Building A Sample Mqtt Application Using Linpac - ICP DAS USA LP-22 Series User Manual

7.3. Building a sample MQTT application using LinPAC

MQTT (Message Queuing Telemetry Transport) is an ISO standard publish-subscribe based
messaging protocol. It is a lightweight connectivity protocol for M2M (machine to machine)
communication that works on top of the TCP/IP protocol. The protocol uses a publish-subscribe
model for message exchange between machines, based on the efficient distribution of messages
to one or many receivers through a broker. It is useful for mobile applications because of its small
size, low power usage and minimized data packets.
The LinPAC controller provides message transfer functionality for MQTT applications. Let's look at
an example where we wish to communicate between an MQTT client and an MQTT server
(broker). The following is a demonstration of the configuration and processes involved, as
illustrated in Figure 7.3-1.
Figure 7.3-1. MQTT architecture for LinPAC
Refer to the following websites for more detailed information.
UA-5200 series:
http://www.icpdas.com/root/product/solutions/industrial_communication/m2m_iiot_server/opc_ua.html
MQ-7200M series:
http://www.icpdas.com/root/product/solutions/remote_io/mqtt_io/mq-7200m_introduction.html
AM335X-PAC Series User Manual version 2.0.1 Page: 120
Copyright © 2019 ICP DAS Co., Ltd. All Rights Reserved. E-mail: service@icpdas.com