How can I send numbers and variables to my arduino?

[timeylies]

Here is the script:
/**

• Ardity (Serial Communication for Arduino + Unity)
• Author: Daniel Wilches dwilches@gmail.com
• This work is released under the Creative Commons Attributions license.
• https://creativecommons.org/licenses/by/2.0/
  */

using UnityEngine;
using System.Collections;
using UnityEditor;

/**

• Sample for reading using polling by yourself, and writing too.
  */
  public class SampleUserPolling_ReadWrite : MonoBehaviour
  {
  public SerialController serialController;
  public string speed;

  // Initialization
  void Start()
  {
  serialController = GameObject.Find("SerialController").GetComponent();

  }

  // Executed each frame
  void Update()
  {

   //---------------------------------------------------------------------
   // Send data
   //---------------------------------------------------------------------
  
  
   speed = Car_Controller.speed1.ToString("D5");
   serialController.SendSerialMessage(speed);
   
  
  
  
   //---------------------------------------------------------------------
   // Receive data
   //---------------------------------------------------------------------
  
   string message = serialController.ReadSerialMessage();
  
   if(message == "P")
   {
       EditorApplication.isPlaying = false;
   }
  
   if (message == null)
       return;
  
   // Check if the message is plain data or a connect/disconnect event.
   if (ReferenceEquals(message, SerialController.SERIAL_DEVICE_CONNECTED))
       Debug.Log("Connection established");
   else if (ReferenceEquals(message, SerialController.SERIAL_DEVICE_DISCONNECTED))
       Debug.Log("Connection attempt failed or disconnection detected");
   else
       Debug.Log("Message arrived: " + message);
  

  }
  }

Im trying to send my car speed to my arduino so it can display it to a lcd

[dwilches]

Hello,

On the receiving end, your numbers will be strings, so you need to find out how to convert a string to a number in C#. That's not specific to Ardity, but C#, look for a method that mentions "parsing" a string as a number. StackOverflow is a good place to find an answer to this.

Regards.