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@@ -166,7 +166,7 @@ dev.grab()
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async def print_events(device):
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async for event in device.async_read_loop():
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- print(device.path, evdev.categorize(event, sep=': ')
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+ print(device.path, evdev.categorize(event, sep=': '))
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for device in dev:
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asyncio.ensure_future(print_events(dev))
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@@ -177,6 +177,57 @@ for device in dev:
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The above has to be played around with but it looks like the seeds are there.
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+---
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+
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+If you don't care about capturing multiple devices at once (within a single program), the following does an active poll:
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+
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+```
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+#!/usr/bin/python3
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+
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+import os, sys, evdev, asyncio, os.path
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+from evdev import InputDevice, categorize, ecodes
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+
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+dev_init = False
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+dev = { }
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+
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+HID_NAME = 'HID c216:0180'
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+
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+evfns_n = 13
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+evfns_bd = "/dev/input/"
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+evfns = [ ]
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+
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+for x in range(evfns_n):
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+ fn = evfns_bd + "event" + str(x)
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+ if (os.path.exists(fn)):
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+ evfns.append(fn)
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+
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+for evfn in evfns:
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+ _dev = evdev.InputDevice(evfn)
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+ print("device:", _dev.name)
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+ if _dev.name == HID_NAME:
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+ dev_init = True
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+ dev = _dev
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+ break
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+
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+if not dev_init:
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+ print("could not find device, exiting")
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+ sys.exit(0)
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+
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+print(dev)
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+print(dev.capabilities())
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+print(dev.capabilities(verbose=True))
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+
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+dev.grab()
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+
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+for event in dev.read_loop():
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+ if event.type == ecodes.EV_KEY:
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+ print(categorize(event))
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+
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+```
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+
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+Note that the `HID_NAME` is specific to the USB magstripe reader I had on hand.
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+Multiple of the same could be attached and would need to be differentiated by thei `/dev/input/event*` endpoints.
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+
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References
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---
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