private bool AutoDetectArduino()
    {
        ManagementScope connectionscope = new ManagementScope();

        SelectQuery serialQuery = new SelectQuery("SELECT * FROM Win32_SerialPort");

        ManagementObjectSearcher searcher = new ManagementObjectSearcher(connectionscope, serialQuery);

        bool weturn = false;

        try
        {

            foreach (ManagementObject item in searcher.Get())
            {
                string desc = item["Description"].ToString();
                string deviceid = item["DeviceID"].ToString();

                if (desc.Contains("USB Serial Device"))
                {
                    sp.Close();
                    sp.PortName = deviceid;

                    weturn = true;
                }
                else
                {
                    weturn = false;
                }
            }

        }
        catch (ManagementException e)
        {

        }

        return weturn;
    }

    string[] generalarray = new string[3];

    public void readArduinoLightData()
    {
        AutoDetectArduino();
        try
        {
            if (!sp.IsOpen)
            {
                sp.Open();
            }

            sp.Parity = Parity.None;
            sp.StopBits = StopBits.One;
            sp.Handshake = Handshake.None;

            sp.ReadTimeout = 10000;

            sp.DataReceived += new SerialDataReceivedEventHandler(datareceive);
        }
        catch
        {

        }
    }


    private void datareceive(object sender, SerialDataReceivedEventArgs e)
    {

            for (count = 0; count < generalarray.Length; count++)
            {
                generalarray[count] = sp.ReadLine();
            }

            temperature =Convert.ToDouble(generalarray[0]);
            light = Convert.ToDouble(generalarray[1]);
            currentvolt = Convert.ToDouble(generalarray[2]);
        }