Here are the pictures. I hope it helps.
The wiring is the same as in the ino file, all data lines use voltage divider bridges with 1.2k and 1.8kOhms resistors. The supply af the display and the LCD pin are on the 3.3V pin of the nano. Same for the ground.
Thanks again for your help.
[edit] I don't know what's happening, I can't post a second picture even in a separate post...
