1 reply to this topic

[J-zY]

Hello everyone,

For the last week i've been trying to get this http://www.sparkfun.com/products/9607 shield working. This is my code:

   public static void Main()
        {
            // write your code here
            SerialPort serialPort = new SerialPort(SerialPorts.COM2, 9600);

            serialPort.Open();

            while (true)
            {

                int bytesToRead = serialPort.BytesToRead;

                if (bytesToRead > 0)
                {
                    // get the waiting data

                    byte[] buffer = new byte[bytesToRead];

                    serialPort.Read(buffer, 0, buffer.Length);

                    // print out our received data

                    Debug.Print(new String(System.Text.Encoding.UTF8.GetChars(buffer)));

                }



                Thread.Sleep(100); 
            }

        }

I'm powering it with 9v external power and it turns on and I can call it, but it wont print anything. The netduino doesn't reveive any data.

Can somebody tell me what I'm doing wrong?

Edited by Stefan, 24 September 2011 - 12:22 PM.
Added [code]-tags

[Mario Vernari]

Welcome J-zY...usernames always more complex...

You missed to add some info about your experiment. For instance, how did you wire the shield to your Netduino: that is important. Since you declared to use the COM2, you should have used the I/Os number 2 and 3.

Moreover, your program is always reading for incoming data. But what kind of data are your expecting?
If you take a look at the shield application example (sketch), it act a trivial loopback by writing a byte and listening for it. However, that is much like making a short across the I/Os, and nothing more.

If you want to make something funnier, you should try to send AT commands to the shield.
The very first command I would post is:
ATV1E0
(followed by a CR)
This turns on the Verbose mode, and turns off the Echo (i.e. the loopback).

Try these basic steps, then turn to something more complex.
Cheers