How to program an nRF52 DK to send BLE MIDI message when I push a button?

[joneves]

Hi! I'm new developing using real C language. I have more experience using Arduino. I'm trying to send a MIDI message over Bluetooth MIDI when I push one of the buttons of my Nordic nRF52 DK. But I'm not being successful. How can I do that?

I tried to use this tutorial: https://www.novelbits.io/bluetooth-gatt-services-characteristics/ Everything works fine and I'm able to create a discoverable BLE MIDI device. But I'm stuck setting a way to send actual MIDI messages. I've made a test simply using the buttons to turn on/off the DK LEDs and here it's everything fine.

How can I modify this example in order to send some type of MIDI message when I push a button?
This is fairly easy for me using Arduino, but I want to learn a bit more about "proper" embedded software programming and also be able to use more recent SoftDevices (Arduino one is S132 maximum).

[Edvin]

Hello,

The BLE MIDI service is not a service that is officially included/supported in our SDKs, but I suggest you take a look at this blog post, written by one of my colleagues:

https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/midi-over-bluetooth-le

Best regards,

Edvin

[joneves]

Thank you!
I still need to study it a bit better (and I'm still with some issues), but that tutorial is great!
And it's working...kind of, the code part doesn't work with a specific device that I tried, but works with others