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How MQTT Publisher Send Publish message to MQTT Server in Contiki-NG?


Sending of a message from client is known as publisher.

Publisher can send the publish message as soon as it connects to a broker.

Each publish message contains a topic that the broker can use to forward the message to interested clients.Typically each message has a payload which contains the data to transmit in byte format.

Step 1

Open a source file in the following location >> contiki-ng/examples/mqtt-client/mqtt-client.c Code : mqtt-client.c

Step 2

Run the simulation

Step 3

After connecting border router to server use three terminal window for mosquitto publisher,subscriber and MQTT broker for receiving control messages.

Step 4

Mote Output