如何在不知道端口的情况下通过node.js连接到"In-Sight OPC Server“？

Question

这就是我想要创造的，这对我来说是全新的。我希望有人能帮助我。

//this is the part I cannot figure out, maby anyone knows a tool how to find this port
const endpointUrl = "opc.tcp://145.49.49.3:???";

const opcua = require("node-opcua");
const AttributeIds = opcua.AttributeIds;
const OPCUAClient = opcua.OPCUAClient;

(async function main(){

    const client = new OPCUAClient({});
    await client.connect(endpointUrl);
    const session = await client.createSession({userName: "admin", password: ""});

    const dataValue = await session.read({nodeId: "ns=1;s=AcquisitionCount",attributeId: AttributeIds.Value});
    console.log(`Count is ${dataValue.value.value.toPrecision(3)}°C.`);

    await client.closeSession(session,true);
    await client.disconnect();

})();

Answer 1

默认端口是4840，但您必须以某种方式来确定它。

通常，您要连接的服务器会包含完整的端点URL、端口、文档或在某个配置中列出。