Waveshare RS485 TO ETH - Page 35

485 TO ETH (B) User Manual
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version firmware that supports JSON).
Figure 39 POST+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.