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Ligne 239 :
Ligne 239 : − + Ligne 246 :
Ligne 246 : − + Ligne 253 :
Ligne 253 : − + Ligne 311 :
Ligne 311 : − + − + + + Ligne 333 :
Ligne 335 : − * 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). − + − NODE_ID = 100 # ID of this node − + + + + + − + + + + + + + + + + + Ligne 356 :
Ligne 369 : − + − − [[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-20.png|640px]] − Voilà, We are ready to test the emitter (cansat).+ − +
→The Emitter
{{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}} }}
{{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}} }}
== The Emitter ==
== The Emitter (CanSat) ==
The emitter can be made 2 different ways (shown below).
The emitter can be made 2 different ways (shown below).
Only the script content will changes between the emitter and the receiver.
Only the script content will changes between the emitter and the receiver.
=== Wiring option 1 : as the receiver ===
=== Emitter Wiring 1 : as the receiver ===
wiring (visible here before) is identical to the receiver wiring.
wiring (visible here before) is identical to the receiver wiring.
(see the [[ENG-CANSAT-PICO-RFM69HCW-TEST#Wiring|Receiver]] section for more details about the connections).
(see the [[ENG-CANSAT-PICO-RFM69HCW-TEST#Wiring|Receiver]] section for more details about the connections).
=== Wiring option 2: with the Kit Cansat for Pico ===
=== Emitter Wiring 2: with the Kit Cansat for Pico ===
{{pl|2271|Kit Cansat avec Raspberry-Pi Pico}} have a Raspberry-Pi Pico soldered onboard. The RFM69 module can be soldered on the UEXT connection points available between the Pico and the Ribbon connector.
{{pl|2271|Kit Cansat avec Raspberry-Pi Pico}} have a Raspberry-Pi Pico soldered onboard. The RFM69 module can be soldered on the UEXT connection points available between the Pico and the Ribbon connector.
{{traduction}}
{{traduction}}
=== The code ===
=== Emitter code ===
Now we will load and executes the {{fname|test_emitter.py}} emitter script. The script must be downloaded from the repository.
Now we will load and executes the {{fname|test_emitter.py}} emitter script for the CanSat.
The script must be downloaded from the repository.
{{traduction}}
{{traduction}}
* The '''frequency''' used by the receiver RFM69HCW must be exactly the same as the emitter!
* 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 '''Encryption key''' used by the receiver RFM69HCW must be exactly the same as the emitter!
Locate the following lignes:
Locate the following lines:
<syntaxhighlight lang="python">FREQ = 433.1
<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"
ENCRYPTION_KEY = b"\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08"
</syntaxhighlight>
</syntaxhighlight>
And update the value for '''FREQ''' and '''ENCRYPTION_KEY'''.
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|'''Update BaseStation ID:'''}}
* 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 CanSat emitter must sent the messages (and from which the ACK response are expected).
Locate the following lines:
{{underline|'''Openning the Serial Line:'''}}
<syntaxhighlight lang="python">NODE_ID = 120 # ID of this node
BASESTATION_ID = 100 # ID of the node (base station) to be contacted
</syntaxhighlight>
The NODE_ID and BASESTATION_ID are preconfigured and doesn't need to be updated (they can be updated for test purpose).
{{underline|Note:}} the frequency & encryption key are enough to "isolate groups". Nodes ID are used to create mesh network within a group. A simple mesh with 2 nodes: the Receiver base station and the Emitter CanSat.
{{underline|'''Opening 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.
As we want to see the received message, we will open a terminal to receives the messages over the USB-Serial line.
* mpremote
* mpremote
Just starts the script and wait for the messages to come:
Just starts the script it will start to send messages to the base station:
[[Fichier:ENG-CANSAT-PICO-RFM69HCW-TEST-30.png|640px]]
{{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}} }}
{{ambox|text=IF the file {{fname|test_emitter.py}} is copied to the micropython board THEN it can be started from REPL<br />with {{fname|import test_emitter}} }}
== More info ==
== More info ==