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# The encryption key must be identical on the both side.
# The encryption key must be identical on the both side.
# Node_IDs used to allow ACK exchange between nodes
# Node_IDs used to allow ACK exchange between nodes
In this simple example:
In this simple example:
# The '''Data Receiver''' (BaseStation) will receive the message.
# The '''Data Receiver''' (BaseStation) will receive the message.
# The '''Data Receiver''' (BaseStation) will send a ACK reply.
# The '''Data Receiver''' (BaseStation) will send a ACK reply.
The following sequence diagram (click to enlarge) shows how the calls takes place within scripts, within the library and within the air.
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-00a.jpg|640px]]
== Installing the RFM69 library ==
== Installing the RFM69 library ==