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1
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import logging
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2
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3
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import usb.core
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4
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import usb.util
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5
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6
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7
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_invalid_devices = []
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8
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9
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10
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def read_connected_devices():
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logging.debug("reading all currently connected devices")
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detected_devices = []
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13
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14
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busses = usb.busses()
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15
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for bus in busses:
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devices = bus.devices
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for dev in devices:
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device = {
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"vendor_id": dev.idVendor,
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"product_id": dev.idProduct
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}
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23
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serial_number = None
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24
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device_info = usb.core.find(idProduct=dev.idProduct)
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try:
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serial_number = usb.util.get_string(device_info, device_info.iSerialNumber)
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27
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except ValueError:
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if device not in _invalid_devices:
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logging.warning(f"Could not retrieve serial number from device {device}")
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_invalid_devices.append(device)
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31
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if serial_number is not None:
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if device in _invalid_devices:
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_invalid_devices.remove(device)
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35
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device["serial_number"] = serial_number
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detected_devices.append(device)
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38
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39
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return detected_devices
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