How to identify the unique identification number on a 4 Door Base Controller
This article shows you where to find the unique identification number on a 4 Door Base Controller (1104/921) for IPassan systems.
The unique identification number can be located on the box and on the controller itself.
See where this is located on the controller in the gif below:
Please note, it does not matter which unique identification number you use, even if you are using multiple controllers when setting up your IPassan system.