docs/library/ubluetooth: Add note about API being under development.
@@ -12,6 +12,9 @@ roles concurrently.
This API is intended to match the low-level Bluetooth protocol and provide
building-blocks for higher-level abstractions such as specific device types.
+.. note:: This module is still under development and its classes, functions,
+ methods and constants are subject to change.
+
class BLE
---------
