ICP DAS USA LinPAC AM335 Series User Manual page 127

As an MQTT client, the MQ‐7200M series module is able to publish messages that related to the
status of the Digital I/O to a broker and subscribe to topics from a broker that are used to control
the DO lines. In a similar way, other MQTT clients can obtain the status information from the
Digital I/O by subscribing to a topic from the broker and then publishing messages to the broker
that then control the DO lines, as illustrated in Figure 7.3-3. An example application is
demonstrated below.
Figure 7.3-3. Controlling the device via the MQTT broker
AM335X-PAC Series User Manual version 2.0.4 Page: 127
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