WIP - microphone in use detection

Delcom/Delcom.cs

@@ -154,7 +154,7 @@ namespace WorkIndicator.Delcom
         {
             try
             {
-                if (!_deviceHandle.IsClosed)
+                if (_deviceHandle != null && !_deviceHandle.IsClosed)
                     _deviceHandle.Close();
 
                 return 0;

Delcom/StoplightIndicator.cs

@@ -1,6 +1,6 @@
-using System;
-
-using Common.Extensions;
+using Common.Extensions;
+using System;
+using System.Diagnostics;
 
 namespace WorkIndicator.Delcom
 {
@@ -80,6 +80,8 @@ namespace WorkIndicator.Delcom
             _yellow = yellow;
             _green = green;
 
+            Debug.WriteLine($"Red: {_red}, Yellow: {_yellow}, Green: {_green}");
+
             port1 = port1.SetBitValue((int) Light.Green, green == LightState.Off);
             port1 = port1.SetBitValue((int) Light.Yellow, yellow == LightState.Off);
             port1 = port1.SetBitValue((int) Light.Red, red == LightState.Off);