@@ -82,8 +82,25 @@ var setListeners = func {

                     flightdeck[c].map.layers.route.onCurrentWaypointChange(props.globals.getNode('/autopilot/route-manager/current-wp')),

                 0, 1);

-    prop = zkv.getPath() ~ '/serviceable';

-    data.listeners[prop] = setlistener(prop, func (n) if (!n.getValue()) zkv1000.powerOff, 0, 0);

+    if (zkv.getChild('serviceable') != nil) {

+        prop = zkv.getPath() ~ '/serviceable';

+        data.listeners[prop] = setlistener(prop,

+                func (n) {

+                    var type = n.getType();

+                    if (type == 'BOOL') {

+                        if (n.getBoolValue())

+                            zkv1000.powerOn();

+                        else

+                            zkv1000.powerOff();

+                    }

+                    elsif (type == 'INT' or type == 'LONG' or type == 'FLOAT' or type == 'DOUBLE') {

+                        if (n.getValue() > 12)

+                            zkv1000.powerOn();

+                        else

+                            zkv1000.powerOff();

+                    }

+                }, 0, 0);

+    }

     # the timer isn't necessary anymore

     data.timers.listeners.stop();

@@ -186,30 +203,57 @@ var deviceClass = {

         return m;

     },

     off: func {

+        var name = me.name;

         foreach (var timer; keys(me.timers)) {

             me.timers[timer].stop();

             delete(me.timers, timer);

         }

         foreach (var member; keys(me)) {

-            if (contains(me[member], 'off')) me[class].off();

+            if (member == 'parents')

+                continue;

+            if (contains(me[member], 'parents')) {

+                if (contains(me[member].parents[0], 'new')

+                and typeof(me[member].parents[0].new) == 'func') {

+                    if (contains(me[member].parents[0], 'removeAllChildren')

+                    and !contains(me[member].parents[0], 'setVisible')) # this one is a props node, but not canvas

+                        me[member].removeAllChildren();

+                    elsif (contains(me[member].parents[0], 'off')

+                    and typeof(me[member].parents[0].off) == 'func')

+                        me[member].off();

+                }

+            }

+        }

+        foreach (var member; keys(me)) {

+            if (member == 'parents')

+                continue;

             delete(me, member);

         }

+        zkv.getNode(name).setValue('status', 0);

+        msg(name ~ ' switched off');

     },

 };

 var powerOff = func {

-    foreach (var listener; keys(data.listeners))

+    foreach (var listener; keys(data.listeners)) {

+        if (listener == '/instrumentation/zkv1000/serviceable')

+            continue;

         removelistener(data.listeners[listener]);

+        delete(data.listeners, listener);

+    }

     foreach (var timer; keys(data.timers)) {

         data.timers[timer].stop();

+        if (timer == '20Hz' or timer == '1Hz')

+            continue;

         delete(data.timers, timer);

     }

+    foreach (var k; keys(autopilot))

+        delete(autopilot, k);

+

     foreach (var name; keys(flightdeck)) {

         flightdeck[name].off();

-        delete(flightdeck, name);

-        setprop(zkv.getPath() ~ '/' ~ name ~ '/status', 0);

+        flightdeck[name] = nil;

     }

 }

@@ -219,22 +263,26 @@ var powerOn = func {

         return;

     }

-    if (contains(data.listeners, 'autopower'))

-        removelistener(data.listeners.autopower);

+    if (contains(data.listeners, '/instrumentation/zkv1000/serviceable')) {

+        removelistener(data.listeners['/instrumentation/zkv1000/serviceable']);

+        delete(data.listeners, '/instrumentation/zkv1000/serviceable');

+    }

     foreach (var freq; keys(data.timers))

         data.timers[freq].start();

     foreach (var name; keys(flightdeck))

         if (zkv.getNode(name) != nil)

+            if (zkv.getNode(name).getValue('status') == nil or zkv.getNode(name).getValue('status') == 0)

 #            thread.newthread(func {

                 flightdeck[name] = deviceClass.new(name);

 #            });

-    autopilot = APClass.new();

+    if (! contains(autopilot, 'parents'))

+        autopilot = APClass.new();

     if (! contains(data.timers, 'listeners')) {

-        data.timers.listeners = maketimer(5, setListeners);

+        data.timers.listeners = maketimer(1, setListeners);

         data.timers.listeners.singleShot = 1;

         data.timers.listeners.start();

     }

@@ -306,12 +306,33 @@ var displayClass = {

 #}}}

     off: func {

-        foreach(var timer; keys(me.timers2)) {

-            me.timers2[timer].stop();

-            delete(me.timers2, timer);

+        me.parents[0]._updateRadio = func; # because of the settimers...

+        me.parents[0].updateEIS = func;

+        foreach(var timer; keys(me.timers)) {

+            me.timers[timer].stop();

+            delete(me.timers, timer);

         }

-        me.screen.del();

-        me.display.del();

+        foreach (var e; keys(me.screenElements)) {

+            if (typeof(me.screenElements[e]) != 'nil')

+                me.screenElements[e].hide();

+            delete(me.screenElements, e);

+        }

+        foreach (var e; keys(me.screenElements)) {

+            if (typeof(me.screenElements[e]) != 'nil')

+                me.screenElements[e].hide();

+            delete(me.screenElements, e);

+        }

+        foreach (var e; keys(me.screenElements)) {

+            if (typeof(me.screenElements[e]) != 'nil')

+                me.screenElements[e].hide();

+            delete(me.screenElements, e);

+        }

+        me.screen.setVisible(0);

+        settimer(func {

+                me.screen.removeAllChildren();

+                me.screen.del();

+                me.display.del();

+        }, 0.1);

     },

 # temporary Widget Display for HDG and CRS modification {{{

@@ -78,6 +78,13 @@ var mapClass = {

         return m;

     },

+    off: func {

+        me.mapOrientation.setVisible(0);

+        foreach (var layer; keys(me.layers)) {

+            me.layers[layer].off();

+            delete(me.layers, layer);

+        }

+    },

     changeZoom : func (d = 0) {

         me.device.data.zoom = math.max(2, math.min(19, me.device.data.zoom + d));

         me.device.data['range-nm'] = me.device.display.display.get('view[1]') / 2 * 84.53 * math.cos(data.lat) / math.pow(2, me.device.data.zoom);

@@ -403,6 +403,10 @@ var MapNavaids = {

         return m;

     },

+    off: func {

+        me._group.setVisible(0);

+        me._group.removeAllChildren();

+    },

     update : func {

         me._group._node.getNode('ref-lat', 1).setDoubleValue(data.lat);

         me._group._node.getNode('ref-lon', 1).setDoubleValue(data.lon);

@@ -219,6 +219,11 @@ var MapRoute = {

         return m;

     },

+    off: func {

+        me.setVisible(0);

+        me.group.setVisible(0);

+        me.group.removeAllChildren();

+    },

     update: func {

         me.visibility != 0 or return;

         me.group._node

@@ -96,6 +96,10 @@ var MapTcas = {

         return m;

     },

+    off: func {

+        me.setVisible(0);

+    },

+

     update : func() {

         if (me.device.data.tcas == 0)

             return;

@@ -34,6 +34,12 @@ var MapTiles = {

         return m;

     },

+    off: func {

+        me.group.setVisible(0);

+        me.group.removeAllChildren();

+        me.group.del();

+    },

+

     setVisible : func (v) {

         if (v != me.visibility) {

             me.visibility = v;

@@ -8,6 +8,11 @@ var pageClass = {

         return m;

     },

+    off: func {

+        me.del();

+        me.page.removeAllChildren();

+    },

+

     del : func (id = nil) {

         if (id != nil and typeof(id) == 'scalar') {

             delete(me.state, id);