串口（COM2 DB）
From ESS-WIKI
RS232/Debug Port (COM2)
RSB-4680 can communicate with a host server (Windows or Linux) by using debug cable
| Pin | Description |
| 1 | NC |
| 2 | COM2_TX |
| 3 | COM2_RX |
| 4 | GND |
插一张Debug口的接口图
RSB-4680 can communicate with a host server (Windows or Linux) by using debug cable
| Pin | Description |
| 1 | NC |
| 2 | COM2_TX |
| 3 | COM2_RX |
| 4 | GND |
插一张Debug口的接口图