Handle zigbee commands sequentially (and refactor it). #529

lib/zigbee.js

@@ -177,8 +177,8 @@ class Zigbee {
         return this.shepherd.list();
     }
 
-    getDevice(deviceID) {
-        return this.getDevices().find((d) => d.ieeeAddr === deviceID);
+    getDevice(ieeeAddr) {
+        return this.getDevices().find((d) => d.ieeeAddr === ieeeAddr);
     }
 
     getCoordinator() {