Keywords, extra checks

- Added keywords
- Added checks for connections in start() and stop()

lib/Shuttle.js

@@ -20,22 +20,27 @@ class Shuttle extends EventEmitter {
   }
 
   start () {
-    usbDetect.startMonitoring()
-    usbDetect.on('add', (d) => {
-      // Delay connection by 1 second because
-      // it takes a second to load on macOS
-      setTimeout(() => {
-        this._connect()
-      }, process.platform === 'darwin' ? 1000 : 0)
-    })
-    // Find already
-    this._connect()
+    if (!this._connected) {
+      usbDetect.startMonitoring()
+      usbDetect.on('add', (d) => {
+        // Delay connection by 1 second because
+        // it takes a second to load on macOS
+        setTimeout(() => {
+          this._connect()
+        }, process.platform === 'darwin' ? 1000 : 0)
+      })
+      // Find already
+      this._connect()
+    }
   }
 
   stop () {
-    usbDetect.stopMonitoring()
-    this._hid.close()
-    this._hid = null
+    if (this._connected) {
+      usbDetect.stopMonitoring()
+      this._hid.close()
+      this._hid = null
+      this._connected = false
+    }
   }
 
   _connect () {

package.json

@@ -16,6 +16,13 @@
     "url": "https://github.com/hopejr/ShuttleControlUSB/issues"
   },
   "homepage": "https://github.com/hopejr/ShuttleControlUSB",
+  "keywords": [
+    "shuttlexpress",
+    "shuttlepro",
+    "usb",
+    "shuttle",
+    "jog"
+  ],
   "dependencies": {
     "node-hid": "^1.3.0",
     "usb-detection": "^4.10.0"