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typescript_test.js
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74 lines (74 loc) · 2.83 KB
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import { AttributeIds, coerceNodeId, OPCUAClient } from "../packages/node-opcua";
const endpointUrl = "opc.tcp://opcuademo.sterfive.com:26543";
async function main0() {
const client = OPCUAClient.create({ applicationName: "MyClientApp" });
// async version
await client.withSession(endpointUrl, async (session) => {
const dataValue = await session.read({
attributeId: AttributeIds.BrowseName,
nodeId: "i=84",
});
console.log(dataValue.toString());
});
}
// main0();
// note compile with tsc typescript_test.ts --lib ES2015
//
// http://thecodebarbarian.com/80-20-guide-to-async-await-in-node.js.html
//
async function main1() {
try {
const client = OPCUAClient.create({ clientName: "DemoClient" });
await client.withSessionAsync(endpointUrl, async (session) => {
const dataValue = await session.read({ nodeId: "ns=1;s=Temperature", attributeId: AttributeIds.BrowseName });
console.log("Temperature = ", dataValue.toString());
});
}
catch (err) {
console.log("Error = ", err);
}
}
async function main3() {
try {
const client = OPCUAClient.create({ clientName: "DemoClient" });
await client.withSessionAsync(endpointUrl, async (session) => {
console.log("sessionId = ", session.sessionId.toString());
const dataValue = await session.read({ nodeId: session.sessionId, attributeId: AttributeIds.Value });
console.log("value = ", dataValue.toString());
});
}
catch (err) {
console.log("Error = ", err);
}
}
main();
async function main2() {
try {
const client = OPCUAClient.create({ clientName: "DemoClient" });
const subscriptionParameters = {
maxNotificationsPerPublish: 10,
priority: 10,
publishingEnabled: true,
requestedLifetimeCount: 1000,
requestedMaxKeepAliveCount: 12,
requestedPublishingInterval: 100,
};
await client.withSubscriptionAsync(endpointUrl, subscriptionParameters, async (session, subscription) => {
const nodeId = coerceNodeId("ns=1;s=Temperature");
const itemToMonitor = { nodeId, attributeId: AttributeIds.Value, indexRange: null };
const requestedParameters = {
samplingInterval: 1000,
queueSize: 10000,
discardOldest: true
};
const monitoredItem = await subscription.monitor(itemToMonitor, requestedParameters);
monitoredItem.on("changed", (dataValue) => console.log("Temperature ", dataValue.value.value));
monitoredItem.on("err", (err) => console.log(err));
await new Promise((resolve) => setTimeout(resolve, 5000));
});
}
catch (err) {
console.log("Main 2", err);
}
}
main2();