SerialPorts.GetPortNames error

Questions & Answers
1

I seem to be getting some form of problem with using the SerialPorts.GetPortNames() function.

I want to get a list of the available ports and print them out on the console. I am aware that my ports are there because I’m testing them on Arduino so I know what kind of output I should receive.

I current have;

foreach(string str in SerialPort.GetPortNames())
		{
			Debug.Log(String.Format(str));
		}

But there is no output, anybody know why?

Edit: I’m using OS X if that helps

3

I have written an alternative for OS X users who wish to use SerialPorts.GetPortNames(), instead of calling this function, OS X users can simply use the method script.

void getPortNames ()
	{
		int p = (int)Environment.OSVersion.Platform;
		List<string> serial_ports = new List<string> ();
		
		// Are we on Unix?
		if (p == 4 || p == 128 || p == 6) {
			string[] ttys = Directory.GetFiles ("/dev/", "tty.*");
			foreach (string dev in ttys) {
				if (dev.StartsWith ("/dev/tty.*"))
					serial_ports.Add (dev);
				Debug.Log (String.Format (dev));
			}
		}
	}

In the GetPortNames function, it looks for ports that begin with “/dev/ttyS” or “/dev/ttyUSB” . However, OS X ports begin with “/dev/tty.”.

The Debug.Log will print out each of the available ports for you.

Thank you to Eroteme for showing me Mono SerialPort.cs.

2

The method is implemented in the Mono SerialPort.cs. It works as expected on my computer.

If you’re on Windows, perhaps you should double-check if the registry key HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM contain elements.