Tiny tidy up of RBE node

function/rbe/README.md

@@ -1,7 +1,8 @@
 node-red-node-rbe
 =================
 
-A <a href="http://nodered.org" target="_new">Node-RED</a> node that provides provides report-by-exception (RBE) and deadband capability.
+A <a href="http://nodered.org" target="_new">Node-RED</a> node that provides
+provides report-by-exception (RBE) and deadband capability.
 
 Install
 -------
@@ -14,15 +15,18 @@ Run the following command in the root directory of your Node-RED install
 Usage
 -----
 
-A simple node to provide report by exception (RBE) and deadband function - only passes on data if it has changed.
+A simple node to provide report by exception (RBE) and deadband function
+- only passes on data if it has changed.
 
 ###RBE mode
 
-Outputs the **msg**  if the **msg.payload** is different to the previous one. Works on numbers and strings. Useful for filtering out repeated messages of the same value. Saves bandwidth, etc...
+Outputs the **msg** if the **msg.payload** is different to the previous one.
+Works on numbers and strings. Useful for filtering out repeated messages of the
+same value. Saves bandwidth, etc...
 
 ###Deadband mode
 
 In deadband mode the incoming payload should contain a parseable *number* and is
-    output only if greater than + or - the *band gap* away from the previous output.
+output only if greater than + or - the *band gap* away from the previous output.
 
-Will accept numbers, or strings like  "18.4 C"  or "$500"
+Will accept numbers, or parseable strings like  "18.4 C"  or "$500"

function/rbe/package.json

@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-rbe",
-    "version"       : "0.0.1",
+    "version"       : "0.0.2",
     "description"   : "A Node-RED node that provides report-by-exception (RBE) and deadband capability.",
     "dependencies"  : {
     },

function/rbe/rbe.html

@@ -34,9 +34,9 @@
 
 <script type="text/x-red" data-help-name="rbe">
     <p>Report by Exception node - only passes on data if it has changed.</p>
-    <p>In RBE mode this node only outputs the msg if the <b>msg.payload</b> is
+    <p>In <b>RBE</b> mode this node only outputs the msg if the <b>msg.payload</b> is
     different to the previous one. Works on numbers and strings.</p>
-    <p>In deadband mode the incoming payload should contain a parseable <i>number</i> and is
+    <p>In <b>deadband</b> mode the incoming payload should contain a parseable <i>number</i> and is
     output only if greater than + or - the <i>band gap</i> away from the previous output.</p>
 </script>
 

function/rbe/rbe.js

@@ -33,8 +33,8 @@ module.exports = function(RED) {
             }
             else {
                 var n = parseFloat(msg.payload);
-                if (previous == null) { previous = n - node.gap; }
                 if (!isNaN(n)) {
+                    if (previous == null) { previous = n - node.gap; }
                     if (Math.abs(n - previous) >= node.gap) {
                         previous = n;
                         node.send(msg);