+const QUERY_ACTIVITY_CONFIG = {
+  delay: 1000,
+  options: {
+    leading: false,
+    trailing: true
+  }
+};
+
 const queryActivity = _.throttle(() => {
   if (this.isOpen()) {
     this.connection.write('?');
   }
-}, 1000, {
-  // For grbl-Mega, it is essential to allow a specific delay before querying the status report to avoid blocking the connection.
-  // Therefore, the `leading` option must be set to false.
-  // @see https://github.com/cncjs/cncjs/issues/889
-  leading: false,
-  trailing: true,
-});
+}, QUERY_ACTIVITY_CONFIG.delay, QUERY_ACTIVITY_CONFIG.options);

-const defaultState = { // default state
+const defaultConfig = {
   allowAnonymousUsageDataCollection: false,
   checkForUpdates: true,
   controller: {
     exception: {
       ignoreErrors: false