The GW102 gateway provides an RS232 serial port, which can also be configured as a communication serial port or a debugging serial port via resistors.
The physical drawing of the interface is as follows：
Linux device name when used as a communication serial port：/dev/ttymxc1
Shell silkscreen name：COM3
| Shell Silkscreen Name | Description |
|---|---|
| T | RS232 Tx |
| R | RS232 Rx |
| G | RS232 GND |