A Level 1 EnOcean repeater retransmits every received telegram (extending the range), while a Level 2 repeater also retransmits telegrams already forwarded by other repeaters (allowing wider cascading at the cost of higher loop risk).

EnOcean repeaters extend RF coverage with strict topology limits to keep the spectrum clean. A Level 1 repeater accepts only original telegrams and adds a single hop (Sender then Repeater then Receiver). A Level 2 repeater also forwards telegrams that are already marked as repeated, allowing a two-hop chain (Sender then R1 then R2 then Receiver). Level 3 and above are explicitly forbidden by the specification to prevent traffic explosion and broadcast storms. Configuration is done via a dedicated button or a manufacturer tool.

Always start a site survey assuming Level 1; you should only enable Level 2 after a measured RSSI scan confirms that no single repeater can cover the gap, otherwise you create more interference than you cure.