Diy MixFader Bluetooth Midi
For the software use the MocoLufa boot loader and you are able to program the Arduino again without needing to flash the boot loader. This is what the ON/OFF switch is for. READ THE MocoLUFA instructions on the link. And as a bonus the Arduino shows up and work as a normal Native USB MIDI device without the need for a emulator such as hairless MIDI etc:
Linux and macOS:
https://moco-lufa-web-client.herokuapp.com/
https://github.com/qmk/qmk_toolbox/releases
Windows:
https://moco-lufa-web-client.herokuapp.com/
https://github.com/qmk/qmk_toolbox/releases
https://github.com/tttapa/Control-Surface/releases
https://github.com/arduino-libraries/MIDIUSB/releases
Thanks to the following people who have contributed to this project:
If you want to contact me you can reach me at vuha.hau@hyper.vn.