BLE MIDI Converter

This repository is for code that converts BLE midi into DIN midi. It is discussed in the SparkFun MIDI BLE Tutorial

Contents

• standard-midi-ble -- The main application to create a BLE MIDI dongle.
• ble-to-din -- Just the BLE packet parser to serial MIDI out
• din-to-ble -- Just the serial MIDI in to BLE packet builder
• midi-lib-starter -- an empty shell with MIDI and BLE configured
• ble-starter -- an empty shell with just BLE configured
• test-programs
  • ble-test -- simple rx of BLE packets, prints sizes
  • midi-test -- simple TX of midi messages over DIN
  • parserUnitTest -- Exercise of BLE MIDI packet decoder
  • serial-test -- Simple serial test
• documentation -- Right now, only output of ble-test during Tsunami app transmission

Hardware requirements

• nRF52832 Breakout
• MIDI shield -- only populate MIDI jacks.

Connections:

nRF Pin	MIDI Shield Pin
GND	GND
3.3V	5V
26(RX)	RX
27(TX)	TX
11	7 (Red LED)
12	6 (Green LED)

Software

Requirements

• nRF52832 Arduino board package -- see nRF52832 Breakout Hookup Guide
• BLE library -- API doc
• FortySevenEffects Midi Library

Status

• BLE to Serial MIDI
  • Decodes all forms of BLE MIDI data
  • SysEx ignored
  • BLE timestamps ignored
• Serial MIDI to BLE
  • Converts all MIDI messages to Full type
  • Applies timestamp
  • SysEx ignored

Bugs / Future Work

• Serial port locks at boot sometimes, needs reset button press.
• When uploading a lot of tests, sometimes connection won't hold - connecting other devices sometimes resolves this, or try renaming the device in firmware.