Netduino Plus 2 - Socket seems to depend on debug

Hi there,

I'm using the Netduino Plus 2 to intercept some tcp messages on port 9100, and it seems to work, at least most of the times when connected with the debugger.

A simple test can be done by using a browser with the following url: http://ip_address:9100

I'm using a blocking tcp socket, and the socket.accept() hangs until a request is sent - which should be fine.

This mostly works when connected with the debugger, but some times nothing is being accepted. When trying without the debugger connected, it never works.

A static ip is being used, and dhcp is turned of.

Anyone with any ideas?

Martin

Hi Martin

It would only be a guess but if it is working in the debugger and is not working without it then I would look at timing. The debugger introduces delays as it inspects the state of the device, handles Debug.Print (even in release mode), checks break points etc.

Without seeing your code I would guess that you are jumping straight from accept to reading how many bytes you have available. Without the debugger this could return zero or if you don't wait for the whole header to be received you won't get the full request. There are plenty of example web servers to look at if you Google Netduino Webserver but the 'standard' way is something like

Cheers

using (Socket client = clientSocket.Accept()){    Thread.Sleep(10);    int availableBytes = 0;    do    {        int bytes = client.Available - availableBytes;        if (bytes == 0)            break;        availableBytes += bytes;        Thread.Sleep(5);    } while (true);    if (availableBytes > 0)    {....    }

Hi,

i really stripped down my project - to pretty much a copy of the suggest code, but stil a lot of problems.

Know even then ping of the dut will fail in debug mode - I have tried a complete erase of the netduino and a new flash of the firmware, but stil the problem exists.

I did fill in the correct mac address and ip address after the complete erase.

Any ideas?

Martin

Hi,

 

i really stripped down my project - to pretty much a copy of the suggest code, but stil a lot of problems.

 

Know even then ping of the dut will fail in debug mode - I have tried a complete erase of the netduino and a new flash of the firmware, but stil the problem exists.

 

I did fill in the correct mac address and ip address after the complete erase.

 

Any ideas?

 

Martin

Paste your code, its nearly impossible to help you without seeing you code