213 replies to this topic

[NeonMika / Markus VV.]

it's just a small mistake in your url.

Look at the thread starting post, there you find a list of methods...


Quote:


switchDigitalPin
> [ipnetduino]/switchDigitalPin?pin=[0-13]
setDigitalPin
> [ipnetduino]/setDigitalPin?pin=[0-13]&state=[true|false]




Some time ago i added the "digital" word to the command, try it with this... And if you are still learning, have a look at "breakpoints" and step by step debugging (f10) in visual studio. This really helps finding code mistakes.

Greets, markus

[CT1]

Thanks for the update, with that change keyed into the address bar, It Works. Maybe I have a version of your project before you made this change. Where do I look to see what version of your code I'm executing? Either way I'm gonna download & try it again. The code I displayed back to you was from your original code and the documentation also shows it without the word Digital. Again thank you for putting this together

[NeonMika / Markus VV.]

I updated the code and uploaded it.

Now the index-pages shows the possible commands to make things a little more clear: Just call your Netduinos IP

I cannot reproduce your problem, i have no SD card here But I hope it helps to call a RequestArguments.Client.Close()...

A also had the problem with a not-responding server 1 week ago. But it was not the servers fault, it was the clients.

Here is the code that I use to send commands to the Netduino:

try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(server + "/switchDigitalPin?pin=" + pin);
                using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
                {                    
                    return true;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return false;
            }

You need to use the "using" because sometimes (espacially if you send requests often and fast) your HttpWebResponse doesn't get "deconstructed" (was this the right term?). But this HAS to be done, otherwise the underlying Socket will keep blocking your new HttpWebRequest.

I hope there was something that could help you.

Greets,

Markus

[NeonMika / Markus VV.]

Probably the .Send on a closed Socket "shoots" the Netduino.

I now added a check if the Socket is still open. It looks like that:

protected bool SocketConnected(Socket s)
        {
            bool part1 = s.Poll(1000, SelectMode.SelectRead);
            bool part2 = (s.Available == 0);
            if (part1 & part2)
                return false;
            else
                return true;
        }

I uploaded it, so you can try it. Now the server should recognise, that the socket is closed and should avoid the exception.

Greets, Markus

[NeonMika / Markus VV.]

Sorry, seems like there was a problem with the upload, it will be up in 1 minute

[GrZeCh]

Hello, can you give me a little hint how I can connect and POST some text to remote IP address from Netduino+ without any request from outside (I want to use netduino to sent some request when motion sensor will discover movement or temperature will change)? Regards

[NeonMika / Markus VV.]

Netduino has some helper classes like HttpWebRequest etc., but i would suggest you to use Sockets. To send a POST from Netduino to a server just create a Socket, bind it to the server's IP, and use mySocket.Write(...) to send the data. Have a look at the wiki-page http://de.wikipedia....tocol#HTTP_POST to get some knowledge of http (if you don't have it already ) Greats, Markus

[gnomathibus]

Hello, Neon Mika.Webserver is really good if I try to send the entire contents of an array to xml, is this possible?

[NeonMika / Markus VV.]

For sure!

Just use some code similar to the following:

private void SendMyArray(RequestReceivedEventArgs e, Hashtable results)
{

int[] myArr = new int[]{11,13,2};
for(int i = 0; i < myArr.Length; i++)

 {
results.Add("value"+i, myArr[i]);

 }
 }

Then you need to add the method to your webserver:

WebServer.AddResponse(new XMLResponse("sendmemyarray", new XMLResponseMethod(SendMyArray)));

Now you can call your webserver method via

http://192.168.0.2/sendmemyarray

//or whatever ip your netduino has

[gnomathibus]

thank you very much for your answer it works, but with a Multidimensional Array how to?

[NeonMika / Markus VV.]

just use 2 for-loops in each other....

private void SendMyArray(RequestReceivedEventArgs e, Hashtable results)
{

for(int row = 0; row < myArr.GetLength(1); row++)
 {
for(int col = 0; col < myArr.GetLength(0); col++)
{
 results.Add("value_"+row+"_"+col, myArr[row,col]); 
}
 }
 }

[gnomathibus]

ok my result is : <Response> <value_26>0</value_26> <value_10>0</value_10> <value_5>0</value_5> </Response> but I would have <Response> <id>26</id> <value>0</value> </Response> <Response> <id>10</id> <value>0</value> </Response> <Response> <id>26</id> <value>0</value> </Response>

[NeonMika / Markus VV.]

Thank you for using Neonmika.Webserver. I sat down this night to develop a Little XML library which allows nested XML tags, Supports Arrays and hashtables, and a Little more. I will Post another reply when i uploaded the New Version, have to do some more debugging and speeding up Greets Markus

[NeonMika / Markus VV.]

Here we go!
I am proudly presenting my little XML "library". So now you have support for nested XML.
Have a look at the following code to get a litte overview:

/// <summary>
        /// Example for the useage of the new XML library
        /// Use the hashtable if you don't need nested XML (like the standard xml responses)
        /// If you need nested XML, use the XMLPair class. The Key-parameter is String.
        /// As value the following types can be used to achieve nesting: XMLPair, XMLPair[] and Hashtable
        /// </summary>
        /// <param name="e"></param>
        /// <param name="h"></param>
        /// <returns></returns>
        private void MultipleXML(RequestReceivedEventArgs e, Hashtable returnHashtable)
        {
            returnHashtable.Add("UseTheHashtable", "If you don't need nested XML");

            XMLPair[] Phones = new XMLPair[2];
            Phones[0] = new XMLPair("Phone");
            Phones[1] = new XMLPair("Phone");

            XMLPair[] PhoneAttributes0 = new XMLPair[2];
            PhoneAttributes0[0] = new XMLPair("Type", "Nokia");
            PhoneAttributes0[1] = new XMLPair("AvailableColours", new XMLPair[] {new XMLPair("Colour","Cyan"), new XMLPair("Colour","Black")});
            Phones[0].Value = PhoneAttributes0;

            XMLPair[] PhoneAttributes1 = new XMLPair[2];
            PhoneAttributes1[0] = new XMLPair("Type", "HTC");
            PhoneAttributes1[1] = new XMLPair("AvailableColours", new XMLPair("Colour", "Grey"));
            Phones[1].Value = PhoneAttributes0;

            returnHashtable.Add("Phones", Phones);
        }

The above code will produce the following XML:

<!--XML created by NeonMika Webserver-->
<Response>
<Phones>
<Phone>
<Type>
Nokia
</Type>
<AvailableColours>
<Colour>
Cyan
</Colour>
<Colour>
Black
</Colour>
</AvailableColours>
</Phone>
<Phone>
<Type>
Nokia
</Type>
<AvailableColours>
<Colour>
Cyan
</Colour>
<Colour>
Black
</Colour>
</AvailableColours>
</Phone>
</Phones>
<UseTheHashtable>
If you don't need nested XML
</UseTheHashtable>
</Response>

If you have questions feel free to ask

Greets, Markus

[gnomathibus]

hello, great reactivity! I just tried the test code "multixml" but I get the following error in the debuger when I call to the function / multixml: customer connected Final byte count: 315 Request URL = multixml Start checking Requests A first chance exception of type 'System.Exception' Occurred in NeonMika.XML.dll WAS thrown exception: System.Exception

[NeonMika / Markus VV.]

Puh, I'm not at home today and tomorrow, so I can't look into it... Probably you can find the error by setting a breakpoint and walk step by step (F10 and F11) and watch in which line the exception is thrown. I will look for the error asap. I'm really sorry, i tested it before uploading (it worked on my N+). Greets, Markus