MQTT-Client-Framework

an Objective-C native MQTT Framework http://mqtt.org

Tested with

• mosquitto
• paho
• rabbitmq
• hivemq
• rsmb
• mosca
• vernemq
• emqtt
• moquette
• ActiveMQ
• Apollo
• CloudMQTT
• aws
• hbmqtt (MQTTv311 only, limitations)

Howto

Use the CocoaPod MQTTClient!

Add this to your Podfile:

pod 'MQTTClient'

Additionally add this subspec if you want to use MQTT over Websockets:

pod 'MQTTClient/Websocket'

Or use the dynamic library created in the MQTTFramework target.

Or include the source from here.

Documentation

Usage

Create a new client and connect to a broker:

#import "MQTTClient.h"

\@interface MyDelegate : ... <MQTTSessionDelegate>
...

        MQTTCFSocketTransport *transport = [[MQTTCFSocketTransport alloc] init];
        transport.host = @"localhost";
        transport.port = 1883;

        MQTTSession *session = [[MQTTSession alloc] init];
        session.transport = transport;
        
	session.delegate = self;

	[session connectAndWaitTimeout:30];  //this is part of the synchronous API

Subscribe to a topic:

[session subscribeToTopic:@"example/#" atLevel:2 subscribeHandler:^(NSError *error, NSArray<NSNumber *> *gQoss){
    if (error) {
        NSLog(@"Subscription failed %@", error.localizedDescription);
    } else {
        NSLog(@"Subscription sucessfull! Granted Qos: %@", gQoss);
    }
 }]; // this is part of the block API

Add the following to receive messages for the subscribed topics

 - (void)newMessage:(MQTTSession *)session
	data:(NSData *)data
	onTopic:(NSString *)topic
	qos:(MQTTQosLevel)qos
	retained:(BOOL)retained
	mid:(unsigned int)mid {
	// this is one of the delegate callbacks
}

Publish a message to a topic:

[session publishAndWaitData:data
                    onTopic:@"topic"
                     retain:NO
	                qos:MQTTQosLevelAtLeastOnce]; // this is part of the asynchronous API

docs

Documentation generated with doxygen http://doxygen.org

Comparison MQTT Clients for iOS (incomplete)

Wrapper	---	----	MQTTKit	Marquette	Moscapsule	Musqueteer	MQTT-Client	MqttSDK	CocoaMQTT
			Obj-C	Obj-C	Swift	Obj-C	Obj-C	Obj-C	Swift
Library	IBM	Paho	Mosquitto	Mosquitto	Mosquitto	Mosquitto	native	native	native