plcwatchd

• Observe plc state of a simatic plc using snap7.
• Send push notifications via pushover-api in case of plc left RUN state.
• Run as a linux-daemon process

build and install

precondition

• sudo add-apt-repository ppa:gijzelaar/snap7
• sudo apt-get update
• sudo apt-get install libsnap7-dev libsnap7-1
• sudo apt-get install libcurl4-gnutls-dev
• sudo apt-get install rapidjson-dev

build

• cd Release
• make clean all
• cd ..

install

• sudo cp Release/plcwatchd /usr/local/bin/
• cp plcwatchd.service.draft ../plcwatchd.service
• vi plcwatchd.service
• sudo cp plcwatchd.service /etc/systemd/system
• sudo systemctl enable plcwatchd

Service

start

• sudo systemctl start plcwatchd

stop

• sudo systemctl stop plcwatchd

status

• sudo systemctl status plcwatchd or
• ps aux | grep plcwatchd

Docker

There is also a docker image: docker pull feilner/plcwatchd

Environment variables

• PUSHOVER_KEY pushover.net user key (mandatory)
• PUSHOVER_TOKEN pushover.net appliacation token (mandatory)
• PLC_IP address of the plc (mandatory)
• CLI_ARGS optional command line interface args to plcwatchd (optional)

Optional arguments to plcwatchd can added by the optional CLI_ARGS

 -v    verbose
 -p    polling rate of the PLC state in seconds, default 10
 -c    retry - pushover.net retry parameter in seconds, default 60
 -e    expire - pushover.net expire parameter in seconds, default 600
 -u    user - pushover.net comma seprated device list e.g. "deviceOne,deviceTwo", default all devices
 -r    rack - rack of the plc, default 0
 -s    slot - slot of the plc, default 2

Run from command line:

docker run -it --rm -e PUSHOVER_KEY=pushoverKey -e PUSHOVER_TOKEN=pushoverToken -e PLC_IP=plcIP -e CLI_ARGS "-u pushoverDeivce"  feilner/plcwatchd

Example docker-compose.yml:

  plcwatchd:
    image: feilner/plcwatchd
    container_name: plcwatchd
    restart: always
    environment:
    - PUSHOVER_KEY=pushoverKey
    - PUSHOVER_TOKEN=pushoverToken
    - PLC_IP=plcIP
    - CLI_ARGS="-u pushoverDeivce"