75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
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# Copyright 2021-2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import asyncio
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import sys
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import os
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import logging
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from bumble.colors import color
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from bumble.device import Device
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from bumble.transport import open_transport
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from bumble.profiles.heart_rate_service import HeartRateServiceProxy
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# -----------------------------------------------------------------------------
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async def main():
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if len(sys.argv) != 3:
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print('Usage: heart_rate_client.py <transport-spec> <bluetooth-address>')
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print('example: heart_rate_client.py usb:0 E1:CA:72:48:C4:E8')
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return
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print('<<< connecting to HCI...')
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async with await open_transport(sys.argv[1]) as (hci_source, hci_sink):
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print('<<< connected')
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# Create and start a device
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device = Device.with_hci('Bumble', 'F0:F1:F2:F3:F4:F5', hci_source, hci_sink)
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await device.power_on()
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# Connect to the peer
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target_address = sys.argv[2]
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print(f'=== Connecting to {target_address}...')
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async with device.connect_as_gatt(target_address) as peer:
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print(f'=== Connected to {peer}')
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heart_rate_service = peer.create_service_proxy(HeartRateServiceProxy)
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# Check that the service was found
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if not heart_rate_service:
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print('!!! Service not found')
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return
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# Read the body sensor location
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if heart_rate_service.body_sensor_location:
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location = await heart_rate_service.body_sensor_location.read_value()
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print(color('Sensor Location:', 'green'), location)
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# Subscribe to the heart rate measurement
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if heart_rate_service.heart_rate_measurement:
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await heart_rate_service.heart_rate_measurement.subscribe(
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lambda value: print(
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f'{color("Heart Rate Measurement:", "green")} {value}'
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)
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)
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await peer.sustain()
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# -----------------------------------------------------------------------------
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logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
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asyncio.run(main())
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