@whale-av Thanks again.Many apps(ipad,pc mac)have been developed to do that. I wonder PD can do that.

@whale-av Thanks,but this is what I mean~the source port, not the destination port mentioned by the help menu. This port number is randomly choosed by PD,and
changes every time you connect or reconnect the UDP communication. Just wonder how to specify that number ,or make it a fixed port number,or any solution? I searched alot ,no luck.

@whale-av Many thanks for your attention! Normally say, using object like [udpsend],you can specify the destination ip+destination port by specifying the provided arguement. But in my case,I need to know which port is used for sending out udp packages. However,this port is specified randomly within every connection is made. I search alot online,but found no cue

can't specify udp
soure port