diff --git a/README.md b/README.md
index 1311f9c..97032df 100755
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ## UniFi Controller API client class
 
-A PHP class which provides access to Ubiquiti's **UniFi Controller API**, versions 4.X.X and 5.X.X of the UniFi Controller software are supported (version 5.8.24 has been confirmed to work). It's a standalone version of the class which is used in our API browser tool which can be found [here](https://github.com/Art-of-WiFi/UniFi-API-browser).
+A PHP class which provides access to Ubiquiti's **UniFi Controller API**, versions 4.X.X and 5.X.X of the UniFi Controller software are supported (version 5.9.29 has been confirmed to work). It's a standalone version of the class which is used in our API browser tool which can be found [here](https://github.com/Art-of-WiFi/UniFi-API-browser).
 
 This class can be installed manually or using composer/[packagist](https://packagist.org/packages/art-of-wifi/unifi-api-client) for easy inclusion in your projects.
 
@@ -139,6 +139,7 @@ The class currently supports the following functions/methods to get/post/put/del
 - upgrade_device_external()
 - start_rolling_upgrade()
 - cancel_rolling_upgrade()
+- cmd_stat()
 
 Internal functions, getters/setters:
 
diff --git a/examples/README.md b/examples/README.md
index 53d0ea4..a79468b 100755
--- a/examples/README.md
+++ b/examples/README.md
@@ -9,6 +9,17 @@ Then update the contents of your new config.php with your controller details and
 
 Also make sure to update the path for the composer autoloader file (`vendor/autoload.php`) or the file containing the Class itself (`src/Client.php`) in your `require_once()` statement as required.
 
+#### Executing scripts from the CLI
+
+Most of the included example scripts can be run from the CLI or shell as follows after the necessary credentials and parameters have been added or updated:
+
+
+```sh
+$ php list_site_health.php
+```
+
+NOTE: this does require the `php-cli` module to be installed
+
 ### Contribute
 
 If you would like to share your own example file(s), please open an issue and include your code there or else create a pull request.
diff --git a/src/Client.php b/src/Client.php
index 1173b1f..9e7229d 100755
--- a/src/Client.php
+++ b/src/Client.php
@@ -1158,15 +1158,16 @@ class Client
     /**
      * List firewall groups (using REST)
      * ----------------------------------
-     * returns an array containing the current firewall groups on success
+     * returns an array containing the current firewall groups or the selected firewall group on success
+     * optional parameter <group_id> = id of the single firewall group to list
      */
-    public function list_firewallgroups()
+    public function list_firewallgroups($group_id = null)
     {
         if (!$this->is_loggedin) {
             return false;
         }
 
-        $response = $this->exec_curl('/api/s/' . $this->site . '/rest/firewallgroup');
+        $response = $this->exec_curl('/api/s/' . $this->site . '/rest/firewallgroup/' . trim($group_id));
 
         return $this->process_response($response);
     }
@@ -1257,6 +1258,22 @@ class Client
         return $this->process_response_boolean($response);
     }
 
+    /**
+     * List firewall rules (using REST)
+     * ----------------------------------
+     * returns an array containing the current firewall rules on success
+     */
+    public function list_firewallrules()
+    {
+        if (!$this->is_loggedin) {
+            return false;
+        }
+
+        $response = $this->exec_curl('/api/s/' . $this->site . '/rest/firewallrule');
+
+        return $this->process_response($response);
+    }
+
     /**
      * List health metrics
      * -------------------
@@ -2773,7 +2790,7 @@ class Client
             return false;
         }
 
-        $json     = [
+        $json = [
             '_sort'  => '-time',
             'within' => intval($historyhours),
             'type'   => null,
@@ -3165,6 +3182,28 @@ class Client
         return $this->process_response_boolean($response);
     }
 
+    /**
+     * Execute specific command
+     * ------------------------
+     * return true on success
+     * required parameter <command>  = string; command to execute, known valid values
+     *                                 'reset-dpi': reset all DPI counters for the current site
+     *
+     * NOTE:
+     * the provided <command> parameter isn't validated so make sure you're using a correct value
+     */
+    public function cmd_stat($command)
+    {
+        if (!$this->is_loggedin) {
+            return false;
+        }
+
+        $json     = json_encode(['cmd' => trim($command)]);
+        $response = $this->exec_curl('/api/s/' . $this->site . '/cmd/stat', 'json=' . $json);
+
+        return $this->process_response_boolean($response);
+    }
+
     /****************************************************************
      * "Aliases" for deprecated functions from here, to support
      * backward compatibility: