vssavin/serial-server

RS-232 to TCP/IP proxy written in Java

Serial Communications Network Proxy

This little RS-232 <-> TCP/IP proxy written in Java was developed by me to be able to pull data from a weater station (Davis Vantage Pro2) connected to the serial (RS-232) port on a Ubuntu Linux server. The service has been running 24x7x365 since 2008 and is still running, collecting data every 10 minutes.

Build

./gradlew

Prerequisites for running serialserver on Ubuntu

librxtxSerial.so from RXTX lib is required.

sudo apt-get install librxtx-java

Device permissions.

Make sure the user has rw permissions on the device.

$ ls -l /dev/ttyS0
crw-rw---- 1 root dialout 4, 64 2011-03-05 19:40 /dev/ttyS0

sudo adduser <username> dialout

Serial Server start script (serialserver.sh)

#!/bin/bash
#
SERIAL_HOME=$HOME
SERIAL_PORT=/dev/ttyS0
SERIAL_BAUD=9600
SERIAL_TCP=8888

cd $SERIAL_HOME

stty -F $SERIAL_PORT $SERIAL_BAUD sane clocal crtscts -hupcl -icrnl -opost -onlcr

java -classpath $SERIAL_HOME/serialserver-1.1.jar:$SERIAL_HOME/RXTXcomm.jar se.technipelago.serial.SerialServer $SERIAL_PORT 2000 $SERIAL_TCP

Start the serial server

serialserver.sh

Test communicating with the server

telnet localhost 8888
at
OK
kill
Connection closed by foreign host.