*********************************************************************************
*                                                                               *
*                                                +-------------+                *
*                                                |  Internet   |                *
*                                                +-------------+                *
*                                                  |                            *
*                                                  |                            *
*                                                  |                            *
* +----------------+                             +-------------+                *
* |  Host machine  |-----------------------------| VLAN Switch |                *
* +----------------+                             +-------------+                *
*   |                                              |                            *
*   |                                              |                            *
*   |                                              |                            *
* +----------------+     +-----------------+     +-------------+     +--------+ *
* |    USB Hub     | --- | Power Controler | --- |  RockPro64  |     | 12V PS | *
* +----------------+     +-----------------+     +-------------+     +--------+ *
*   |                      |                       |                   |        *
*   |                      +-----------------------+-------------------+        *
*   |                                              |                            *
* +----------------+                               |                            *
* | Serial adapter |-------------------------------+                            *
* +----------------+                                                            *
*                                                                               *
*********************************************************************************