Fixed detecting not present/unknown battery level for FastPair

TheWeirdDev · Apr 21, 2024 · 58a3e97 · 58a3e97
1 parent 6314519
commit 58a3e97
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/bluetooth_battery.py b/bluetooth_battery.py
@@ -225,8 +225,12 @@ def _perform_query_fastpair(self) -> dict[str, int]:
  if group == 3 and code == 3:
  # Example: https://github.com/google/nearby/blob/main/fastpair/common/battery_notification.cc
  def parse_level(level: int) -> int:
- # 0xff means not present/unknown
- if level == 0xff:
+ # 01234567 bits order
+ # 0x11111111 charging, but not present/unknown battery level charging
+ # 0x01111111 not charging, but not present/unknown battery level
+ # 0 bit: 1 charging, 0 not charging
+ # 1-7 bits: battery level 
+ if (level & 0x7f) == 0x7f:
  return None
  # Top bit indicates if the device is charging
  return level & 0x7f