# Nodes preparation

The S2 nodes that will be installed shall be:

* marked with a label with Radio Net ID and Node ID,
* programmed with a correct firmware version using [s2-blu-programmer](https://help.boomerang3.com/s2-radio-system-manual/tools/s2-blu-programmer "mention"),
* their Radio Net ID and Node ID must be set using [s2-init-node](https://help.boomerang3.com/s2-radio-system-manual/tools/s2-init-node "mention")tool.