Unity 4 (Mac) + Arduino : unity mac IOException: No such file or directory

[jim_bbq]

Dear all

I wonder if anyone has experienced the problem on Mac. I tried to use Arduino to communicate with Unity 4 (just a simple test sending a sensor value to Unity via serial communication).

It works perfectly fine on Windows, but on Mac, I got "IOException: No such file or directory " error.

Any idea how to solve this issue?

thanks!
Jim

[pcace]

Same Problem here!
This is the code im using on the Unity Side:

using UnityEngine;
using System.Collections;
using System.IO.Ports;

public class MoveSphere : MonoBehaviour
{

public float speed;

private float amountToMove;

SerialPort sp = new SerialPort(“COM3”, 9600);
void Start (){

sp.Open ();
sp.ReadTimeout = 1;

}

void Update (){
amountToMove = speed * Time.deltaTime;

if (sp.IsOpen) {
try {

MoveObject(sp.ReadByte());
print(sp.ReadByte());
}
catch (System.Exception){
}
}

}

void MoveObject (int Direction)
{
if (Direction == 1){
gameObject.transform.localScale += new Vector3(0,0,0.1f);
}

if (Direction == 2){
gameObject.transform.localScale += new Vector3(0,0,-0.1f
}

}
}

and this on the Arduino side:

void setup()
{
Serial.begin(9600);

}

void loop()
{
Serial.println(1);
Serial.flush();
delay(1000);
Serial.println(2);
Serial.flush();
delay(1000);
}

both are just little tests, but i simply cannot get it to run!

Any idea would be great!!

Thanks!!

[lucymcloughlin]

Open your Terminal and search ls /dev/tty.* to find the serial port for your Arduino. It will look something like /dev/tty.usbmodem1411. Then replace COM3 in the above script with /dev/tty.usbmodem1411 or whatever your search showed.

You should also make sure that you’ve changed the below setting;
Edit > Project Settings > Player > Other Settings > Api Compatibility Level > NET 4.x.

[sardaar]

@lucymcloughlin

Open your Terminal and search ls /dev/tty.* to find the serial port for your Arduino. It will look something like /dev/tty.usbmodem1411. Then replace COM3 in the above script with /dev/tty.usbmodem1411 or whatever your search showed.

You should also make sure that you’ve changed the below setting;
Edit > Project Settings > Player > Other Settings > Api Compatibility Level > NET 4.x.

i was really stuck in the project and then tried your answer it really helped
thanks alot lucymcloughlin

[bahrulum17]

@sardaar

i was really stuck in the project and then tried your answer it really helped
thanks alot lucymcloughlin

are you using /dev/tty.usbmodem or /dev/cu.usbmodem ?

Thanks!!