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=== The code ===
Now we will load and executes the {{fname|test_emitter.py}} emitter script. The script must be downloaded from the repository.
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TODO DOWNLOAD
The script can be either executed from Thonny -OR- transfered to the Pico and executed directly on the microcontroler.
It will output the messages on the REPL/Shell over the serial line.
{{ambox-stop|text=We will have to modify the script before executing it!}}
The frequency and encryption key must be updated from team to team to avoids messages collisions and cross-over transmission between the teams.
Ask the organizer for your team frequency according to the [[ENG-CANSAT-PICO-FREQUENCY-PLAN|Frequency Plan ]]
{{underline|'''Update for frequency plan, encryption key:'''}}
* The '''frequency''' used by the receiver RFM69HCW must be exactly the same as the emitter!
* The '''Encryption key''' used by the receiver RFM69HCW must be exactly the same as the emitter!
* The '''Node ID''' is unique node identifier (0..255). This also the node ID where the base station (the receiver) must send the ACK the response.
* The '''BaseStation ID''' the node id (0..255) where the emitter must sent the messages (and from which the ACK response are espected).
Locate the following lignes:
<syntaxhighlight lang="python">FREQ = 433.1
ENCRYPTION_KEY = b"\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08"
NODE_ID = 100 # ID of this node
</syntaxhighlight>
And update the value for '''FREQ''' and '''ENCRYPTION_KEY'''.
The NODE_ID doesn't have to be updated, its is used as node identifier allowing message & ACK exchange between one receiver and several emitter (each having an unique NODE_ID (for the same ENCRYPTION_KEY and FREQ).
{{underline|'''Openning the Serial Line:'''}}
As we want to see the received message, we will open a terminal to receives the messages over the USB-Serial line.
This can be done with the help of:
* Thonny IDE (that will automatically open the USB-Serial port)
* Putty (just open the USB-Serial port)
* mpremote
Just starts the script and wait for the messages to come:
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-20.png|640px]]
Voilà, We are ready to test the emitter (cansat).
{{ambox|text=IF the file {{fname|test_receiver.py}} is copied to the micropython board THEN it can be started from REPL<br />with {{fname|import test_receiver}} }}
== More info ==
== More info ==