ts-bacnet/examples/discover-devices.js

The BACnet protocol library written in pure JavaScript.

/**
 * This script will discover all devices in the network and print out their names
 *
 * After 30s the discovery is stopped automatically
 */

const Bacnet = require("../index");

// create instance of Bacnet
const bacnetClient = new Bacnet({ apduTimeout: 10000, interface: "0.0.0.0" });

// emitted on errors
bacnetClient.on("error", (err) => {
  console.error(err);
  bacnetClient.close();
});

// emmitted when Bacnet server listens for incoming UDP packages
bacnetClient.on("listening", () => {
  console.log("discovering devices for 30 seconds ...");
  // discover devices once we are listening
  bacnetClient.whoIs();

  setTimeout(() => {
    bacnetClient.close();
    console.log("closed transport " + Date.now());
  }, 30000);
});

const knownDevices = [];

// emitted when a new device is discovered in the network
bacnetClient.on("iAm", (device) => {
  // address object of discovered device,
  // just use in subsequent calls that are directed to this device
  const address = device.header.sender;

  //discovered device ID
  const deviceId = device.payload.deviceId;
  if (knownDevices.includes(deviceId)) return;

  bacnetClient.readProperty(
    address,
    { type: 8, instance: deviceId },
    Bacnet.enum.PropertyIdentifier.OBJECT_NAME,
    (err, value) => {
      if (err) {
        console.log(
          "Found Device " + deviceId + " on " + JSON.stringify(address)
        );
        console.log(err);
      } else {
        bacnetClient.readProperty(
          address,
          { type: 8, instance: deviceId },
          Bacnet.enum.PropertyIdentifier.OBJECT_NAME,
          (err2, valueVendor) => {
            if (value && value.values && value.values[0].value) {
              console.log(
                "Found Device " +
                  deviceId +
                  " on " +
                  JSON.stringify(address) +
                  ": " +
                  value.values[0].value
              );
            } else {
              console.log(
                "Found Device " + deviceId + " on " + JSON.stringify(address)
              );
              console.log("value: ", JSON.stringify(value));
            }
            if (
              !err2 &&
              valueVendor &&
              valueVendor.values &&
              valueVendor.values[0].value
            ) {
              console.log("Vendor: " + valueVendor.values[0].value);
            }
            console.log();
          }
        );
      }
    }
  );
  knownDevices.push(deviceId);
});