/// Connect to selected client
/** Parameter "URL" must be either "DEVICE" or "SIMULATOR". No other inputs supported for now.
* Simulator and device URLs hard-coded into controller. Support for other URLs can be added later.
* <param name="URL">"SIMULATOR" or "DEVICE"</param>
*/
public void connectClient(string URL)
{
// Physical device if selected
if (URL == "DEVICE")
{
this.URL = DEVICE_URL;
}
// Simulator by default
else
{
this.URL = SIMULATOR_URL;
}
// Try connecting to client
try
{
simulatorParams = new Tut.MppOpcUaClientLib.MppClient.MppClientCtorParams(this.URL);
client = new Tut.MppOpcUaClientLib.MppClient(simulatorParams);
startListener();
assignUnits();
//Handle exception if failed
} catch (Exception e)
{
Console.WriteLine("------- ERROR CONNECTING--------");
Console.WriteLine(e);
Console.WriteLine("------- --------");
throw;
}
}
/// <summary>
/// Connect to the system and subscribe to listen for changes in values. Base code from course material
/// </summary>
/// <param name="url">URL for the system to be connected to</param>
public void connect(string url)
{
try
{
// Create a new MPP client instance
var ctorParams = new UaLib.MppClient.MppClientCtorParams(url);
m_mppClient = new UaLib.MppClient(ctorParams);
// Signing up for events
m_mppClient.ProcessItemsChanged +=
m_mppClient_ProcessItemsChanged;
// Adding process items to subscription.
// A ProcessItemsChanged event will instantly be raised after
// addToSubscription() has been called!
m_mppClient.ConnectionStatus += M_mppClient_ConnectionStatus;
foreach (var key in INT_ITEMS)
{
m_mppClient.addToSubscription(key);
}
foreach (var key in BOOL_ITEMS)
{
m_mppClient.addToSubscription(key);
}
foreach (var key in DOUBLE_ITEMS)
{
m_mppClient.addToSubscription(key);
}
}
catch (Exception e)
{
// Handle the exception...
Console.WriteLine("Error connecting listener: " + e.Message);
}
}
