In MikroTik RouterOS, it is possible to configure the hotspot login window to show relevant information to the user, including data consumption.

However, directly displaying data consumption in the hotspot login window is not a direct or default functionality and may require some customization and use of scripts or integration with external systems.

Here's how this could be achieved:

1. Using User Profiles and User Manager:

• User Profiles: You can define user profiles within the hotspot settings in MikroTik, which may include data limits. These profiles control access and can limit the amount of data a user can consume.
• User Manager: It is a more advanced user management system that can be integrated with MikroTik hotspot. It allows more detailed management and can store user data consumption statistics.

2. Customization of the login page:

• To display data consumption on the login page, you would need to customize the page's HTML and scripts. This could involve:
  • HTML/CSS: Modify the page design to include space where consumption data will be displayed.
  • JavaScript and AJAX: To make dynamic requests that retrieve the user's data consumption from the MikroTik backend.
  • MikroTik API: Use the API to retrieve consumption data for each user in real time.

3. Implementation of an external system:

• You can implement or integrate an external system that manages user sessions and records data consumption. This system can interact with the MikroTik API to obtain the necessary data and then pass it to the hotspot login page.
• External database: Such a system might require a database that keeps records of each user's data consumption.

4. Scripting in MikroTik:

• MikroTik RouterOS allows the execution of scripts that could calculate and record users' data consumption. A script could be run periodically to update this information and make it accessible through the login page.

Considerations:

• Safety: When implementing the display of sensitive data such as data consumption on a public page, be sure to properly handle authentication and authorization to protect user privacy.
• Performance: Implementing additional features on the login page, especially those that require real-time interactions with the database or API, could impact performance. It is important to ensure that the system is optimized and can handle the expected workloads.

In summary, although it is not a functionality directly supported by default in MikroTik, with proper customization and possibly the help of additional tools, you can configure the login window to display information about data consumption.