Testing Arduino Nano ESP32

[1Dodge]

Hi,
I want to build a Preset Change pedal board for Amplitube5 (works by sending ProgrammChange Commands) using my Arduino Nano ESP32, because it can do native USB and i have it lying around.

I have seen on your support list (https://tttapa.github.io/Control-Surface/Doxygen/d8/d4a/md_pages_MIDI-over-USB.html) that you have implementet MIDIUSB but not yet tesetd it.
Well i tried to setup a simple 2 button programm that sends PC0 and PC1, depending on what button i press (I'm not 100% sure if i did it right):

// This is Arduino IDE

#include <Control_Surface.h>

USBMIDI_Interface midi;

// All pushbuttons are connected to GND
PCButton btn1 {
  // Push button on pin 4:
  4,
  // PC0 on MIDI channel 1:
  {0, Channel_1},
};

PCButton btn2 {
  // Push button on pin 5:
  5,
  // PC1 on MIDI channel 1:
  {1, Channel_1},
};

void setup() {
  Control_Surface.begin();
}

void loop() {
  Control_Surface.loop();
}

Now the problem is:

• the device "TinyUSB MIDI" does show up in device manager
• yet when i press a button nothing happens (i monitor the device with MidiView)

I also only got it working when i switched to Arduino IDE. Before that i have been working on PlatformIO with VSCode but there the problem is that the library does not work at all.

platformio.ini:

[env:arduino_nano_esp32]
platform = espressif32
board = arduino_nano_esp32
framework = arduino
monitor_speed = 115200
lib_deps = tttapa/Control Surface@^2.1.0

beginning of main.cpp:

#include <Control_Surface.h>

USBMIDI_Interface midi;

and when i hover over USBMIDI_Interface i get this:

identifier "USBMIDI_Interface" is undefined

I have digged through the files and it is because of this (USBMIDI.h):

#include <AH/Arduino-Wrapper.h>
#ifdef USBCON
#include "USBMIDI_MIDIUSB.hpp"
BEGIN_CS_NAMESPACE
using USBDeviceMIDIBackend = MIDIUSB_USBDeviceMIDIBackend;
END_CS_NAMESPACE
#else
#define CS_USB_MIDI_NOT_SUPPORTED 1
#endif

USBCON is not defined. I tried to define it before including Control_Surface.h and now the identifiers work but:
in file USBMIDI_MIDIUSB.hpp the #include <MIDIUSB.h> is not working.

I don't know if this is relevant but i thought I'd include my findings.

Cheers

[1Dodge]

I just found something in this pull request (https://github.com/tttapa/Control-Surface/pull/1122/changes):

With some boards, if you get a compile error mentioning you should set "Tools->Pin Numbering set to "By GPIO number (legacy)", include this line in your platformio.ini configuration:

build_unflags = -DBOARD_HAS_PIN_REMAP

Well now the errors for identifier not found are gone, when i compile and upload it goes through, but no MIDI device shows up in device manager.

[tttapa]

Platformio does not support the required versions of the arduino-esp32 core (>=3.0.0). There doesn't seem to be any plan to add support either, see e.g. platformio/platform-espressif32#1225, so you may want to try the Arduino IDE instead.

[1Dodge]

Ok but can you tell me if i did the setup right for sending Program Change commands?

// This is Arduino IDE

#include <Control_Surface.h>

USBMIDI_Interface midi;

// All pushbuttons are connected to GND
PCButton btn1 {
  // Push button on pin 4:
  4,
  // PC0 on MIDI channel 1:
  {0, Channel_1},
};

PCButton btn2 {
  // Push button on pin 5:
  5,
  // PC1 on MIDI channel 1:
  {1, Channel_1},
};

void setup() {
  Control_Surface.begin();
}

void loop() {
  Control_Surface.loop();
}

Because even tho the device does show up, when i press a button nothing happens.