snap7-cli-0.1.0 is not a library.
OPC-UA Gateway Demo
Starts a local sensor_server simulator and the snap7-opcua-gateway, then
waits for Ctrl-C. Run the companion opcua_subscriber in another terminal
to see live subscription notifications.
Usage: cargo run --features opcua --bin gateway_demo [-- [PLC_PORT [OPC_PORT]]]
Defaults: PLC on 10200, OPC-UA on 4840.