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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
# -----------------------------------------------------------------------------
import asyncio
import sys
import bumble.logging
from bumble.core import PhysicalTransport
from bumble.device import Device, ScoLink
from bumble.hci import HCI_Enhanced_Setup_Synchronous_Connection_Command
from bumble.hfp import ESCO_PARAMETERS, DefaultCodecParameters
from bumble.transport import open_transport
# -----------------------------------------------------------------------------
async def main() -> None:
if len(sys.argv) < 3:
print(
'Usage: run_esco_connection.py <config-file>'
'<transport-spec-for-device-1> <transport-spec-for-device-2>'
)
print(
'example: run_esco_connection.py classic1.json'
'tcp-client:127.0.0.1:6402 tcp-client:127.0.0.1:6402'
)
return
print('<<< connecting to HCI...')
hci_transports = await asyncio.gather(
open_transport(sys.argv[2]), open_transport(sys.argv[3])
)
print('<<< connected')
devices = [
Device.from_config_file_with_hci(
sys.argv[1], hci_transport.source, hci_transport.sink
)
for hci_transport in hci_transports
]
devices[0].classic_enabled = True
devices[1].classic_enabled = True
await asyncio.gather(*[device.power_on() for device in devices])
connections = await asyncio.gather(
devices[0].accept(devices[1].public_address),
devices[1].connect(
devices[0].public_address, transport=PhysicalTransport.BR_EDR
),
)
def on_sco(sco_link: ScoLink):
connections[0].abort_on('disconnection', sco_link.disconnect())
devices[0].once('sco_connection', on_sco)
await devices[0].send_command(
HCI_Enhanced_Setup_Synchronous_Connection_Command(
connection_handle=connections[0].handle,
**ESCO_PARAMETERS[DefaultCodecParameters.ESCO_CVSD_S3].asdict(),
)
)
await asyncio.gather(
*[hci_transport.source.terminated for hci_transport in hci_transports]
)
# -----------------------------------------------------------------------------
bumble.logging.setup_basic_logging('DEBUG')
asyncio.run(main())
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