Thanks for the quick reply.
I am running Node-Red and Ignition Edge on a groov box.
This effort is a proof of concept, so that I can better understand how to apply these technologies. The end goal is an edge appliance that can provide basic on-prem interface, and push data to the cloud for advanced functionality.
I did not use the Ignition node, because I was interested in getting data directly from the OPC server. One use case would have only Ignition OPC server feeding data to the cloud.
Good to know that Edge OPC server won’t accept external connections. This is probably my problem. And a bit disappointing, but I get it.