Serial ports over TCP/IP with socat
This article illustrates how to realize a lan to serial gateway
Remote unit
On the remote unit install ser2net then add this line in /etc/ser2net.conf configuration file
2000:raw:600:/dev/ttyS1:115200 8DATABITS NONE 1STOPBIT
Launch ser2net:
# ser2net
Local unit
Install the socat utility.
Create a directory called $HOME/dev
Launch socat:
$ socat pty,link=$HOME/dev/ttyV0,waitslave tcp:remoteip:remoteport
Open minicom on /dev/ttyV0 and send chars to your remote port.
Examples
Serial port on stdin
socat /dev/ttyUSB0,b115200,raw,echo=0,crnl -
Remote console
Board
socat /dev/ttyS2,b115200,raw,echo=0 TCP:terzo.acmesystems.it:2002 socat /dev/ttyS4,b115200,raw,echo=0 TCP:terzo.acmesystems.it:2004
Server web
socat TCP-LISTEN:2002 PTY,link=ttyV2,raw,crnl socat TCP-LISTEN:2004 PTY,link=ttyV2,raw,crnl
Design tips
Using the RoadRunner SOM it is possible to manage up to 10 serial ports over a network link.
- Read more about the RoadRunner SOM
- Using up to 10 serial ports on RoadRunner SOM
Related links
Related products
- CPU Microchip SAMA5D27
- Cortex A5 @ 500 MHz
- Very low power consumption:
396mW in full speed mode
198mW at Linux prompt
17mW in standby mode
10mW in suspend to RAM mode - Armhf architecture
- DDR3L RAM 256 MB
- QuadSPI 0/16/64/128MB
- Size: 40x30 mm
- Plug-in module
- 200 pins 0.4 mm pitch
- TFT parallel interface
- Boot from internal Quad SPI or external uSD/eMMC
- Linux Kernel 5.15 LTS
- Debian, Buildroot and Yocto
- Open source drivers
Single Board Computer based on RoadRunner Linux SOM (Included)
- Classic "Credit Card" form factor
- Two USB Host 2.0 ports (one configurable as USB client on the USB-C connector)
- One 10/100 Mbit/s Lan port
- 2 Acme Sensor ports
- Double placements for 2.54mm pitch 20x2 pinstrips (not soldered) for GPIOS, SPI, I2C, Serial etc ports
- Credit Card footprint
