osx usb communication error.

[Thai Ho]

Hi All,

I am very new to Monobrick. I have been trying to connect to ev3 via usb without any success. I am testing this on OSX 10.9 running on Xamarin Studio 4.2.1. I also added monobrick.dll, LibUsbDotNet.dll to the references:
I also copied all of the files from Monobrick to the bin/debug folder.

I have been trying to get this to work in the last week. Finally I am resourcing to this forum for help.
Thank you if anyone can point out what I am missing to get the USB connection to work.

This is my sample program:

using System;
using MonoBrick.EV3;

namespace ev3
{
class MainClass
{
public static void Main (string[] args)
{

var ev3 = new Brick<Sensor,Sensor,Sensor,Sensor>(“usb”);

try{
ev3.Connection.Open();
ev3.MotorA.On(50);
System.Threading.Thread.Sleep(3000);
ev3.MotorA.Off();
}
catch(Exception e){
Console.WriteLine(e.StackTrace);
Console.WriteLine(“Error: ” + e.Message);
Console.WriteLine(“Press any key to end…”);
Console.ReadKey();
}
finally{
ev3.Connection.Close();
}
}
}
}

Below is the terminal print out error:

at MonoBrick.HidLib`2[MonoBrick.EV3.Command,MonoBrick.EV3.Reply].Open () [0x00000] in <filename unknown>:0
at MonoBrick.USB`2[MonoBrick.EV3.Command,MonoBrick.EV3.Reply].Open () [0x00000] in <filename unknown>:0
at ev3.MainClass.Main (System.String[] args) [0x00013] in /Users/Thai/Desktop/EV3/EV3/Program.cs:15
Error: Failed to open connection
Press any key to end…

Press any key to continue…

[Thai Ho]

Here is my sample file that I can’t get it to work.

[Thai Ho]

I finally got it running the test application on my window XP.
It was my mistake. I had the brick boot with MonoBrick Firmware.

I didn’t realized that I can just use Lego Firmware with the test application.

[Anders Søborg]

Ok

That is great. Thanks for posting that everything is ok…

Anders

[Author]

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