SysEx With Arduino

Using Arduino Programming Questions
1

I am able to read and send SysEx commands to my digital mixer with PocketMIDI with a midi to usb cable. It really seems to work well. Now, I would like to read and send SysEx with my Arduino. I've tried these few simple commands to set a fader to 0db and then down to infinity and back over and over, with no success:

#include <MIDI.h>
byte onsysexArray[18] = {0xF0, 0x43, 0x10, 0x3E, 0x12, 0x01, 0x00, 0x33, 0x00, 0x00, 0x00, 0x37, 0x00, 0x00, 0x00, 0x06, 0x37, 0xF7};
byte offsysexArray[18] = {0xF0, 0x43, 0x10, 0x3E, 0x12, 0x01, 0x00, 0x33, 0x00, 0x00, 0x00, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF7};
MIDI_CREATE_DEFAULT_INSTANCE();
void setup() {
MIDI.begin();
}

void loop() {
MIDI.sendSysEx(18, onsysexArray, true);
delay(10000);
MIDI.sendSysEx(18, offsysexArray, true);
}

I'd also like to read the positiion of the fader. What am I missing? Thanks again for the help!

2

First: Edit your post and insert code tags!

You explain how you connect your MIDI system to the PC but there's no word about how you connect it to your Arduino. MIDI is a current loop system so a direct connection isn't possible. Post a complete wiring diagram and links to the used hardware!