# MQTT

MQTT is a lightweight publish/subscribe messaging protocol designed for IoT applications. 

Qubitro supports both MQTT v3.1.1 and MQTT v5.0, enabling secure and efficient data transmission from devices.

### Specifications

| Parameter      | Description                        |
| -------------- | ---------------------------------- |
| Broker Address | broker.qubitro.com                 |
| Port (SSL/TLS) | 8883 (encrypted)                   |
| Port (TCP)     | 1883 (unencrypted)                 |
| Topic          | Device ID (provided by Qubitro)    |
| Client ID      | Device ID (provided by Qubitro)    |
| QoS            | Quality of Service Levels          |
| QoS Level 2    | Exactly once                       |
| QoS Level 1    | At least once                      |
| QoS Level 0    | At most once                       |
| Password       | Device Token (provided by Qubitro) |
| Username       | Device ID (provided by Qubitro)    |

{% hint style="danger" %}
Both the **Client ID** and the **Topic** must be set to the **Device ID**; otherwise, even if the connection and authentication succeed, Qubitro will not automatically store or display the published data.
{% endhint %}

### Create an MQTT Source

{% stepper %}
{% step %}
**Navigate to the Project Detail Page**

Go to the project where you want to create an MQTT source.
{% endstep %}

{% step %}
**Create a New Source**

Click **New Source**, then select **MQTT** from the available options.
{% endstep %}

{% step %}
**Fill Out the Required Information**

Enter details according to your configuration needs.
{% endstep %}

{% step %}
**Create & Verify**

Click **Create**. Qubitro automatically generates the **Device ID** and **Device Token**. You can find these credentials in the **Device Overview** or **Device Settings** under the **Unique IDs** card.
{% endstep %}
{% endstepper %}