51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
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#!/usr/bin/env python3
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"""Фоновый логгер ЧСС с BLE HR-датчика (стандарт 0x180D / 0x2A37, напр. Coospo H808S).
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Пишет строки 'epoch,bpm' в указанный файл, пока процесс не убьют. Авто-переподключение
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при обрыве. Спаривание не требуется.
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Использование: python3 tools/hr_log.py <BLE-addr> <logfile>
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"""
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import asyncio, sys, time
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from bleak import BleakClient, BleakScanner
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ADDR = sys.argv[1]
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LOG = sys.argv[2]
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HR_CHR = "00002a37-0000-1000-8000-00805f9b34fb"
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def make_cb(logf):
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def cb(_, data: bytearray):
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flags = data[0]
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bpm = int.from_bytes(data[1:3], "little") if flags & 1 else data[1]
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logf.write(f"{time.time():.1f},{bpm}\n")
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logf.flush()
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return cb
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async def main():
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logf = open(LOG, "a")
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logf.write(f"# {time.time():.1f} start addr={ADDR}\n")
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logf.flush()
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while True:
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try:
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dev = await BleakScanner.find_device_by_address(ADDR, timeout=15.0)
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if dev is None:
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logf.write(f"# {time.time():.1f} not_found, retry\n")
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logf.flush()
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await asyncio.sleep(3)
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continue
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async with BleakClient(dev) as cli:
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logf.write(f"# {time.time():.1f} connected\n")
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logf.flush()
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await cli.start_notify(HR_CHR, make_cb(logf))
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while cli.is_connected:
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await asyncio.sleep(1)
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logf.write(f"# {time.time():.1f} disconnected, reconnect\n")
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logf.flush()
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except Exception as e:
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logf.write(f"# {time.time():.1f} err {e}\n")
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logf.flush()
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await asyncio.sleep(3)
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asyncio.run(main())
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