Assigning port no to ethernet module 812MJ's socket


Hello Sir ,
I wonder can socket be assigned any port no of our choice in 812MJ ethernet module ? I did this by assigning 502 to socket 0 but it failed to connect while if i am assigning socket 0 port no. as 80 i am able to connect , receive and send data .


Any port number can be assigned to the socket.
Do you use TCP server?
To debug this problem, you’d better use the Wireshark( and see what happen when you connect to the board.


I am getting RST signal in the wireshark when i use 502 port . what does it mean ? why it is not giving SYN flag .


RST means there is no socket having 502 port.
I think you need to check the port number is correct when you open the socket.


Hi ,
I tested wheather my socket gets assigned with other port no or not . ! and i found that any port no greater than 255 doesn’t get connected while port no <= 255 gets connected . I am using AX1 software from wiznets website , is there any limitation in this s/w or reason is something else ?


AX1 support any port number (~65535).
As the port number is 2 byte and you need to define it as Integer(2 byte) in your code.