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MQTT C example: Difference between revisions
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<seo title="MQTT C Example | RidgeRun Developer" titlemode="replace" keywords="MQTT, message broker, publisher, subscriber, publisher-subscriber, metadata, message sharing, C example." description="RidgeRun explains how to use MQTT with C. Learn how to easily test an MQTT C example!"></seo> | |||
=What is MQTT?= | =What is MQTT?= | ||
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</pre> | </pre> | ||
The configuration of the publisher is as follows: | |||
<pre> | |||
#define ADDRESS "tcp://mqtt.eclipseprojects.io:1883" | |||
#define CLIENTID "ExampleClientPub" | |||
#define TOPIC "MQTT Examples" | |||
#define PAYLOAD "Hello World!" | |||
</pre> | |||
Where each parameter represents: | |||
* '''ADDRESS''': Address where the message broker server is running. This address typically includes the protocol (e.g., tcp), the broker's hostname or IP address, and the port number. | |||
* '''CLIENTID''': Identifier of the client connected to the broker | |||
* '''TOPIC''': Topic to which the publisher will send messages | |||
* '''PAYLOAD''': This is the example message content that will be published, this is important in the context of this app, but it will change dynamically depending on the application. | |||
==Creating Subscriber== | ==Creating Subscriber== | ||
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</pre> | </pre> | ||
* The app will remain active listening for messages until the user closes it. | * The app will remain active listening for messages until the user closes it. | ||
The configuration of the subscriber is as follows: | |||
<pre> | |||
#define ADDRESS "tcp://mqtt.eclipseprojects.io:1883" | |||
#define CLIENTID "ExampleClientSub" | |||
#define TOPIC "MQTT Examples" | |||
</pre> | |||
Where each parameter represents: | |||
* '''ADDRESS''': Address where the message broker server is running. This address typically includes the protocol (e.g., tcp), the broker's hostname or IP address, and the port number. | |||
* '''CLIENTID''': Identifier of the client connected to the broker | |||
* '''TOPIC''': Topic to which the subscriber will connect to receive messages. | |||
{{ContactUs}} | |||
[[Category:HowTo]] | |||