# License manager

To use sensors in Efento Cloud, each device must have an active license. Licenses are activated within the Efento Cloud platform using an **Activation Code** provided by Efento. When placing an order, customers specify the number of sensors and the desired license duration. A single Activation Code can generate multiple licenses. For example, ordering five sensors may result in one Activation Code, which, when entered into Efento Cloud, will enable the addition and usage of all five sensors for the specified license period (e.g., two years).

Using the License Manager, users with **Manager** or **Administrator** permissions can easily monitor license status, expiration dates, and manage license assignments across all sensors in their organization, ensuring seamless operation of the Efento Cloud platform.

## Adding Licenses

Efento Cloud prompts you to enter an Activation Code that provides licenses during the onboarding process. Additional Activation Codes can be added at any time through the **Organization Settings**. To add a license:

1. In the Organisation settings click the **Open** button next to **License Manager**.
2. Press the **Add** button and enter the Activation Code provided by Efento.

Once the code is successfully added, the **Licenses left** value will increase, allowing you to assign sensors to Efento Cloud.

## License Lifetime

Each license has a predefined lifetime, which determines the period during which the assigned sensor can send data to Efento Cloud. When the license expires:

* New measurements from the sensor will no longer be saved or processed.
* Historical measurements and previously triggered alerts remain accessible.

Efento Cloud sends notifications about expiring licenses [to the selected users via email](/efento-cloud/advanced/organization-settings/notification-manager.md):

* 1 month before the expiration date
* On the expiration day

To continue using a sensor with an expiring license, you must provide a new Activation Code. If there are unassigned licenses available, Efento Cloud will automatically renew the license for the sensor.

## Managing Licenses

The **License Manager** provides a complete overview of all sensors and their assigned licenses.

![](/files/7b6618fb8e4680a5fe3e815b6b257d4c15e3281b)

The list contains the following information:

* **Sensor serial number / name**
* **Activation date** – the date the sensor was assigned to a license; license lifetime starts from this date
* **Expires at** – license expiration date and the number of days remaining
* **Key** – license key assigned to the sensor; if a single license key covers multiple licenses, the number of licenses assigned is shown in brackets

On top of that, there are two additional columns in the licences table:

* **Add License (“+” button next to each sensor)** – Manually assign a license key to a specific sensor. A sensor can have multiple licenses queued, and once the current license expires, the next one will be applied automatically.
* **Auto Renewal** – When enabled, Efento Cloud automatically assigns a new license from the available licences pool to a sensor when its current license expires. This feature is enabled by default, ensuring uninterrupted operation. To maintain continuous service, users only need to enter new Activation Codes before the existing ones expire.


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