Add configuration of serial protocol settings

- Add support for configuration of protocol parameters (data bits,
party, stop bits)
- Set serial device/port using select list (discovered ports)
- Provide default settings for existing flows that do not yet have
serial protocol settings

nodes/core/io/25-serial.html

@@ -95,7 +95,8 @@
 <script type="text/x-red" data-template-name="serial-port">
     <div class="form-row">
         <label for="node-config-input-serialport"><i class="icon-bullhorn"></i> Serial Port</label>
-        <input type="text" id="node-config-input-serialport" placeholder="/dev/ttyUSB0" style="width:50%;">
+        <select type="text" id="node-config-input-serialport" style="width:75%;">
+        </select>
     </div>
     <div class="form-row">
         <label for="node-config-input-serialbaud"><i class="icon-wrench"></i> Baud Rate</label>
@@ -119,6 +120,32 @@
             <option value="50">50</option>
         </select>
     </div>
+    <div class="form-row">
+        <label for="node-config-input-databits"><i class="icon-wrench"></i> Data Bits</label>
+        <select type="text" id="node-config-input-databits" style="width: 100px;">
+            <option value="8">8</option>
+            <option value="7">7</option>
+            <option value="6">6</option>
+            <option value="5">5</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-config-input-parity"><i class="icon-wrench"></i> Parity</label>
+        <select type="text" id="node-config-input-parity" style="width: 100px;">
+            <option value="none">None</option>
+            <option value="even">Even</option>
+            <option value="mark">Mark</option>
+            <option value="odd">Odd</option>
+            <option value="space">Space</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-config-input-stopbits"><i class="icon-wrench"></i> Stop Bits</label>
+        <select type="text" id="node-config-input-stopbits" style="width: 100px;">
+            <option value="2">2</option>
+            <option value="1">1</option>
+        </select>
+    </div>
     <div class="form-row">
         <label for="node-config-input-newline"><i class="icon-text-width"></i> New line</label>
         <input type="text" id="node-config-input-newline"  style="width: 50px;">
@@ -126,7 +153,7 @@
     <div class="form-row">
         <label for="node-config-input-addchar">&nbsp;</label>
         <select type="text" id="node-config-input-addchar" style="width: 70%;">
-            <option value="false">Don't add 'New Line' to serial output</option>
+            <option value="false">Dont add 'New Line' to serial output</option>
             <option value="true">Add 'New line' to serial output message</option>
         </select>
     </div>
@@ -140,12 +167,36 @@
             //name: {value:""},
             serialport: {value:"",required:true},
             serialbaud: {value:57600,required:true},
+            databits: {value:8,required:true},
+            parity: {value:"none",required:true},
+            stopbits: {value:1,required:true},
             newline: {value:"\\n"},
             addchar: {value:false}
         },
         label: function() {            
-            //return this.name||this.serialport;
+            if (typeof this.serialbaud === 'undefined') {
-            return this.serialport+":"+this.serialbaud;
+                this.serialbaud = 57600;
+            }
+            if (typeof this.databits === 'undefined') {
+                this.databits = 8;
+            }
+            if (typeof this.parity === 'undefined') {
+                this.parity = 'none';
+            }
+            if (typeof this.stopbits == 'undefined') {
+                this.stopbits = 1;
+            }
+            return this.serialport+":"+this.serialbaud+"-"+this.databits+this.parity.charAt(0).toUpperCase()+this.stopbits;
+        },
+        oneditprepare: function() {            
+            var p = this.serialport;
+            var s = $("#node-config-input-serialport");
+            $.getJSON('serialports',function(data) {
+                $.each(data, function(i, port){
+                    s.append($('<option>').text(port.comName).attr('value', port.comName));
+                });
+                s.val(p);
+            });
         }
     });
 </script>

nodes/core/io/25-serial.js

@@ -25,9 +25,29 @@ var serialp = require("serialport");
 function SerialPortNode(n) {
     RED.nodes.createNode(this,n);
     this.serialport = n.serialport;
-    this.serialbaud = n.serialbaud * 1;
     this.newline = n.newline;
     this.addchar = n.addchar || "false";
+
+    if (typeof n.serialbaud === 'undefined') {
+        this.serialbaud = 57600;
+    } else {
+        this.serialbaud = parseInt(n.serialbaud);
+    }
+    if (typeof n.databits === 'undefined') {
+        this.databits = 8;
+    } else {
+        this.databits = parseInt(n.databits);
+    }
+    if (typeof n.parity === 'undefined') {
+        this.parity = 'none';
+    } else {
+        this.parity = n.parity;
+    }
+    if (typeof n.stopbits == 'undefined') {
+        this.stopbits = 1;
+    } else {
+        this.stopbits = parseInt(n.stopbits);
+    }
 }
 RED.nodes.registerType("serial-port",SerialPortNode);
 
@@ -39,7 +59,12 @@ function SerialOutNode(n) {
 
     if (this.serialConfig) {
         var node = this;
-        node.port = serialPool.get(this.serialConfig.serialport,this.serialConfig.serialbaud,this.serialConfig.newline);
+        node.port = serialPool.get(this.serialConfig.serialport,
+            this.serialConfig.serialbaud,
+            this.serialConfig.databits,
+            this.serialConfig.parity,
+            this.serialConfig.stopbits,
+            this.serialConfig.newline);
         node.addCh = "";
         if (node.serialConfig.addchar == "true") {
             node.addCh = this.serialConfig.newline.replace("\\n","\n").replace("\\r","\r");
@@ -82,7 +107,12 @@ function SerialInNode(n) {
 
     if (this.serialConfig) {
         var node = this;
-        this.port = serialPool.get(this.serialConfig.serialport,this.serialConfig.serialbaud,this.serialConfig.newline);
+        node.port = serialPool.get(this.serialConfig.serialport,
+            this.serialConfig.serialbaud,
+            this.serialConfig.databits,
+            this.serialConfig.parity,
+            this.serialConfig.stopbits,
+            this.serialConfig.newline);
         this.port.on('data', function(msg) {
             node.send({ "payload": msg });
         });
@@ -105,7 +135,7 @@ RED.nodes.registerType("serial in",SerialInNode);
 var serialPool = function() {
     var connections = {};
     return {
-        get:function(port,baud,newline,callback) {
+        get:function(port,baud,databits,parity,stopbits,newline,callback) {
             var id = port;
             if (!connections[id]) {
                 connections[id] = function() {
@@ -123,12 +153,18 @@ var serialPool = function() {
                         if (newline == "") {
                             obj.serial = new serialp.SerialPort(port,{
                                 baudrate: baud,
+                                databits: databits,
+                                parity: parity,
+                                stopbits: stopbits,
                                 parser: serialp.parsers.raw
                             },true, function(err, results) { if (err) obj.serial.emit('error',err); });
                         }
                         else {
                             obj.serial = new serialp.SerialPort(port,{
                                 baudrate: baud,
+                                databits: databits,
+                                parity: parity,
+                                stopbits: stopbits,
                                 parser: serialp.parsers.readline(newline)
                             },true, function(err, results) { if (err) obj.serial.emit('error',err); });
                         }
@@ -147,7 +183,7 @@ var serialPool = function() {
                             }
                         });
                         obj.serial.on('open',function() {
-                            util.log("[serial] serial port "+port+" opened at "+baud+" baud");
+                            util.log("[serial] serial port "+port+" opened at "+baud+" baud "+databits+""+parity.charAt(0).toUpperCase()+stopbits);
                             if (obj.tout) { clearTimeout(obj.tout); }
                             //obj.serial.flush();
                             obj._emitter.emit('ready');