UC EI is a minimal interface for controlling the Universal Controller subsystem. The interface is not intended for daily use. It is designed solely for configuration, debugging and use in case of emergency, e. g. when the primary system interface is unavailable.

Logging in

To log into the interface, open http://IP_address_UC:port/ url (the default port is 8812), enter API key and press Enter to log in or Remember API key to log in and make your browser remember the key.

Login page

System information

Controller info

System information is at the bottom of the interface. Clicking on the Debug mode enables or disables the controller debugging mode.


The units page opens after you’ve logged in. On the top you see the controller name, key type (masterkey or the regular one) and data synchronization method (instant - via WebSocket, numeric value - via AJAX every X seconds).

Important: when you create/delete units, the interface does not automatically display the changes made. Use reload button or refresh the page in browser.

Units page

On the page, you can:

  • execute actions commands to the units (buttons change unit status, you cannot set the action value from the interface)

  • enable or disable the unit actions

  • set status and value of the unit manually (SET)

  • clean up the action queue and terminate the current action (KILL)


On the sensors page you can review the current value of each sensor, make it enabled or disabled.

Sensors page

Log viewer

The log page allows you to review the system log since the controller launch. If you set the report level to DEBUG, interface automatically prompts you to switch the controller to debugging mode.

Log viewer

Disabling the interface

For security reasons, it may be a good idea to disable the interface after the initial configuration and system debug. To do this, set webapi/ei-enabled:false in config/uc/main registry key and restart the controller.