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[mijnendatum]

Hi all,

I just received my Netduino Plus today and I have already started working on my project.
For this project I am using the Parallax RFID Read/Write Module, Serial (#28440) (http://www.parallax....dWrite-v1.0.pdf) and a Serial LCD module I got from SparkFun.

I already managed to get the LCD display working but I can't seem to get the RFID to read the tags.
I am currently using the following code:

        static SerialLCD lcd = new SerialLCD();
        static SerialPort rfid = new SerialPort(SerialPorts.COM2, 9600, Parity.None, 8, StopBits.One);

        public static void Main()
        {
            lcd.ClearDisplay();
            rfid.DataReceived += new SerialDataReceivedEventHandler(rfid_DataReceived);
            
            while (true)
            {
                byte[] command = new byte[] { (byte)'!', (byte)'R', (byte)'W', 0x01, 0x32 };
                rfid.Write(command, 0, command.Length);

                Thread.Sleep(5000);
            }
        }

        static void rfid_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            byte[] msg = new byte[5];
            ((SerialPort)sender).Read(msg, 0, msg.Length);

            if (msg[0] == 0x01)
            {
                lcd.ClearDisplay();
                lcd.Write(msg[1]);
                lcd.Write(msg[2]);
                lcd.Write(msg[3]);
                lcd.Write(msg[4]);
            }
            else if (msg[0] == 0x02)
            {
                lcd.ClearDisplay();
                lcd.Write("Did not find a listen window");
            }
            else if (msg[0] == 0x03)
            {
                lcd.ClearDisplay();
                lcd.Write("Could be invalid command");
            }
            else if (msg[0] == 0x04)
            {
                lcd.ClearDisplay();
                lcd.Write("Sending old password");
            }
            else if (msg[0] == 0x05)
            {
                lcd.ClearDisplay();
                lcd.Write("Sending new password");
            }
            else if (msg[0] == 0x06)
            {
                lcd.ClearDisplay();
                lcd.Write("No Listen Window after new passw");
            }
            else if (msg[0] == 0x07)
            {
                lcd.ClearDisplay();
                lcd.Write("Parity error reading data");
            }
        }

I never seem to get a returning message that starts with the 0x01 byte...

Could anyone see whether I am making some big or small mistake here?