adafruit-circuitpython-ble-midi 1.0.3

Introduction

BLE MIDI service for CircuitPython

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-ble-midi

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-ble-midi

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-ble-midi

Usage Example

"""
This example sends MIDI out. It sends NoteOn and then NoteOff with a random pitch bend.
"""

import time
import random
import adafruit_ble
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
import adafruit_ble_midi
import adafruit_midi
from adafruit_midi.control_change import ControlChange
from adafruit_midi.note_off import NoteOff
from adafruit_midi.note_on import NoteOn
from adafruit_midi.pitch_bend import PitchBend

# Use default HID descriptor
midi_service = adafruit_ble_midi.MIDIService()
advertisement = ProvideServicesAdvertisement(midi_service)
# advertisement.appearance = 961

ble = adafruit_ble.BLERadio()
if ble.connected:
    for c in ble.connections:
        c.disconnect()

midi = adafruit_midi.MIDI(midi_out=midi_service, out_channel=0)

print("advertising")
ble.start_advertising(advertisement)

while True:
    print("Waiting for connection")
    while not ble.connected:
        pass
    print("Connected")
    while ble.connected:
        midi.send(NoteOn(44, 120))  # G sharp 2nd octave
        time.sleep(0.25)
        a_pitch_bend = PitchBend(random.randint(0, 16383))
        midi.send(a_pitch_bend)
        time.sleep(0.25)
        # note how a list of messages can be used
        midi.send([NoteOff("G#2", 120), ControlChange(3, 44)])
        time.sleep(0.5)
    print("Disconnected")
    print()
    ble.start_advertising(advertisement)

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

Documentation

For information on building library documentation, please check out this guide.