added killAllConnections() function to provide an easy fix to an error that...

added killAllConnections() function to provide an easy fix to an error that occured when trying to connect to a brick with an already established connection to another EV3 object

source/EV3.m

@@ -172,20 +172,11 @@ classdef EV3 < MaskedHandle
             %
             % See also ISCONNECTED / :attr:`isConnected`
             
-            % save variables of base directory in vars
-	    vars = evalin('base', 'whos');
-	    for k = 1:length(vars)
-		% if another EV3 object exists, preemptively disconnect it to prevent connection error
-		if strcmp(vars(k).class, 'EV3')
-		    evalin('base', [vars(k).name '.disconnect()'])
-		end
-	    end
             
             if ev3.isConnected
                 if isCommInterfaceValid(ev3.commInterface)
-                    % Warning lead to confusion of students. Since brick connection is still working
-		            % even if calling connect() multiple times, it is disabled. 
-		            % warning('EV3::connect: Already connected. Resetting connection now...');
+                    
+		            warning('EV3::connect: Already connected. Resetting connection now...');
                     ev3.disconnect();
                 else
                     warning(['EV3::connect: EV3.isConnected is set to ''True'', but ',...
@@ -235,6 +226,22 @@ classdef EV3 < MaskedHandle
             end
         end
 
+
+	function killAllConnections(ev3)
+	    % Disconnects all existing EV3-object and its Motors and Sensors (within base workspace) from physical bricks.
+
+	    % save variables of base directory in vars
+	    vars = evalin('base', 'whos');
+	    for k = 1:length(vars)
+		% if another EV3 object exists, preemptively disconnect it to prevent connection error
+		if strcmp(vars(k).class, 'EV3')
+		    evalin('base', [vars(k).name '.disconnect()'])
+		end
+	    end
+	end
+
+
+
         function disconnect(ev3)
             % Disconnects EV3-object and its Motors and Sensors from physical brick.
             %