improved hid++ support

lib/hidapi/udev.py

@@ -195,6 +195,7 @@ def read(device_handle, bytes_count, timeout_ms=-1):
 	if rlist:
 		assert rlist == [device_handle]
 		data = _os.read(device_handle, bytes_count)
+		assert data is not None
 		return data
 	else:
 		return b''

lib/logitech/unifying_receiver/receiver.py

@@ -252,7 +252,7 @@ class Receiver(object):
 			return False
 		if enable:
 			# set all possible flags
-			ok = self.request(0x8000, 0xFF, 0xFF)  # and self.request(0x8002, 0x02)
+			ok = self.request(0x8000, 0xFF, 0xFF, 0xFF)
 		else:
 			# clear out all possible flags
 			ok = self.request(0x8000)

lib/logitech/unifying_receiver/status.py

@@ -193,9 +193,15 @@ class DeviceStatus(dict):
 
 			return True
 
+		if event.sub_id == 0x49:
+			# raw input event? just ignore it
+			# if event.address == 0x01, no idea what it is
+			# if event.address == 0x03, it's an actual input event
+			return True
+
 		if event.sub_id == 0x4B:
 			if event.address == 0x01:
-				_log.debug("device came online? %d", event.devnumber)
+				_log.debug("device came online %d", event.devnumber)
 				self._changed(alert=ALERT.LOW, reason='powered on')
 			else:
 				_log.warn("unknown event %s", event)