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REST API server data communication - MGharat - July-20th-2021
Hi Armin,
one of our customer wants to use REST APIs & communicate with his server software . Further this server data is to be passed to an OPC UA client through our netPI gateway.
I attached herewith customer software RESET API document for your reference.
Can we use here netPI RTE to collect data from customer server ( over eth0) REST API communication & then transfer it to OPC-UA ( over Fieldbus port) ?
BR
MAdhumati
RE: REST API server data communication - Armin@netPI - July-20th-2021
Well,
Node-RED supports a "http request" node ever since which is used to call RESTapi functions like GET,POST,DELETE etc.
There are many examples how to use it like this post here https://stevesnoderedguide.com/node-red-http-request-node-beginners. But don't hesitate to find your own web links.
So once you have the data available via the http request node in the context in Node-RED you can pass this data to an OPC UA client node which in turn sends this data to an OPC UA server. Since OPC UA is TCP/IP based protocol it doesn't matter if the connection goes across eth0 or the optional RTE port cifx0. Both will work.
For a minimum viable product test I recommend to run "Node-RED for windows" first and make simple plausibility pretests of the nodes "http request" and "OPC UA client" on a PC since both just need a LAN interface to run prior any netPI tests. If this works then it will run on netPI also with Node-RED running in a container.
Thx
Armin
RE: REST API server data communication - MGharat - July-21st-2021
Thanks Armin for your guidance, I will try this test .