Use source_address in serial.

Author: janiversen

pymodbus/transport/transport.py

@@ -176,7 +176,7 @@ def init_setup_connect_listen(self) -> None:
             self.call_create = lambda: create_serial_connection(
                 self.loop,
                 self.handle_new_connection,
-                self.comm_params.host,
+                self.comm_params.source_address[0],
                 baudrate=self.comm_params.baudrate,
                 bytesize=self.comm_params.bytesize,
                 parity=self.comm_params.parity,