Waveshare RS485 TO ETH Manual page 35

485 TO ETH (B) User Manual
version firmware that supports JSON).
Vircom version 5.17 adds two options in the JOSN to Modbus RTU settings, as shown
in the figure:
1. JSON upper layer protocol: If it is no protocol or MQTT protocol, please select the first
item: "NONE/MQTT". If it is HTTP POST, please select the second item "HTTP POST", if it is
HTTP GET, please select the third item "HTTP GET".
2. POST/GET URL: When choosing POST or GET, you must fill in the URL. For example, if the
URL is http://sacom/wri/v2, remove the http:// in front and enter sacom/wri/v2 directly .
Other JSON structure design methods are the same as the methods introduced before.
After clicking the "Save JSON Settings" button, if POST/GET is selected, HTTP header format
information will be added in front of the JSON data to support the HTTP transmission
protocol.
Figure 39 POST+JSON
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