MIDI Forum

It worked! Buf_len now is multiple of four and I added a padding on the last chunk to complete the "fourtet". It works. Thank you for the support.

Thank you Clemens, I'll add a padding of 0s on the last chunk after the "sysex_end" and I'll try.

Ok, I just rewrote a "generic" function that fills my tx buffer with only the necessary bytes (there's no check on max length since it's not necessary...

It didn't work. Still having the same problem even with a complete 32Bytes buffer and a complete 64Bytes buffer.

Good question Clemens! I tried to send 4bytes packets but it didn't work. Now I will try to complete a 32 bytes buffer and I'll tell you if it works. ...