pybricksdev.ble: filter name is None in find_device()

A recent change in Bleak made this problem more apparent since it
happens nearly all of the time on Windows now. It is possible to get
an advertisement callback before the SCAN_RSP has been received in
which case there will be no local name yet. So we need to ignore those
responses and wait for one that does have the local name to ensure that
the found device has a useful .name attribute.

Fixes: https://github.com/orgs/pybricks/discussions/1010

Author: dlech

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Fixed `pybricks.ble.find_device()` returning with `name is None` on Windows ([support#1010]).
+
+[support#1010]: https://github.com/orgs/pybricks/discussions/1010
+
 ## [1.0.0-alpha.40] - 2023-03-22
 
 ### Changed

pybricksdev/ble/__init__.py

@@ -27,7 +27,8 @@ async def find_device(
         name:
             The device name. This can also be the Bluetooth address on non-Apple
             platforms or a UUID on Apple platforms. If ``name`` is ``None`` then
-            it is not used as part of the matching criteria.
+            it is not used as part of the matching criteria. The name matching
+            is not case-sensitive.
         service:
             The service UUID that is advertized.
         timeout:
@@ -45,11 +46,16 @@ def match_uuid_and_name(device: BLEDevice, adv: AdvertisementData):
         if service not in adv.service_uuids:
             return False
 
+        if adv.local_name is None:
+            # have not received SCAN_RSP yet
+            return False
+
         if (
             name is not None
             and adv.local_name != name
             and device.address.upper() != name.upper()
         ):
+            # filtering by name but name does not match
             return False
 
         return True