Merge pull request #315 from NotoriousBIT/v4.0-dev

Check if socket is already connected

Author: stefanpoeter

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jsmodbus",
-  "version": "4.0.7",
+  "version": "4.0.8",
   "description": "Implementation for the Serial/TCP Modbus protocol.",
   "author": "Stefan Poeter <stefan.poeter@cloud-automation.de>",
   "main": "./dist/modbus.js",

src/tcp-client-request-handler.ts

@@ -39,6 +39,11 @@ export default class ModbusTCPClientRequestHandler extends MBClientRequestHandle
 
     this._socket.on('connect', this._onConnect.bind(this))
     this._socket.on('close', this._onClose.bind(this))
+    
+    // Check if the passed in socket connection is already connected
+    if(this._socket.readyState === 'open'){
+      this._onConnect()
+    }
   }
 
   // TODO: Find a better way then putting in the any overide