL_TO_ESTAB:
+        return true;
+
+    default:
+        return false;
+    }
+}
+
 static void adv_timeout_handler(struct k_work *work)
 {
     ARG_UNUSED(work);
@@ -284,6 +299,7 @@ static void adv_timeout_handler(struct k_work *work)
     {
         DBG_PRINTF("[BLE] Advertising timeout\r\n");
         (void)ble_advertising_stop();
+        device_power_off_reason("ble-advertising-timeout");
     }
 }
 
@@ -424,8 +440,10 @@ static void disconnected(struct bt_conn *conn, uint8_t reason)
     }
 
     ble_connection_st = false;
-    advertising_unlimited = true;
-    DBG_CORE("[BLE] Disconnected (reason 0x%02x)\r\n", reason);
+    advertising_unlimited = ble_disconnect_reason_uses_unlimited_adv(reason);
+    DBG_CORE("[BLE] Disconnected reason=0x%02x adv=%s\r\n",
+             reason,
+             advertising_unlimited ? "unlimited" : "10min");
 
     /* 워크큐에서 advertising 재시작 */
     k_work_submit(&adv_restart_work);