RS232 Serial Port

The GW102 gateway provides an RS232-level serial port, which can be configured via resistors as either a communication serial port or a debug serial port. The PCB silkscreen is terminal J25's Pin7, Pin8, Pin9.

The physical interface diagram is as follows:

The RS232 serial port is terminal J25's Pin7, Pin8, Pin9.

The following is the silkscreen description

PCB silkscreen names: TX_232, RX_232

Device when used as a debug serial port: /dev/ttymxc0

Device when used as a communication serial port: /dev/ttymxc1