Bluetooth (BLE) peripheral support (e.g. Simionic G1000)

[GregWoods]

I have written a simple C++ command line app which connects to a pair of "bare" (no iPad) Simionic G1000 units. It maps the inputs to calculator code presets stored in a config file, and send the command to MSFS. Source is here https://github.com/GregWoods/MSFS_BluetoothLE_Bridge

The Simionic units use a very simple protocol. Once the client software is connected, each button press or rotary encoder input, sends a single byte to the connected client.
It struck that that would be a great protocol for home brewed peripherals. The Raspberry Pi Pico has BLE support built in. It would save a lot of wiring, especially for rigs that need to be disassembled regularly.

Whilst my C++ command line app works, it could be:

1. More robust
2. Have a nicer UI than a command line app and a txt config file
3. Work with XPlane

In other words, a BLE connected device sounds like a perfect addition to MobiFlight-Connector, and the Pico firmware.

I'd like some feedback from the contributors and community on whether BLE connected input devices are a good idea? And if so, are there any reasons not to use the Simionic "one-byte per input event" protocol?

Thoughts?