Codabix.Web.SignalR

Real-time communication framework for .NET using SignalR and the industrial IoT Middleware Codabix as backend. Using Codabix any IIoT Entity (PLCs, DBs, Files, Sockets, Ports, IOs ...) can be connected to each other just using Nodes.

This package provides the API required to implement custom client applications using SignalR on top of WebSocket as the transport layer to connect to the communication data bridge for things (Codabix).

Features:

• Authentication using JSON Web Token
• Create, Read, Update & Delete IIoT Entities
  • Setup new connection channels
  • Configure symbols, files, tables, ...
  • Subscribe change notifications
• Read & Write Values of IIoT Entities
  • Directly from the Web to a device, file, table, ...
  • Using custom Human Machine Interfaces (HMI)
  • Visualize processes using historical data

The whole framework is provided for free and can be used for commerical and non-commerical application development.

Getting Started

At first you need an installed and running Codabix. Just go to https://www.codabix.com/en/downloads to get a latest evaluation version for free and without registration.

The most essential snippet to dig in:

using Codabix.Web.SignalR;
...
var client = new CodabixClient("http://localhost:8181", "username", "password");
await client.ConnectAsync();

// Your code to interact with Codabix.

Let's Read a Node

var response = await client.ReadNodeValueAsync("/Nodes/TestValue");

Let's Write a Node

var response = await client.WriteNodeValueAsync("/Nodes/TestValue", "Hello World!");

Let's Subscribe to value changes of a Node

var subscriptionParameters = new NodeValueSubscriptionParameters {
    Nodes = new CodabixNodeQueryIdentifier[] {
        "/Nodes/TestValue"
    }
};
var subscription = await client.SubscribeValueChangesAsync(subscriptionParameters);
while (await subscription.WaitToReadAsync()) {
    while (subscription.TryRead(out var eventArgs)) {
        Console.WriteLine(
            $"Node: {eventArgs.Node}, " +
            $"Old Value: {eventArgs.OldValue.Value}, " +
            $"New Value: {eventArgs.NewValue.Value}");
    }
}