added serial plugin details

docs/software/settings/serial-plugin.md

@@ -22,9 +22,9 @@ Once plugin settings are changed, a **reset** is required for them to take effec
 | serialplugin_enabled | `true`, `false` | `false` |
 | serialplugin_echo | `true`, `false` | `false` |
 | serialplugin_mode | `integer` | `0` |
-| serialplugin_rxd | `integer` | `0` |
+| serialplugin_rxd | `integer` (GPIO) | `0` |
 | serialplugin_timeout | `integer` (seconds) | `0` |
-| serialplugin_txd | `integer` | `0` |
+| serialplugin_txd | `integer` (GPIO) | `0` |
 
 ### serialplugin_enabled
 
@@ -41,9 +41,12 @@ Enables the plugin.
   ]}>
   <TabItem value="cli">
 
-:::info
+  ```bash title="Enable plugin"
-Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
+  meshtastic --set serialplugin_enabled true
-:::
+  ```
+  ```bash title="Disable plugin"
+  meshtastic --set serialplugin_enabled false
+  ```
 
   </TabItem>
   <TabItem value="android">
@@ -71,7 +74,7 @@ Configuring this setting is not yet available for the selected platform. If this
 
 ### serialplugin_echo
 
-<!--- TODO --->
+If set, any packets you send will be echoed back to your device.
 
 <Tabs
   groupId="settings"
@@ -84,9 +87,12 @@ Configuring this setting is not yet available for the selected platform. If this
   ]}>
   <TabItem value="cli">
 
-:::info
+  ```bash title="Enable serialplugin_echo"
-Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
+  meshtastic --set serialplugin_echo true
-:::
+  ```
+  ```bash title="Disable serialplugin_echo"
+  meshtastic --set serialplugin_echo false
+  ```
 
   </TabItem>
   <TabItem value="android">
@@ -157,7 +163,7 @@ Configuring this setting is not yet available for the selected platform. If this
 
 ### serialplugin_rxd
 
-<!--- TODO --->
+Set the GPIO pin to the RXD pin you have set up.
 
 <Tabs
   groupId="settings"
@@ -170,10 +176,14 @@ Configuring this setting is not yet available for the selected platform. If this
   ]}>
   <TabItem value="cli">
 
-:::info
+:::note
-Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
+Replace `GPIO` in the below command with the GPIO number your circuit is attached to.
 :::
 
+  ```bash title="Set RXD to GPIO pin number"
+  meshtastic --set serialplugin_rxd GPIO
+  ```
+
   </TabItem>
   <TabItem value="android">
 
@@ -200,7 +210,7 @@ Configuring this setting is not yet available for the selected platform. If this
 
 ### serialplugin_timeout
 
-<!--- TODO --->
+The amount of time to wait before we consider your packet as "done".
 
 <Tabs
   groupId="settings"
@@ -213,9 +223,9 @@ Configuring this setting is not yet available for the selected platform. If this
   ]}>
   <TabItem value="cli">
 
-:::info
+  ```bash title="Set serialplugin_timeout to 15 seconds"
-Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
+  meshtastic --set serialplugin_timeout 15
-:::
+  ```
 
   </TabItem>
   <TabItem value="android">
@@ -243,7 +253,7 @@ Configuring this setting is not yet available for the selected platform. If this
 
 ### serialplugin_txd
 
-<!--- TODO --->
+Set the GPIO pin to the TXD pin you have set up.
 
 <Tabs
   groupId="settings"
@@ -256,10 +266,14 @@ Configuring this setting is not yet available for the selected platform. If this
   ]}>
   <TabItem value="cli">
 
-:::info
+:::note
-Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
+Replace `GPIO` in the below command with the GPIO number your circuit is attached to.
 :::
 
+  ```bash title="Set TXD to GPIO pin number"
+  meshtastic --set serialplugin_txd GPIO
+  ```
+
   </TabItem>
   <TabItem value="android">