transfer timeout to protocol object. (#1275)

transfer timeout to protocol object.

Author: janiversen

pymodbus/client/serial.py

@@ -88,7 +88,9 @@ async def close(self):  # pylint: disable=invalid-overridden-method
 
     def _create_protocol(self):
         """Create protocol."""
-        protocol = ModbusClientProtocol(framer=self.params.framer, xframer=self.framer)
+        protocol = ModbusClientProtocol(
+            framer=self.params.framer, xframer=self.framer, timeout=self.params.timeout
+        )
         protocol.factory = self
         return protocol