I can't figure out where I'm going wrong.. please help me!

Redfox

I need help: I have a Numa Compact 2 keyboard connected to a MIDI EVM module. I programmed the RK002 so that playing the last notes of the keyboard (from A-1 to G#1) on channel 5 sends specific Ketron sysex commands, while everything else should pass through unchanged. I wrote the code, compiled it, and uploaded it to the RK002. I connected the orange terminal to the IN port of the module and the black terminal to the OUT port of the Numa Compact, but nothing happens, not even the notes on channel 1 pass through.

I've tried everything possible, but I can't figure out where I'm going wrong. I even tried leaving the orange terminal on the MIDI interface (IN) and only moving the black connector to the OUT of the keyboard, but neither on my monitor program nor in the downloader do any messages appear.

Since programming works without issues, I don't think there are any hardware failures, so there must be something simple that I'm overlooking. Do you have any suggestions?
The simple program

#include <RK002.h>
void setup() { }
void loop() { }

should work as if it were a normal passive cable, right?

Please help me... :-(

albert

yes: the code you posted should give you a normal pass-through cable.

you state programming works without issues.. so you get feedback from the downloader that programming was successfull? How did you program the cable? Did you use the NUMA itself as a USB-MIDI interface?

maybe the Numa can't power the RK002 cable? You could test your programmed cable by connecting it to other equipment? Maybe you can put another synth in-between an utilize a THRU port for testing?

ps: did you have a look at our 'DUY' portal? (https://duy.retrokits.com/) .. here you can write code online without the need to install any compiler / development system on your own computer. Coding is done directly in the browser: the only thing you'll need is a MIDI interface capable of powering the RK002, and a webbrowser with webmidi.

Redfox

I’ve solved the issue: indeed, in the MIDI standard, pin 2 of the OUT port is not connected, but if the ground connection is missing, the RK-002 won’t power up.

The programming worked because I was using a Behringer UMC-404, but my keyboard has different wiring.

I fixed it by modifying my Numa Compact 2, connecting pin 2 of the MIDI OUT port to ground, and now everything works perfectly.

Thank you for your help!