More tries to open a connection

TCP/IP Chip W5100
1

Hello,

I have again a problem with my W5100 on the arduino 328P board.
When I connect to my own TCP-Server written in C#, then the Webclient connects at the first try.
But when I want to connect to my webserver, my client connects only after several (5- 15) tries.
I don´t no what the problem is, can somebody help me?

greets

2

Hi,

Could you post packet capture file with like wireshark??

It could help analyze problem.

Best regards.

3

hi,

here is the file.
You have to filter by “ip.src==192.168.1.10 || ip.dst==192.168.1.10”
I hope you can find the error.

Edit: Can it be that the problem is the wrong port? I use port 23456
Which port should i use instead?

greets
w5100.zip (585 KB)

4

Hi,

I think 192.168.1.153 is server.

If, client send SYN packet but cannot receive response packet(SYN-ACK).
So, client send retransmission packet.

Please, check server program and then let me know why server doesn’t send response.

Best regards.

5

Hi,

[quote]Edit: Can it be that the problem is the wrong port? I use port 23456
Which port should i use instead?[/quote]

When you do implement as client, you should be random port number as source port number.
When you fix the source number, Next connection can’t established.

Thank you.