diff --git a/oculus/WEB-INF/src/developer/OpenNIRead.java b/oculus/WEB-INF/src/developer/OpenNIRead.java
index 9b7e033..c8bdda2 100644
--- a/oculus/WEB-INF/src/developer/OpenNIRead.java
+++ b/oculus/WEB-INF/src/developer/OpenNIRead.java
@@ -9,6 +9,7 @@ public class OpenNIRead implements IObserver<ErrorStateEventArgs>{
 	private static Context context;
 	private static DepthGenerator depth;
 	private static DepthMetaData depthMD;
+	public boolean depthCamInit = false;
 	
 	@Override
 	public void update(IObservable<ErrorStateEventArgs> arg0,
@@ -24,16 +25,29 @@ public void startDepthCam(Application app) {
 
 		try 
 		{
-			OutArg<ScriptNode> scriptNodeArg = new OutArg<ScriptNode>();
-			context = Context.createFromXmlFile(SAMPLES_XML, scriptNodeArg);
-			OpenNIRead pThis = new OpenNIRead();
-			context.getErrorStateChangedEvent().addObserver(pThis);
-			depth = (DepthGenerator)context.findExistingNode(NodeType.DEPTH);
-			depthMD = new DepthMetaData();
+			if (depthCamInit == false) {
+				OutArg<ScriptNode> scriptNodeArg = new OutArg<ScriptNode>();
+				context = Context.createFromXmlFile(SAMPLES_XML, scriptNodeArg);
+				OpenNIRead pThis = new OpenNIRead();
+				context.getErrorStateChangedEvent().addObserver(pThis);
+				depth = (DepthGenerator)context.findExistingNode(NodeType.DEPTH);
+				depthMD = new DepthMetaData();
+				depthCamInit =true;
+			}
+			else { depth.startGenerating(); }
 		}
 		catch (Throwable e) { e.printStackTrace(); }
 	}
 	
+	public void stopDepthCam()  {
+		try {
+			depth.stopGenerating();
+		} catch (StatusException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+	}
+	
 	public int[] readHorizDepth() {
 		try {
 			context.waitAnyUpdateAll();
diff --git a/oculus/WEB-INF/src/oculus/Application.java b/oculus/WEB-INF/src/oculus/Application.java
index 5597575..f50042b 100755
--- a/oculus/WEB-INF/src/oculus/Application.java
+++ b/oculus/WEB-INF/src/oculus/Application.java
@@ -244,7 +244,6 @@ public void initialize() {
 			// moves.open(Settings.movesfile);
 			// new developer.EmailAlerts(this);
 			openNIRead = new developer.OpenNIRead();
-			openNIRead.startDepthCam(this);
 		}
 
 		// open socket last
@@ -663,6 +662,11 @@ public void playerCallServer(final PlayerCommands fn, final String str) {
 			}
 			messageplayer("holdservo " + str, null, null);
 			break;
+		case opennisensor:
+			if(str.equals("on")) { openNIRead.startDepthCam(this); }
+			else { openNIRead.stopDepthCam(); }			
+			messageplayer("openNI camera "+str, null, null);
+			break;
 		}
 	}
 
diff --git a/oculus/WEB-INF/src/oculus/FrameGrabHTTP.java b/oculus/WEB-INF/src/oculus/FrameGrabHTTP.java
index fd40ef6..535b2e4 100644
--- a/oculus/WEB-INF/src/oculus/FrameGrabHTTP.java
+++ b/oculus/WEB-INF/src/oculus/FrameGrabHTTP.java
@@ -75,6 +75,9 @@ private void frameGrab(HttpServletRequest req, HttpServletResponse res)
 	
 	private void radarGrab(HttpServletRequest req, HttpServletResponse res) 
 		throws ServletException, IOException {
+		
+		if (app.openNIRead.depthCamInit == false) { return; }
+		
 		//Util.log("getting frame depth info", this);
 		int[] xdepth = app.openNIRead.readHorizDepth();
 		//Util.log("depth map width = "+Integer.toString(horizDepthDistances.length));
diff --git a/oculus/WEB-INF/src/oculus/PlayerCommands.java b/oculus/WEB-INF/src/oculus/PlayerCommands.java
index 04d4968..8c63232 100644
--- a/oculus/WEB-INF/src/oculus/PlayerCommands.java
+++ b/oculus/WEB-INF/src/oculus/PlayerCommands.java
@@ -10,7 +10,7 @@ public enum PlayerCommands {
 	new_user_add, user_list, delete_user, extrauser_password_update, username_update, 
 	disconnectotherconnections, showlog, monitor, assumecontrol, softwareupdate, 
 	arduinoecho, arduinoreset, setsystemvolume, beapassenger, muterovmiconmovetoggle, spotlightsetbrightness, 
-	floodlight, writesetting, holdservo;
+	floodlight, writesetting, holdservo, opennisensor;
 
 	// sub-set that are restricted to "user0"
 	public enum AdminCommands {
diff --git a/oculus/index.html b/oculus/index.html
index a079f2d..262ca3e 100755
--- a/oculus/index.html
+++ b/oculus/index.html
@@ -866,8 +866,9 @@
 <table><tr><td style="height: 10px"></td></tr></table>
 Developer menu:<br>
 <table><tr><td style="height: 7px"></td></tr></table>
-
-radar <a class="blackbg" href="javascript: radar('on');">on</a> / 
+primesense sensor <a class="blackbg" href="javascript: radar('init');">on</a> / 
+<a class="blackbg" href="javascript: radar('shutdown');">off</a><br> 
+radar view <a class="blackbg" href="javascript: radar('on');">on</a> / 
 <a class="blackbg" href="javascript: radar('off');">off</a><br> 
 
 </div>
diff --git a/oculus/javascript/client.js b/oculus/javascript/client.js
index 4cfcce3..d6e9504 100755
--- a/oculus/javascript/client.js
+++ b/oculus/javascript/client.js
@@ -2160,24 +2160,36 @@ function displaymessages() {
 var radartimer = null;
 
 function radar(mode) {
-	if (mode=="on") {
+	if (mode=="init") {		
+		callServer("opennisensor", "on"); 
+		message("sending opennisensor on " + str, sentcmdcolor);
+		lagtimer = new Date().getTime(); // has to be *after* message()
+	}
+	if (mode=="on") {	
 		var v = document.getElementById("video");
 		var xy = findpos(v);
 		var x = xy[0]+v.offsetWidth;
 		var y=xy[1];
-		var str ="<img id='radarimg' src='frameGrabHTTP' alt='' onload='radarrepeat();' width='240' height='320'>"
-		popupmenu("context", "show", x, y, str, null, 1, 0);
+//		var str ="<img id='radarimg' src='frameGrabHTTP' alt='' onload='radarrepeat();' width='240' height='320'>"
+		var str ="<img id='radarimg' src='frameGrabHTTP?"+new Date().getTime()+"' alt='' onload='radarrepeat();' width='240' height='320'>"
+
+		popupmenu('context', 'show', x, y, str, null, 1, 0);
 	}
 	if (mode=="off") {
-		clearTimeout(radartimer);
+		lagtimer = new Date().getTime(); // has to be *after* message()
 		document.getElementById("radarimg").src="";
 		popupmenu("context", "close");
 	}
+	if (mode=="shutdown") { // unused
+		clearTimeout(radartimer);
+		callServer("opennisensor", "off");
+		message("sending opennisensor off " + str, sentcmdcolor);
+	}
 }
 
 function radarrepeat() {
 	clearTimeout(radartimer);
-	radartimer = setTimeout("document.getElementById('radarimg').src='frameGrabHTTP'; radarrepeat();", 100);
+	radartimer = setTimeout("document.getElementById('radarimg').src='frameGrabHTTP?"+new Date().getTime()+"'; radarrepeat();", 250);
 }