Strider MQTT

A very thin MQTT client written in C#. This library isn't a full fledged MQTT client, but made with simplicity (the first MQTT principle) in mind. It basically implements a MqttConnection that encapsulates lower level aspects of the protocol (like sockets, packet reading and writing, and so on).

The library was written using MonoDevelop, but it shouldn't require too many changes to work with VisualStudio.

Features

The current version has the following features:

• MQTT 3.1 and 3.1.1 versions;
• QoS level 0, 1 and 2;
• TCP and TLS connections;

The following also should be acknowledged.

This library does not use concurrency or parallelism internally, as it is intended to use minimum resources.

This lib provides classes for persistency. By default, it uses memory only. So if you intend to use QoS 1 or 2 in an unstable environment, prone to hardware, os or process failure, you should persist in disk. A Sqlite implementation is provided, but you can implement IMqttPersistence to suit your needs.

This lib does not guarantee ordering if more than one message is inflight per channel (incoming / outgoing).

Documentation and Help

To publish a QoS 0 "hello world" message, all you need to do is the following:

    var connArgs = new MqttConnectionArgs()
    {
        ClientId = "my-strider-client",
        Hostname = "some-broker.com",
        Port = 1883
    };

    using (var conn = new MqttConnection(connArgs))
    {
        conn.Connect();

        conn.Publish("my/test/topic",
            Encoding.UTF8.GetBytes("Hello world!"),
            MqttQos.AtMostOnce);

        conn.Disconnect();
    }

Check the wiki pages for more details.

References

The MQTT Protocol official website.

Overall architecture inspired by Mosquitto's Python client.

Packets reading and writing inspired by MqttDotNet.