What is device ID value used in the write asset property file in tutorial-rest repo of tandem api?

I am begineer and new to tandem.

I am trying to understand the git repo of tandem api/tutorial-rest in which while reading file write-asset-properties.js, I came accross variable called asset-property-id who value must be set by us and the default value given by the author is device id. I have know idea from where we need to get this value.

This screenshot of the variable

In this specific example it refers to parameter name which is part of element classification. It can be anything what helps to identify asset in the facility - i.e. serial number or any other unique identifier.

You can use Manage tab to define your own classification and define necessary parameters.