MIDI.SendSysEx adds last send type to every 3 bytes

[koenschepens]

Hello,

First of all thanks for the amazing work!

I'm having problems with sending SysEx messages though. I'm trying to send SysEx from the Arduino using hiduino, but for every 3 bytes, the last sent MIDI signal byte gets added.

My code:

include <MIDI.h>

MIDI_CREATE_DEFAULT_INSTANCE();

void setup() {
MIDI.turnThruOff();
MIDI.begin();
}

void loop() {
MIDI.sendNoteOff(2,5,6);
byte sysex_message [] = { 0x7D,0x01,0x00,0x12,0x7B,0x22,0x7D,0x5D,0x7D};
MIDI.sendSysEx(sizeof(sysex_message)/sizeof(byte), sysex_message, false);
delay(1000);
}

Using MIDIMonitor, I can see this results in this:
7224485941539 From arduino_midi Note Off 6 85 02 05
7224486192131 From arduino_midi SysEx F0 F7
7224486816029 From arduino_midi Note Off 6 85 7D 01
7224487474300 From arduino_midi Note Off 6 85 00 12
7224488106447 From arduino_midi Note Off 6 85 7B 22
7224488737423 From arduino_midi Note Off 6 85 7D 5D
7224489393674 From arduino_midi Invalid 00 F7

If I change MIDI.sendNoteOff(2,5,6) to MIDI.sendNoteOn(2,5,6), the result is this:

7315676492278 From arduino_midi Note On 6 95 02 05
7315676725341 From arduino_midi SysEx F0 F7
7315677367149 From arduino_midi Note On 6 95 7D 01
7315678008872 From arduino_midi Note On 6 95 00 12
7315678647752 From arduino_midi Note On 6 95 7B 22
7315679315940 From arduino_midi Note On 6 95 7D 5D
7315679923905 From arduino_midi Invalid 00 F7

Now I understood that SysEx is not fully supported (receiving is going fine by the way). But is there any known workaround or fix to this problem?

Thanks in advance!

Yours,

Koen

[sanotronics]

something similar is happening to me

I've also posted this in the Arduino MIDI Library GH.