vibe-mqtt

MQTT broker client library written completely in D.

API documentation

MQTT protocol version supported: 3.1.1

Depends on: vibe.d

Tested on:

• RabbitMQ with MQTT plugin enabled - Doesn't support QoS2
• Mosquitto

Supported MQTT 3.1.1 features:

• QoS0, QoS1 and QoS2 messages handling
• Authentication
• Session state storage (currently in memory only - #20)
• Sending retain messages
• Async API (publish blocks if send queue is full)
• Data agnostic
• Message ordering
• KeepAlive mechanism support (PingReq/PingResp) (#11)
• Auto reconnect to broker (#15)
• TLS/SSL (#16)
• On subscribe topics validation (#17)
• Last Will and Testament (LWT) (#21)
• Delivery retry (#14)

Pull Requests are welcome, don't be shy ;)

Usage

Example code can be found in the examples directory.

Publisher

Simple publisher which connects to the MQTT broker and periodically sends a message. Implicitly it connects to 127.0.0.1:1883

auto settings = Settings();
settings.clientId = "test publisher";

auto mqtt = new MqttClient(settings);
mqtt.connect();

auto publisher = runTask(() {
        while (mqtt.connected) {
            mqtt.publish("chat", "I'm still here!!!");
            sleep(2.seconds());
        }
    });

Subscriber

Simple subscriber which connects to the MQTT broker, subscribes to the topic and outputs each received message. Implicitly it connects to 127.0.0.1:1883

auto settings = Settings();
settings.clientId = "test subscriber";
settings.onConnAck = (scope MqttClient ctx, in ConnAck packet)
{
    ctx.subscribe(["chat"]);
};
settings.onPublish = (scope MqttClient ctx, in Publish packet)
{
    writeln("chat: ", cast(string)packet.payload);
};

auto mqtt = new MqttClient(settings);
mqtt.connect();