README

DIAGRAM
=======

                                                     destination2(IP2)
                                                    port2+---+
                                           +------------>x   |
                                           |             +---+
                                           |
                                           |
                                MCU        |
                             +------+      |
  source(IP1)                |      |------+         destination3(IP3)
    +---+               port1|      |               port3+---+
    |   |------------------->x      |------------------->x   |
    +---+                    |      |                    +---+
                             |      |------+
                             +------+      |
                                           |
                                           |
                                           |         destination4(IP4)
                                           |        port4+---+
                                           +------------>x   |
                                                         +---+