let ti sensor tag try to reconnect

to close #196

hardware/sensorTag/79-sensorTag.html

@@ -51,12 +51,11 @@
    <p>Node to read from the Ti SensorTag</p>
    <p>The UUID field is the bluetooth mac address of the sensor tag, this is optional
       and can be used to bind to a specific SensorTag if you have more than one
-      active in range at the same time. <b>Note</b>:you can only have one SensorTag
-      per Node-RED instance at the moment.</p>
+      active in range at the same time.
    <p>The <i>topic</i> setting is a prefix that will be pre-pended to the name of the
       sensor that creates the reading. e.g. <i>sensorTag/temperature</i>. If
       blank it will be set to the UUID of the sensor tag.</p>
-    <p><strong>NOTE:</strong> Only 1 sensorTag can be read from at a time,
+    <p><strong>Note:</strong> Currently the node can only read from 1 sensorTag at a time,
       if you add more than one to the canvas then only the first to connect
       will work.</p>
     <p>Linux users should <a href="https://github.com/sandeepmistry/bleno#running-on-linux" target="_new">READ THIS</a>.</p>
@@ -67,7 +66,7 @@
         category:'advanced-function',
         color:"GoldenRod",
         defaults:{
-            name:{value:"sensorTag"},
+            name:{value:""},
             topic:{value:"sensorTag"},
             uuid:{value:undefined},
             temperature:{value:true},

hardware/sensorTag/79-sensorTag.js

@@ -33,10 +33,13 @@ module.exports = function(RED) {
         this.keys = n.keys;
         if (this.uuid === "") { this.uuid = undefined; }
         var node = this;
+        node.discovering = false;
 
         if (typeof node.stag === "undefined") {
+            node.loop = setInterval(function() {
+                if (!node.discovering) {
                     node.status({fill:"blue", shape:"dot", text:"discovering..."});
-
+                    node.discovering = true;
                     SensorTag.discover(function(sensorTag) {
                         node.status({fill:"blue", shape:"dot", text:"connecting"});
                         node.stag = sensorTag;
@@ -47,6 +50,7 @@ module.exports = function(RED) {
                             node.status({fill:"green", shape:"dot", text:"connected"});
 
                             sensorTag.on('disconnect', function() {
+                                node.discovering = false;
                                 node.status({fill:"red", shape:"ring", text:"disconnected"});
                                 node.log("disconnected ",node.uuid);
                             });
@@ -108,15 +112,16 @@ module.exports = function(RED) {
                             });
                         });
                     },node.uuid);
+                }
+            },15000);
         } else {
             console.log("reconfig",node.uuid);
             enable(node);
         }
 
         this.on("close", function() {
-            if (node.stag) {
-                node.stag.disconnect(function() {});
-            }
+            if (node.loop) { clearInterval(node.loop); }
+            if (node.stag) { node.stag.disconnect(function() {}); }
         });
     }
 

hardware/sensorTag/package.json

@@ -1,7 +1,7 @@
 {
     "name": "node-red-node-sensortag",
     "description": "A Node-RED node to read data from a TI SensorTag",
-    "version": "0.0.12",
+    "version": "0.0.13",
     "keywords": [
         "node-red",
         "sensortag",