Any ideas? How can I debug problems like this?

I tried using the setup part of the second program in the first one. This is what I ended up with:
/*
Based on:
BLE_MIDI Example by neilbags
https://github.com/neilbags/arduino-esp32-BLE-MIDI

Based on BLE_notify example by Evandro Copercini.

Creates a BLE MIDI service and characteristic ...

Hi, thank you for your response.

I tried the first sketch in that GitHub issue, but it doesn't work for me. Windows behaves the same (Windows says connected, ESP says "notifications are disabled", ESP says disconnected, Windows still says connected). Fluidsynth on Android finds the ESP, and it ...

Hi, I'm trying to use Bluetooth Low Energy to send and receive MIDI messages.

There are 2 main problems:

1. On Linux (using BlueZ 5.50), it works, and the MIDI events show up in my MIDI monitor. However, after some time (ranging from a couple of seconds to many minutes), it randomly disconnects ...