api function to query receiver info

lib/logitech/unifying_receiver/api.py

@@ -33,6 +33,31 @@ open = _base.open
 close = _base.close
 
 
+def get_receiver_info(handle):
+	serial = None
+	reply = _base.request(handle, 0xff, b'\x83\xB5', b'\x03')
+	if reply and reply[0:1] == b'\x03':
+		serial = _hexlify(reply[1:5])
+
+	firmware = '??.??'
+	reply = _base.request(handle, 0xff, b'\x81\xF1', b'\x01')
+	if reply and reply[0:1] == b'\x01':
+		fw_version = _hexlify(reply[1:3])
+		firmware = fw_version[0:2] + '.' + fw_version[2:4]
+
+	reply = _base.request(handle, 0xff, b'\x81\xF1', b'\x02')
+	if reply and reply[0:1] == b'\x02':
+		firmware += '.B' + _hexlify(reply[1:3])
+
+	bootloader = None
+	reply = _base.request(handle, 0xff, b'\x81\xF1', b'\x04')
+	if reply and reply[0:1] == b'\x04':
+		bl_version = _hexlify(reply[1:3])
+		bootloader = bl_version[0:2] + '.' + bl_version[2:4]
+
+	return (serial, firmware, bootloader)
+
+
 def request(handle, devnumber, feature, function=b'\x00', params=b'', features=None):
 	"""Makes a feature call to the device, and returns the reply data.
 

lib/logitech/ur_scanner.py

@@ -6,33 +6,18 @@ logging.basicConfig(level=logging.DEBUG)
 
 from binascii import hexlify
 
-from .unifying_receiver import (api, base)
+from .unifying_receiver import api
 from .unifying_receiver.constants import *
 
 
 def print_receiver(receiver):
 	print ("Unifying Receiver")
 
-	reply = base.request(receiver, 0xff, b'\x83\xB5', b'\x03')
+	serial, firmware, bootloader = api.get_receiver_info(receiver)
-	if reply and reply[0:1] == b'\x03':
-		print ("  Serial: %s" % hexlify(reply[1:5]))
 
-	reply = base.request(receiver, 0xff, b'\x81\xF1', b'\x01')
+	print ("  Serial: %s" % serial)
-	if reply and reply[0:1] == b'\x01':
-		fw_version = hexlify(reply[1:3])
-		firmware = fw_version[0:2] + '.' + fw_version[2:4]
-	else:
-		firmware = '??.??'
-
-	reply = base.request(receiver, 0xff, b'\x81\xF1', b'\x02')
-	if reply and reply[0:1] == b'\x02':
-		firmware += '.B' + hexlify(reply[1:3])
 	print ("  Firmware version: %s" % firmware)
-
+	print ("  Bootloader: %s" % bootloader)
-	reply = base.request(receiver, 0xff, b'\x81\xF1', b'\x04')
-	if reply and reply[0:1] == b'\x04':
-		bl_version = hexlify(reply[1:3])
-		print ("  Bootloader: %s.%s" % (bl_version[0:2], bl_version[2:4]))
 
 	print ("--------")