---
title: Add a Node
slug: litmusedge/product-features/opc-ua-server/hierarchy/add-a-node
description: You can manually add nodes to the OPC UA hierarchy. 
docTags: 
createdAt: 2022-09-26T14:14:20.000Z
---

You can manually add nodes to the OPC UA hierarchy by navigating to **OPC **>** Hierarchy**.  

# Add a Node

**To add a node:**

1. Navigate to **OPC **> **Hierarchy**. 
2. From *Hierarchy* pane, click the **Add **icon. If a parent node already exists, you can select it prior to clicking the *Add *icon. 
   ![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/NoFMmXYDAOGQuiQRZCqdt_addnodeicon.png "The Add node icon")
3. From the Add node dialog box, select one of the following options:
   - Folder
   - Device
   - Tag
4. Refer to the respective type depending on your selection and enter the details for the node. 

## Folder

Enter a descriptive name and click **Add**. 

## Device

Enter a descriptive name and click **Add**. 

## Tag

:::hint{type="info"}
**Notes**: 

- Topics you enter can come from sources other than DeviceHub devices. 
- The payload structure for tags must include at least the `value` and `success` strings of JSON objects. For example:
  - `{`
    `"value": 11.11,`
    `"success": true`
    `}`
:::

- **Node name**: Enter a descriptive name. 
- **Topic**: Enter a topic name. 
- **Data Type**: Select a data type. Refer to [Data Type Mapping](docId\:LMrHRq-s5GGOb75p2Bzyr) to learn more. 

When done configuring the node, click **Add**. 

After clicking *Add*, click the **Save **icon. 

![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/TrvN5hVsKrOfhBB48SvGo_image.png "Save icon for nodes")

# Restart OPC UA server

After saving the new node, you must restart the OPC UA server. See [Manage the OPC UA Server](docId:7VkiL1p6HpevwgMVJ98dx) to learn more.