IoT2020 as opc-server - How can access the variable?

Hi,

[snip]

2) Once the opc ua package is running I would like to use the iot2020 as a opc-server. On the iot a arduino program is running and the server should provide one of the variables from this program. How can I access the variable?

Thanks for your help in advance!

Andreas

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Split from OPC UA Client with node-red.