v2
==

fixes:

- RDM LED (was on even without traffic)
- add terminal text

changes:

- add button to start MCU bootloader

v1
==

simple RDM splitter.
v0 + RDM capabitlity added.
detects and forwards RDM traffic from RJ45 to XLR.

issues:

- DMX_OUT should be on PB10/PB11, not PB11/PB12
- RDM LED is on, because the signal line is not driven

v0
==

simple DMX splitter.
forwards DMX512 data from XLR to RJ45 (ANSI E1.11-2008 §7).
adds 6-60V 2A passive PoE (802.310/100 mode B).

never tested.
