> For the complete documentation index, see [llms.txt](https://docs.buildings.ability.abb/collection/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.buildings.ability.abb/collection/mandatory-base/platform-core/connect-hub/connectivity-as-a-service/connect-devices-via-mqtt/create-a-new-client.md).

# Create a New Client

Proceed as follows to establish a new connection to a broker or to edit an existing connection.

<figure><img src="https://2013058394-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOqGnkz52o2zVUsEGEZGk%2Fuploads%2FGGC5z4PFLXcEwgWKIwpC%2FGroup%2012.png?alt=media&amp;token=6beabcfc-1e37-452e-9d73-3c68f1988a16" alt=""><figcaption><p>Fig. 1 – Connections -> MQTT</p></figcaption></figure>

## Connect with a New Client

1. In the sidebar, click on **Connection \[A]**\
   ▷ The "Connections" window opens
2. Select the **MQTT \[B]** tab
3. In the workspace, a list of all already connected brokers is displayed **\[C]**\
   ◈ If you do not see any entries, no brokers have been connected yet\
   ◈ Brokers that have been configured in other tenants are also displayed
4. Click on **\[D]** to connect to a new broker\
   ▷ The [↗ "Client Details"](/collection/mandatory-base/platform-core/connect-hub/connectivity-as-a-service/connect-devices-via-mqtt/configure-client.md) open
5. Configure the broker as described in the chapter [↗ "Configure client"](/collection/mandatory-base/platform-core/connect-hub/connectivity-as-a-service/connect-devices-via-mqtt/configure-client.md)

## Edit Client

1. In the sidebar, click on **Connection \[A]**\
   ▷ The "Connections" window opens
2. Select the **MQTT \[B]** tab
3. In the workspace, a list of all already connected brokers is displayed **\[C]**\
   ◈ Brokers that have been configured in other tenants are also displayed
4. Click on **\[F]** to open a connected broker\
   ▷ The [↗ "Client Details" ](/collection/mandatory-base/platform-core/connect-hub/connectivity-as-a-service/connect-devices-via-mqtt/configure-client.md)open
5. Configure the broker as described in the chapter [↗ "Configure client"](/collection/mandatory-base/platform-core/connect-hub/connectivity-as-a-service/connect-devices-via-mqtt/configure-client.md).


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