User Manual
Your TrustWorthy Industrial IoT Partner
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Fig. 158
Message reported
9.5.
Data query
There are three methods to actively query the data collected through the serial port from the communication channel: Json format,
Modbus TCP, Modbus RTU. Firstly, user need enable the data query function.
9.5.1. Json
When select MQTT or AWS IOT channel, user need configure the MQTT broker parameters in MQTT Gateway tab or Cloud service
tab at first, select Json query type and setting the query topic in the Fig.159. The report topic is same as described in section 9.4.1.
Fig. 159
JSON query type
The Json content need conform to template described in section 9.4.3.
