OPC UA Server Demo

Introduction

OPC UA Server written with opcua-asyncio that exposes some nodes for demonstration purposes.

• BooleanData: boolean variable that flips its state every 10 seconds.
• PositiveTrendData: numeric (double) value that increases one unit every 5 seconds.
• NegativeTrendData: numeric (double) value that decreases two units every 5 seconds.
• TemperatureData: numeric (double) value that randomly jumps between 15 and 22 every 10 seconds.
• HumidityData: numeric (double) value that randomly jumps between 0 and 100 every 10 seconds.
• CyclicData: numeric (Int64) value that goes from -100 to 100 (and vice versa) every 200 seconds, with a 0.5 step size.
• MirrorData: a couple of boolean values (MirrorDataOriginal and MirrorDataCopy) where MirrorDataCopy mimics the MirrorDataOriginal value. Only the second one is writable.
• GPSLatitude, GPSLongitude and GPSLatitudeAndLongitude: GPS coordinate values that reproduce a circular route.

Security

The server supports two security policies:

• None (no encryption)
• Basic256Sha256

Please, ensure that valid certificate.der and key.pem files are available in the main.py python file folder before starting the server. Both files can be created using the generate_certificate.sh script.

Docker

Docker images for this application are available at: https://hub.docker.com/r/bodiroga/opcua-server-demo

The server can be easily deployed with the following command:

docker run --name opcua-server-demo -d -p 4840:4840 bodiroga/opcua-server-demo

However, in order to keep the certificates generated at startup, the /certificates folder can be mounted on the host machine:

docker run --name opcua-server-demo -d -v ~/opcua-certs:/certificates -p 4840:4840 bodiroga/opcua-server-demo

As an alternative, a docker-compose.yml file can also be used to launch the app:

version: "3"
services:
  opcua-server-demo:
    image: bodiroga/opcua-server-demo
    container_name: opcua-server-demo
    ports:
      - "4840:4840"
    volumes:
      - /path/to/certs:/certificates
    restart: unless-stopped

Author

(c) 2020 Tknika (Aitor Iturrioz)

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.