MIDI Interfaces

PedalinoMini supports multiple MIDI interfaces, allowing you to connect to a wide variety of hardware and software.

Available MIDI Interfaces

Interface	Description	Configuration
MIDI DIN	Traditional 5-pin MIDI connections	Requires hardware components (6N137 optocoupler or equivalent)
USB MIDI	Connect directly to computers and USB MIDI devices	Enabled by default when connected via USB
BLE MIDI	Wireless MIDI over Bluetooth Low Energy	Can be enabled in the Configuration menu
RTP-MIDI	Network MIDI over WiFi	Requires WiFi connection and configuration
ipMIDI	Multicast UDP MIDI over WiFi	Requires WiFi connection and configuration
AppleMIDI (rtpMIDI)	Apple's network MIDI protocol	Requires WiFi connection and configuration

Hardware Setup

USB MIDI using Arduino Pro Micro

See Schematic

PedalinoMini supports USB MIDI connectivity through an Arduino Pro Micro, offering a cost-effective and compact implementation. Follow these steps:

1. Software Setup:
2. Install the BlokasLabs/USBMIDI library in your Arduino IDE

3. Upload the UsbMidiConverter example sketch to your Arduino Pro Micro

4. Hardware Connections:

   ESP32                Arduino Pro Micro
   -----                ---------------
   GPIO18 (RX)    →     Pin 1 (TX0)
   GPIO19 (TX)    →     Pin 2 (RX1)
   GND            →     GND (required)
   

5. Hardware Notes:

6. A 3.3V Pro Micro board is recommended
7. 5V Pro Micro boards can also work as the ESP32 is typically 5V tolerant
8. The Arduino Pro Micro draws power directly from the USB MIDI connection

IMPORTANT: Ensure the ESP32 board and Arduino Pro Micro share a common ground connection.

MIDI DIN

See Schematic

The standard 5-pin DIN MIDI interface requires the following connections:

ESP32         MIDI
------        ----
TX2 (GPIO2)  MIDI OUT
RX2 (GPIO4)  MIDI IN (through optocoupler circuit)