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# Copyright 2021-2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
from bumble import utils
from bumble.device import Device
from bumble.hci import HCI_Reset_Command
# -----------------------------------------------------------------------------
class Scanner(utils.EventEmitter):
"""
Scanner web app
Emitted events:
update: Emit when new `ScanEntry` are available.
"""
class ScanEntry:
def __init__(self, advertisement):
self.address = advertisement.address.to_string(False)
self.address_type = (
'Public',
'Random',
'Public Identity',
'Random Identity',
)[advertisement.address.address_type]
self.rssi = advertisement.rssi
self.data = advertisement.data.to_string('\n')
def __init__(self, hci_source, hci_sink):
super().__init__()
self.device = Device.with_hci(
'Bumble', 'F0:F1:F2:F3:F4:F5', hci_source, hci_sink
)
self.scan_entries = {}
self.device.on('advertisement', self.on_advertisement)
async def start(self):
print('### Starting Scanner')
self.scan_entries = {}
self.emit('update', self.scan_entries)
await self.device.power_on()
await self.device.start_scanning()
print('### Scanner started')
async def stop(self):
# TODO: replace this once a proper reset is implemented in the lib.
await self.device.host.send_command(HCI_Reset_Command())
await self.device.power_off()
print('### Scanner stopped')
def on_advertisement(self, advertisement):
self.scan_entries[advertisement.address] = self.ScanEntry(advertisement)
self.emit('update', self.scan_entries)
# -----------------------------------------------------------------------------
def main(hci_source, hci_sink):
return Scanner(hci_source, hci_sink)
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