code: def start_to(self, ip, tcpport=102):
          
          if tcpport != 102:
              logger.info("setting server TCP port to %s" % tcpport)
              self.set_param(snap7.snap7types.LocalPort, tcpport)
          assert re.match(ipv4, ip), '%s is invalid ipv4' % ip
          logger.info("starting server to %s:102" % ip)
          return self.library.Srv_Start(self.pointer, ip)
docs: start server on a specific interface.