From 90b53843602b93f5b8fd6ad368fab6a53da000b0 Mon Sep 17 00:00:00 2001
From: Daniel Lando <daniel.sorridi@gmail.com>
Date: Fri, 9 Feb 2018 15:09:37 +0100
Subject: [PATCH] Fixed TypeError when calling .open the second time

Moved the isOpen defineProperty outside the .open method.
---
 index.js | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/index.js b/index.js
index 86c8c5b..129fe8f 100644
--- a/index.js
+++ b/index.js
@@ -342,21 +342,23 @@ ModbusRTU.prototype.open = function(callback) {
                 callback(error);
         }
     });
+};
+
 
-    /**
-     * Check if port is open
-     */
-    Object.defineProperty(this, "isOpen", {
-        enumerable: true,
-        get: function() {
-            if (this._port) {
-                return this._port.isOpen;
-            }
-
-            return false;
+/**
+ * Check if port is open
+ */
+Object.defineProperty(ModbusRTU.prototype, "isOpen", {
+    enumerable: true,
+    get: function() {
+        if (this._port) {
+            return this._port.isOpen;
         }
-    });
-};
+
+        return false;
+    }
+});
+
 
 /**
  * Close the serial port