USR-W630s User Manual
5.2.5.2. Subscribe/Publish Topic
The topic adding function is mainly used to add publishing or subscribing topics. Configuration parameters
include basic parameters such as name, TOPIC, QOS , and whether to retain messages. The function of serial port
association is to associate the topic with a certain serial port. When publishing, the original data of the serial port
will be used as the payload of this topic. When receiving the subscription message, the payload of the subscribed
topic will be sent to the serial port as the original data.
Note: Up to 16 topic rules can be set.
Figure 35. MQTT topic settings
Table 11. Detail parameters of MQTT
Topic type: optional publish/subscribe
Topic message quality, configurable:
0 at most once
at least 1 time
Accurate once
Set whether to retain the message, ON (retain)/OFF (not retain )
COM1-485: Data is transmitted by RS485 only.
COM2-232: Data is transmitted by RS485 only.
COM1+COM2：Data is transmitted by RS485 and RS232 both.
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