jepler/Adafruit_CircuitPython_BLE_iBBQ
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defer buffer creations until MTU known

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This commit is contained in:
Dan Halbert 2020-04-30 00:03:18 -04:00
parent f8766e140d
commit 79e7238c73
1 changed files with 12 additions and 6 deletions
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18
adafruit_ble_ibbq.py
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@ -94,12 +94,9 @@ class IBBQService(Service):
def __init__(self, service=None):
super().__init__(service=service)
self._settings_result_buf = bytearray(
self.settings_result.packet_size # pylint: disable=no-member
)
self._realtime_data_buf = bytearray(
self.realtime_data.packet_size # pylint: disable=no-member
)
# Defer creating buffers until needed, since MTU is not known yet.
self._settings_result_buf = None
self._realtime_data_buf = None
uuid = StandardUUID(0xFFF0)
@ -151,6 +148,10 @@ class IBBQService(Service):
"""Return a tuple of temperatures for all the possible temperature probes on the device.
Temperatures are in degrees Celsius. Unconnected probes return 0.0.
"""
if self._realtime_data_buf is None:
self._realtime_data_buf = bytearray(
self.realtime_data.packet_size # pylint: disable=no-member
)
data = self._realtime_data_buf
length = self.realtime_data.readinto(data) # pylint: disable=no-member
if length > 0:
@ -167,6 +168,11 @@ class IBBQService(Service):
Results are approximate and may differ from the
actual battery voltage by 0.1v or so.
"""
if self._settings_result_buf is None:
self._settings_result_buf = bytearray(
self.settings_result.packet_size # pylint: disable=no-member
)
self.settings_data = self._REQUEST_BATTERY_LEVEL_MSG
results = self._settings_result_buf
length = self.settings_result.readinto(results) # pylint: disable=no-member