https://github.com/peza/opcua-historizing-db
Demo for Opcua Server-Client Historizing data from and to DB SQLite
https://github.com/peza/opcua-historizing-db
historizing inmemory-db nodejs opcua opcua-client opcua-server sqlite
Last synced: 3 months ago
JSON representation
Demo for Opcua Server-Client Historizing data from and to DB SQLite
- Host: GitHub
- URL: https://github.com/peza/opcua-historizing-db
- Owner: peza
- License: apache-2.0
- Created: 2024-09-11T17:39:40.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2024-09-11T18:52:29.000Z (9 months ago)
- Last Synced: 2025-01-20T21:17:58.150Z (4 months ago)
- Topics: historizing, inmemory-db, nodejs, opcua, opcua-client, opcua-server, sqlite
- Language: JavaScript
- Homepage:
- Size: 23.4 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# opcua-historizing-db
Demo for Opcua Server-Client Historizing data from and to in-memory DB SQLite
## Overview
This project is a demonstration of an OPC UA Server-Client setup that uses SQLite as an in-memory database to store and manage historical data. It is a Node.js project that showcases how to historize data from an OPC UA server into an SQLite database and retrieve it efficiently.
## Keywords
- OPCUA
- OPCUA Server
- OPCUA Client
- Node.js
- SQLite
- Inmemory db
- Data Historizing from DB
- Real-Time Data
## Setup
1. **Clone the Repository:**
```sh
git clone https://github.com/yourusername/opcua-historizing-db.git
cd opcua-historizing-db
# Install Dependencies:
npm install
# Start the App:
npm start
# Implementation details
Server: The OPC UA server runs on localhost at port 4844.
It exposes one variable with the node ID ns=1;s=Temperature.
- The server maintains an in-memory SQLite database to store temperature data.
- A new temperature value is generated every second.
- An event named newTemperatureValue is emitted every time a new temperature value is generated.
- This event triggers the saving of the new temperature value to the SQLite database and updates value of the OPC UA variable ns=1;s=Temperature.
- The server get historic data by fetching data from the database.
- The maxOnLineValues for the variable is set to 1, meaning no default buffering for the variable is done.
Client: Connects to the server and subscribes to changes of the temperature variable.
- Reads historical data every 5 seconds.
- Currently, there is no limit on the number of records to read from the server.
- The client is set to read the last 20 minutes of data for the variable.
# License
- This project is licensed under the MIT License. Please include appropriate attribution when using this code.
# Notes
- Make sure to have Node.js and npm installed to run the project.
- For any issues or contributions, please refer to the Contributing Guidelines or open an issue on the GitHub repository.
- Feel free to adjust any specifics to match the exact details of your project and its configuration.
## Topics
- OPCUA
- OPCUA Server
- OPCUA Client
- Node.js
- SQLite
- Inmemory db
- Data Historizing from DB
- Real-Time Data