Fixed error handling when serialport cannot make a connection

config.schema.json

@@ -27,6 +27,12 @@
           "type": "integer",
           "default": -79,
           "required": true
+      },
+      "timeout": {
+          "title": "Timeout Between commands",
+          "type": "integer",
+          "default": 500,
+          "required": false
       }
     }
   }

index.js

@@ -158,8 +158,10 @@ module.exports = function(homebridge) {
         this.log("sendCommand: " + command);
 
         if(!this.serialPort.isOpen){
-            this.log.warn("serialPort is not open... open it");
-            this.open();
+            this.log.warn("serialPort is not open... trying to open it");
+            this.open(function(result, error) {
+                if(error && callback) callback(result,error);
+            });
         }
 
         this.serialPort.write(command);
@@ -212,12 +214,12 @@ module.exports = function(homebridge) {
         this.serialPort.open(function (error) {
             if(error) {
                 this.log.error("Error when opening serialport: " + error);
-                if(callback) callback(0,error);
+                if(callback) callback(0, error);
             }
             else {
                 this.log("Set auto status feedback to full");
                 setTimeout(function() {this.sendCommand("@AST:F\r");}.bind(this), 5000);
-                if(callback) callback();
+                if(callback) callback(1);
             }
         }.bind(this));
     },

package.json

@@ -1,6 +1,6 @@
 {
   "name": "homebridge-marantz-rs232",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "Marantz rs232 receiver plugin for homebridge: https://github.com/nfarina/homebridge",
   "license": "ISC",
   "keywords": [