diff --git a/hardware/sensorTag/79-sensorTag.html b/hardware/sensorTag/79-sensorTag.html
index 19d21eb8..6b9bd14a 100644
--- a/hardware/sensorTag/79-sensorTag.html
+++ b/hardware/sensorTag/79-sensorTag.html
@@ -78,6 +78,10 @@
    <!-- The first <p> is used as the pop-up tool tip when hovering over a    -->
    <!-- node in the palette.                                                 -->
    <p>Input node for the Ti SensorTag</p>
+   <p>The UUID field is the mac address of the sensor tag, this is optional
+      can be used to bind to a specific SensorTag if you have more than one
+      active in range at the same time. (note you can only have one SensorTag per 
+      node-red instance at the moment)</p>
 </script>
 
 <!-- Finally, the node type is registered along with all of its properties   -->
@@ -109,6 +113,7 @@
         },
         oneditsave: function() {
            var mac = $("#node-input-uuid").val();
+           mac = mac.toLowerCase();
            //nasty hack as I can't get global replace to work
            mac = mac.replace(/:/gi,'');
            mac = mac.replace(/:/gi,'');
diff --git a/hardware/sensorTag/79-sensorTag.js b/hardware/sensorTag/79-sensorTag.js
index 91d40b07..b63a6eba 100644
--- a/hardware/sensorTag/79-sensorTag.js
+++ b/hardware/sensorTag/79-sensorTag.js
@@ -17,8 +17,6 @@
 // Require main module
 var RED = require(process.env.NODE_RED_HOME+"/red/red");
 var SensorTag = require('sensortag');
-var stag;
-var node;
 
 // The main node definition - most things happen in here
 function sensorTagNode(n) {
@@ -37,14 +35,14 @@ function sensorTagNode(n) {
     if (this.uuid === "") {
         this.uuid = undefined;
     }
-    console.log(this.uuid);
+    //console.log(this.uuid);
 
-    node=this;
+    var node=this;
 
-    if ( typeof stag == "undefined") {
+    if ( typeof node.stag == "undefined") {
     //console.log("starting");
     SensorTag.discover(function(sensorTag){
-        stag = sensorTag;
+        node.stag = sensorTag;
         sensorTag.connect(function(){
             //console.log("connected");
             sensorTag.discoverServicesAndCharacteristics(function(){
@@ -94,51 +92,51 @@ function sensorTagNode(n) {
                    msg.payload = {'left': left, 'right': right};
                    node.send(msg);
                 });
-                enable();
+                enable(node);
             });
         });
     },node.uuid);
     } else {
       //console.log("reconfig");
-      enable();
+      enable(node);
     }
 }
 
-function enable() {
-                if (node.temperature) {
-                  stag.notifyIrTemperature(function(){});
-                } else {
-                  stag.unnotifyIrTemperature(function(){});
-                }
-                if (node.pressure) {
-                  stag.notifyBarometricPressure(function(){});
-                } else {
-                  stag.unnotifyBarometricPressure(function(){});
-                }
-                if (node.humidity) {
-                  stag.notifyHumidity(function() {});
-                } else {
-                  stag.unnotifyHumidity(function() {});
-                }
-                if (node.accelometer){
-                  stag.notifyAccelerometer(function() {});
-                } else {
-                  stag.unnotifyAccelerometer(function() {});
-                }
-                if (node.magnetometer) {
-                  stag.notifyMagnetometer(function() {});
-                } else {
-                  stag.unnotifyMagnetometer(function() {});
-                }
-                if (node.gyroscope) {
-                  stag.notifyGyroscope(function() {});
-                } else {
-                  stag.unnotifyGyroscope(function() {});
-                }
-                if (node.keys) {
-                  stag.notifySimpleKey(function() {});
-                } else {
-                  stag.unnotifySimpleKey(function() {});
-                }
+function enable(node) {
+    if (node.temperature) {
+        node.stag.notifyIrTemperature(function(){});
+    } else {
+       node.stag.unnotifyIrTemperature(function(){});
+    }
+    if (node.pressure) {
+       node.stag.notifyBarometricPressure(function(){});
+    } else {
+       node.stag.unnotifyBarometricPressure(function(){});
+    }
+    if (node.humidity) {
+       node.stag.notifyHumidity(function() {});
+    } else {
+       node.stag.unnotifyHumidity(function() {});
+    }
+    if (node.accelometer){
+       node.stag.notifyAccelerometer(function() {});
+    } else {
+       node.stag.unnotifyAccelerometer(function() {});
+    }
+    if (node.magnetometer) {
+       node.stag.notifyMagnetometer(function() {});
+    } else {
+       node.stag.unnotifyMagnetometer(function() {});
+    }
+    if (node.gyroscope) {
+       node.stag.notifyGyroscope(function() {});
+    } else {
+       node.stag.unnotifyGyroscope(function() {});
+    }
+    if (node.keys) {
+       node.stag.notifySimpleKey(function() {});
+    } else {
+       node.stag.unnotifySimpleKey(function() {});
+    }
 }
 RED.nodes.registerType("sensorTag",sensorTagNode);