52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
"""
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Read heart rate data from a heart rate peripheral using the standard BLE
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Heart Rate service.
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"""
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import time
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import adafruit_ble
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import board
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from adafruit_ble_heart_rate import HeartRateService
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import pyloton
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# PyLint can't find BLERadio for some reason so special case it here.
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ble = adafruit_ble.BLERadio() # pylint: disable=no-member
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display = board.DISPLAY
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# 84.229 is wheel circumference (700x23 in my case)
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pyloton = pyloton.Pyloton(ble, display, 84.229)
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pyloton.show_splash()
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hr_connection = None
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# Start with a fresh connection.
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if ble.connected:
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for connection in ble.connections:
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if HeartRateService in connection:
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connection.disconnect()
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break
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start = time.time()
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hr_connection = None
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speed_cad_connection = []
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while True:
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if not hr_connection:
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print("Running hr_connection")
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hr_connection = pyloton.heart_connect()
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ble.stop_scan()
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if not speed_cad_connection:
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print("Running speed_cad_connection")
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speed_cad_connection = pyloton.speed_cad_connect()
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if time.time()-start >= 45:
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pyloton.timeout()
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break
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# Stop scanning whether or not we are connected.
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ble.stop_scan()
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if hr_connection and hr_connection.connected and speed_cad_connection:
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print("Fetch connection")
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hr_service = hr_connection[HeartRateService]
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print("Location:", hr_service.location)
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pyloton.setup_display()
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while hr_connection.connected:
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pyloton.update_display(hr_service)
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