---
title: Azure IoT Hub
slug: litmusedge/product-features/integration/integration-connectors/azure/azure-iot-hub
docTags: 
createdAt: 2026-09-08T21:58:00.834Z
---

The Azure IoT Hub integration enables Litmus Edge (LE) to connect to Azure IoT Hub services via SAS Key or Device Certificate over the MQTT protocol.

## Supported communication

- Outbound (Publish data from Edge to Azure IoT Hub) - Yes
- Inbound (Subscribe data from Azure IoT Hub to Edge) - Yes

## Configurations

| **Field**         | **Details**                                                                                                                                                                            | **Required** |
| ----------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Name              | Connector name.                                                                                                                                                                        | Yes          |
| Connection Type   | Authentication method: SAS Key or Device Certificate.                                                                                                                                  | Yes          |
| Hostname          | DNS name of MQTT host. It can be found in the **Overview** tab of your Azure IoT Hub.                                                                                                  | Yes          |
| Port              | Port of MQTT host.                                                                                                                                                                     | Yes          |
| Device ID         | ID of the device as shown in your Azure IoT account.                                                                                                                                   | Yes          |
| Certificate       | PEM certificate used to authenticate the device when Connection Type is set to certificate.                                                                                            | No           |
| Private key       | Private key for the device certificate, in PEM format. Must match the **Certificate** field above.                                                                                     | No           |
| SAS Key           | Primary or secondary shared access key.                                                                                                                                                | Yes          |
| Integration Topic | Azure IoT Hub MQTT topic for device-to-cloud messages.                                                                                                                                 | Yes          |
| Throttling limit  | Set a limit on the number of outbound messages per second. If sending data to a server that has restrictions on the rate of incoming messages, this ensures that no messages are lost. | No           |

## Advanced configurations

| **Field**              | **Details**                                                                                                             | **Required** |
| ---------------------- | ----------------------------------------------------------------------------------------------------------------------- | ------------ |
| Parallel Publish Count | Number of messages published in parallel. Higher values increase throughput and resource usage.                         | No           |
| Token TTL (minutes)    | The token expiry time in minutes.                                                                                       | No           |
| LWT topic              | MQTT topic the broker publishes the Last Will message to if this client disconnects unexpectedly.                       | No           |
| LWT payload            | Message content published to the LWT topic on unexpected disconnection. Typically a status or alert string.             | No           |
| LWT payload type       | Encoding of the LWT payload: `string` for plain text, `base64` for binary data.                                         | No           |
| LWT QoS                | QoS level for the Last Will message: `0` = at most once, `1` = at least once, `2` = exactly once.                       | No           |
| LWT retained           | When enabled, the broker retains the Last Will message and immediately delivers it to any new subscriber on that topic. | No           |

## Persistent storage configurations

| **Field**                     | **Details**                                                                                                                                                                                          | **Required** |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Persistent storage            | If enabled, messages in the outbound queue are stored on disk. If there are interruptions in connection or power loss, messages are retained and eventually sent when the connection is restored.    | No           |
| Persistent storage size limit | Set the size limit for storing persisted data in GB.                                                                                                                                                 | No           |
| Queue mode                    | Select the sequence of data transfer: `FIFO` or `LIFO`. Selecting `FIFO` (First In First Out) sends the earliest message first. Selecting `LIFO` (Last In First Out) sends the latest message first. | No           |

## Related topics

- [Azure IoT Hub Gen 2 Integration Guide](docId\:REPLACE_ME)
- [Set up an Azure IoT Hub](docId\:SpFPgYS_4Fo-1mM21APmR)
- [Add a Connector](docId:4YVfCEP7GYScJHMKYFCuM)
- [Manage Connectors](docId\:tQoP7QtquSQqDq9yhbJ34)