Redundant Sub-Telegrams

EnOcean radio systems use the concept of redundant sub-telegrams to increase the communication reliability.

 Within this scheme, telegrams are transmitted redundantly with random (but small) delays between them. The total number of redundant sub-telegrams can be either two or three.

Certain telegram types (e.g. those used in very limited energy scenarios such as SMART ACK) do not support redundant transmission, i.e. they are transmitted only once.

 If a telegram is transmitted redundantly as set of two or three sub-telegrams, then the first sub-telegram is sent immediately upon receiving and processing the ESP3 command for telegram transmission. The timing offset between this first sub-telegram and the remaining (second or third) sub-telegrams is random within predefined time intervals.