Niko Access Control - Digital - How do I connect a 2nd external unit to my 2-wire access control?
You can add an external unit through “Settings’ on the internal unit. The menu will guide you through assigning a door lock and selecting a ringtone for that external unit.
You can connect an extra external unit to the app by scanning its QR code.
If the external unit does not show up in the menu, you need to reset the installation through Settings => System settings => Reset => Reconfigure settings.