Set BLE_FILTER_CONNECTABLE default to 0. (#1017)

docs/integrate/openhab2.md

@@ -10,6 +10,10 @@ So as to use the autodiscovery function you need to have:
 You need to set `OpenHABAutoDiscovery` to true into `config_mqttDiscovery.h`
 `#define OpenHABDiscovery true`
 
+::: tip
+If you are connecting to BLE devices it is highly recommended to set `BLE_FILTER_CONNECTABLE` to `1` in `config_BT.h`. Otherwise you may encounter incomplete data.
+:::
+
 The things will appear in the inbox of the paperUI, add them and links the channels. You should see them into the control panel for further usage.
 ![](../img/OpenMQTTgateway_OpenHAB_Control.png)