def run(self):
"""Thread that keeps connection alive."""
cached_char = Characteristic(BLE_TEMP_UUID, BLE_TEMP_HANDLE)
adapter = GATTToolBackend()
while True:
try:
_LOGGER.debug("Connecting to %s", self.name)
# We need concurrent connect, so lets not reset the device
adapter.start(reset_on_start=False)
# Seems only one connection can be initiated at a time
with CONNECT_LOCK:
device = adapter.connect(
self.mac, CONNECT_TIMEOUT, BLEAddressType.random
)
if SKIP_HANDLE_LOOKUP:
# HACK: inject handle mapping collected offline
# pylint: disable=protected-access
device._characteristics[UUID(BLE_TEMP_UUID)] = cached_char
# Magic: writing this makes device happy
device.char_write_handle(0x1B, bytearray([255]), False)
device.subscribe(BLE_TEMP_UUID, self._update)
_LOGGER.info("Subscribed to %s", self.name)
while self.keep_going:
# protect against stale connections, just read temperature
device.char_read(BLE_TEMP_UUID, timeout=CONNECT_TIMEOUT)
self.event.wait(60)
break
except (BLEError, NotConnectedError, NotificationTimeout) as ex:
_LOGGER.error("Exception: %s ", str(ex))
finally:
adapter.stop()
def setUp(self):
self.patchers = []
self.patchers.append(
patch('pygatt.backends.gatttool.gatttool.pexpect.spawn'))
self.spawn = self.patchers[0].start()
self.spawn.return_value.isalive.return_value = False
self.spawn.return_value.read_nonblocking.side_effect = (
pexpect.EOF(value=None))
self.patchers.append(
patch('pygatt.backends.gatttool.gatttool.subprocess'))
self.patchers[1].start()
# Just keep saying we got the "Connected" response
def rate_limited_expect(*args, **kwargs):
# Sleep a little bit to stop the receive thread from spinning and
# eating 100% CPU during the tests
time.sleep(0.001)
# This is hacky, but we sort the event list in the GATTTool receiver
# and hard code where we expect the "Connected" event to be.
return 4
self.spawn.return_value.expect.side_effect = rate_limited_expect
self.backend = GATTToolBackend()
self.backend.start()
def setUp(self):
raise SkipTest()
self.patchers = []
self.patchers.append(
patch('pygatt.backends.gatttool.gatttool.pexpect.spawn'))
self.spawn = self.patchers[0].start()
self.spawn.return_value.isalive.return_value = False
self.patchers.append(
patch('pygatt.backends.gatttool.gatttool.subprocess'))
self.patchers[1].start()
self.backend = GATTToolBackend()
self.mock_expect = patch.object(self.backend, '_expect').start()
self.backend.start()
