Mqtt - Do Example; Mqtt Do - Subscribe - ICPDAS ET-2268 CR User Manual

ET-2200 Series Ethernet I/O Modules

4.16.3 MQTT - DO Example

The topic name of MQTT is composed of Main Topic Name (e.g., ICPDAS/, refer to
Sub Topic Name (e.g., do_all), which can be set on the MQTT - DO page.
The MQTT – DO page provides the following functions:
Function
Subscribe
Power-on Publish
State-Change Publish The DO statuses will be published whenever it changes.
Periodic Publish
MQTT DO – Subscribe
Users can choose to enable/disable single-channel (DO0, DO1, etc.) or multi-channel (ALL) for
topics operations. It is recommended to use multi-channel operations to reduce network traffic
and to disable unused topics to reduce unnecessary processing and improve operational efficiency.
Copyright © 2023 ICP DAS CO., Ltd. All Rights Reserved.
Description
Used to subscribe to the topic. The DO statuses can be changed through
MQTT messages
The DO statuses will be published upon module power-up
The DO statuses will be published periodically, based on the Cycle
settings.
1
.
MQTT page) and
2
.
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