How to add input of integer type to the node group

To make an integer input/output in the node group:

  1. Install the BIS add-on 1.5.2. version or later,
  2. Select the desired node group in the Node Editor,
  3. In T-panel in the “BIS” tab, “Tools” section: click “+ Input” to create an input or “+ Output” to create an output in the selected node group.