Du côté Arduino On Arduino side, only a simple sketch is needed then to open the serial line to Pi and send some drawing commands. Note that you cannot upload a sketch to the Arduino while RX pin is connected to the Pi, so you should always remove the jumper wires from TX/RX pins on the Arduino before uploading:
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Du côté Arduino, vous n'avez besoin que d'un simple programme (sketch). Il ouvre la connexion série vers le Pi et envoi les différentes commandes d'affichage.
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=== Upload du programme ==
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Note that you cannot upload a sketch to the Arduino while RX pin is connected to the Pi, so you should always remove the jumper wires from TX/RX pins on the Arduino before uploading: