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Ligne 7 :
Ligne 7 : − − In this simple example: − # The '''Data Emitter''' will send a message and wait 500ms for a response (ACK). − # The '''Data Receiver''' will receive the message. − # The '''Data Receiver''' will send a ACK reply. − + + + + + + + + +
→Forewords
As the kit contains contains two Pico microcontroller we will be able to create the "Data Emitter" on the CanSat as well as the Data Receiver at the ground station.
As the kit contains contains two Pico microcontroller we will be able to create the "Data Emitter" on the CanSat as well as the Data Receiver at the ground station.
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-00.jpg|640px]]
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-00.jpg|640px]]
As we will see, there are 2 key items to be highlighted:
As we will see, there are 3 key items to be highlighted:
# The frequency must be identical in the emitter and the receiver (eg: 433.1 MHz in this example).
# The frequency must be identical in the emitter and the receiver (eg: 433.1 MHz in this example).
# 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
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-00a.jpg|640px]]
In this simple example:
# The '''Data Emitter''' (CanSat) will send a message and wait 500ms for a response (ACK).
# The '''Data Receiver''' (BaseStation) will receive the message.
# The '''Data Receiver''' (BaseStation) will send a ACK reply.
== Installing the RFM69 library ==
== Installing the RFM69 library ==