Serial port mapping

See the table below to find out how the physical RS485 serial port lines are mapped into Linux ports within /dev/.


Alternatively, all serial ports mentioned below are also accessible via /dev/extcomm/Y/X, where Y is the number of section, and X is the number of the serial port. X and Y are counted from 0.

RS485-1.1 RS485-2.1 RS485-3.1 GSM
S103 ttyNS0 x x x
S103-G ttyNS0 x x ttyAMA0
M103 ttyNS0 x x x
M203 ttyNS0 x x x
M303 ttyNS0 x x x
M403 ttyNS0 x x x
M503 ttyNS0 ttyNS1 x x
M523 ttyNS0 ttyNS1 x x
L203 ttyNS0 x x x
L303 ttyNS0 x x x
L403 ttyNS0 x x x
L503 ttyNS0 ttyNS1 x x
L523 ttyNS0 ttyNS1 x x
L513 ttyNS0 ttyNS1 ttyNS2 x
L533 ttyNS0 ttyNS1 ttyNS2 x

USB converters (FTDI, CH34x, PLxxxx and CPxxxx) are also supported by default. For using other gateways or devices, installation of drivers is necessary.

USB1 /dev/serial/by-port/0
USB2 /dev/serial/by-port/1
USB3 /dev/serial/by-port/2
USB4 /dev/serial/by-port/3