@mkerix/noble/examples/advertisement-discovery.js

A Node.js BLE (Bluetooth Low Energy) central library.

const noble = require('../index');

noble.on('stateChange', function (state) {
  if (state === 'poweredOn') {
    noble.startScanning();
  } else {
    noble.stopScanning();
  }
});

noble.on('discover', function (peripheral) {
  console.log(`peripheral discovered (${peripheral.id} with address <${peripheral.address}, ${peripheral.addressType}>, connectable ${peripheral.connectable}, RSSI ${peripheral.rssi}:`);
  console.log('\thello my local name is:');
  console.log(`\t\t${peripheral.advertisement.localName}`);
  console.log('\tcan I interest you in any of the following advertised services:');
  console.log(`\t\t${JSON.stringify(peripheral.advertisement.serviceUuids)}`);

  const serviceData = peripheral.advertisement.serviceData;
  if (serviceData && serviceData.length) {
    console.log('\there is my service data:');
    for (const i in serviceData) {
      console.log(`\t\t${JSON.stringify(serviceData[i].uuid)}: ${JSON.stringify(serviceData[i].data.toString('hex'))}`);
    }
  }
  if (peripheral.advertisement.manufacturerData) {
    console.log('\there is my manufacturer data:');
    console.log(`\t\t${JSON.stringify(peripheral.advertisement.manufacturerData.toString('hex'))}`);
  }
  if (peripheral.advertisement.txPowerLevel !== undefined) {
    console.log('\tmy TX power level is:');
    console.log(`\t\t${peripheral.advertisement.txPowerLevel}`);
  }

  console.log();
});