Assigning port no to ethernet module 812MJ's socket

Question

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 .

jbkim · Answer

Any port number can be assigned to the socket. Do you use TCP server? To debug this problem, you’d better use the Wireshark([url]http://www.wireshark.org/[/url])) and see what happen when you connect to the board.

prashantkumar · Answer

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

jbkim · Answer

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.

prashantkumar · Answer

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 ?

jbkim · Answer

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.