@stoprocent/bluetooth-hci-socket/examples/mgmt-test.js

Bluetooth HCI socket binding for Node.js

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

const bluetoothHciSocket = new BluetoothHciSocket();

const STATUS_MAPPER = [
  'success',
  'unknown command',
  'not connected',
  'failed',
  'connect failed',
  'auth failed',
  'not paired',
  'no resources',
  'timeout',
  'already connected',
  'busy',
  'rejected',
  'not supported',
  'invalid params',
  'disconnected',
  'not powered',
  'cancelled',
  'invalid index',
  'rfkilled',
  'already paired',
  'permission denied'
];

const MGMT_INDEX_NONE = 0xFFFF;

const MGMT_OP_READ_VERSION = 0x0001;

bluetoothHciSocket.on('data', function (data) {
  console.log('on -> data: ' + data.toString('hex'));

  const index = data.readUInt16LE(2);
  const length = data.readUInt16LE(4);
  const opcode = data.readUInt16LE(6);
  const status = data.readUInt8(8);

  console.log('\tindex = ' + index);
  console.log('\tlength = ' + length);
  console.log('\topcode = ' + opcode);
  console.log('\tstatus = ' + status + ' (' + STATUS_MAPPER[status] + ')');

  data = data.slice(9);

  if (data.length) {
    if (opcode === MGMT_OP_READ_VERSION) {
      const version = data.readUInt8(0);
      const revision = data.readUInt16LE(1);

      console.log('\t\tversion = ' + version);
      console.log('\t\trevision = ' + revision);
    } else {
      console.log('\t\tdata = ' + data.toString('hex'));
    }
  }

  console.log();
});

bluetoothHciSocket.on('error', function (error) {
  console.log('on -> error: ' + error.message);
});

function write (opcode, index, data) {
  let length = 0;

  if (data) {
    length += data.length;
  }

  const pkt = Buffer.alloc(6 + length);

  pkt.writeUInt16LE(opcode, 0);
  pkt.writeUInt16LE(index, 2);
  pkt.writeUInt16LE(length, 4);

  if (length) {
    data.copy(pkt, 6);
  }

  console.log('writing -> ' + pkt.toString('hex'));
  bluetoothHciSocket.write(pkt);
}

function readVersion () {
  write(MGMT_OP_READ_VERSION, MGMT_INDEX_NONE);
}

bluetoothHciSocket.start();
bluetoothHciSocket.bindControl();

readVersion();