PitchBend Midi Arduino Uno

Projects General Guidance
1

Hello everyone!

I have an old keyboard (Yamaha PSR-250) that I would like to enhance by adding an Arduino pitch bend using midi. This keyboard does not have any modulation or pitch bend wheel installed (I want to create my own if it is possible), but still, my keyboard can handle midi messages.

I'm using an Arduino Uno (Chinese) and I have all the hardware needed (I think so): midi cable (2 of them), midi 5 DIN (2 as well) to plug my cable, and a joystick to make the pitch bend wheel.

I don't know how to modify a note (in this case the note's pitch) while I'm playing on the keyboard.

For the moment I only send messages from my Arduino to my keyboard.
Do I need to send messages in the other way in order to get the pitch of the note that I'm currently playing before sending back the note to the keyboard with the extra pitch given by the joystick? I hope that there is a simpler way to do it if it is possible.

I did some researches on the web and found this Instructables but that is not really what I need: https://www.instructables.com/id/Send-and-Receive-MIDI-with-Arduino/.

I will appreciate any help.

I don't know if I make myself clear. Feel free to ask for more information.

Thanks !