@stoprocent/bluetooth-hci-socket
Version:
Bluetooth HCI socket binding for Node.js
225 lines (179 loc) • 6.99 kB
JavaScript
const BluetoothHciSocket = require('../index');
const bluetoothHciSocket = new BluetoothHciSocket();
bluetoothHciSocket.on('data', function (data) {
console.log('data: ' + data.toString('hex'));
if (data.readUInt8(0) === HCI_EVENT_PKT) {
if (data.readUInt8(1) === EVT_CMD_COMPLETE) {
if (data.readUInt16LE(4) === LE_SET_ADVERTISING_PARAMETERS_CMD) {
if (data.readUInt8(6) === HCI_SUCCESS) {
console.log('LE Advertising Parameters Set');
}
} else if (data.readUInt16LE(4) === LE_SET_ADVERTISING_DATA_CMD) {
if (data.readUInt8(6) === HCI_SUCCESS) {
console.log('LE Advertising Data Set');
}
} else if (data.readUInt16LE(4) === LE_SET_SCAN_RESPONSE_DATA_CMD) {
if (data.readUInt8(6) === HCI_SUCCESS) {
console.log('LE Scan Response Data Set');
}
} else if (data.readUInt16LE(4) === LE_SET_ADVERTISE_ENABLE_CMD) {
if (data.readUInt8(6) === HCI_SUCCESS) {
console.log('LE Advertise Enable Set');
}
}
} else if (data.readUInt8(1) === EVT_DISCONN_COMPLETE) {
const status = data.readUInt8(3);
const handle = data.readUInt16LE(4);
const reason = data.readUInt8(6);
console.log('Disconn Complete');
console.log('\t' + status);
console.log('\t' + handle);
console.log('\t' + reason);
process.exit(0);
} else if (data.readUInt8(1) === EVT_LE_META_EVENT) {
if (data.readUInt8(3) === EVT_LE_CONN_COMPLETE) { // subevent
const status = data.readUInt8(4);
const handle = data.readUInt16LE(5);
const role = data.readUInt8(7);
const peerBdAddrType = data.readUInt8(8);
const peerBdAddr = data.slice(9, 15);
const interval = data.readUInt16LE(15);
const latency = data.readUInt16LE(17);
const supervisionTimeout = data.readUInt16LE(19);
const masterClockAccuracy = data.readUInt8(21);
console.log('LE Connection Complete');
console.log('\t' + status);
console.log('\t' + handle);
console.log('\t' + role);
console.log('\t' + ['PUBLIC', 'RANDOM'][peerBdAddrType]);
console.log('\t' + peerBdAddr.toString('hex').match(/.{1,2}/g).reverse().join(':'));
console.log('\t' + interval * 1.25);
console.log('\t' + latency);
console.log('\t' + supervisionTimeout * 10);
console.log('\t' + masterClockAccuracy);
setAdvertiseEnable(true);
} else if (data.readUInt8(3) === EVT_LE_CONN_UPDATE_COMPLETE) {
const status = data.readUInt8(4);
const handle = data.readUInt16LE(5);
const interval = data.readUInt16LE(7);
const latency = data.readUInt16LE(9);
const supervisionTimeout = data.readUInt16LE(11);
console.log('LE Connection Update Complete');
console.log('\t' + status);
console.log('\t' + handle);
console.log('\t' + interval * 1.25);
console.log('\t' + latency);
console.log('\t' + supervisionTimeout * 10);
}
}
}
});
bluetoothHciSocket.on('error', function (error) {
// TODO: non-BLE adaptor
if (error.message === 'Operation not permitted') {
console.log('state = unauthorized');
} else if (error.message === 'Network is down') {
console.log('state = powered off');
} else {
console.error(error);
}
});
const HCI_COMMAND_PKT = 0x01;
const HCI_ACLDATA_PKT = 0x02;
const HCI_EVENT_PKT = 0x04;
const EVT_DISCONN_COMPLETE = 0x05;
const EVT_CMD_COMPLETE = 0x0e;
const EVT_CMD_STATUS = 0x0f;
const EVT_LE_META_EVENT = 0x3e;
const EVT_LE_CONN_COMPLETE = 0x01;
const EVT_LE_CONN_UPDATE_COMPLETE = 0x03;
const OGF_LE_CTL = 0x08;
const OCF_LE_SET_ADVERTISING_PARAMETERS = 0x0006;
const OCF_LE_SET_ADVERTISING_DATA = 0x0008;
const OCF_LE_SET_SCAN_RESPONSE_DATA = 0x0009;
const OCF_LE_SET_ADVERTISE_ENABLE = 0x000a;
const LE_SET_ADVERTISING_PARAMETERS_CMD = OCF_LE_SET_ADVERTISING_PARAMETERS | OGF_LE_CTL << 10;
const LE_SET_ADVERTISING_DATA_CMD = OCF_LE_SET_ADVERTISING_DATA | OGF_LE_CTL << 10;
const LE_SET_SCAN_RESPONSE_DATA_CMD = OCF_LE_SET_SCAN_RESPONSE_DATA | OGF_LE_CTL << 10;
const LE_SET_ADVERTISE_ENABLE_CMD = OCF_LE_SET_ADVERTISE_ENABLE | OGF_LE_CTL << 10;
const HCI_SUCCESS = 0;
function setFilter () {
const filter = Buffer.alloc(14);
const typeMask = (1 << HCI_EVENT_PKT) | (1 << HCI_ACLDATA_PKT);
const eventMask1 = (1 << EVT_DISCONN_COMPLETE) | (1 << EVT_CMD_COMPLETE) | (1 << EVT_CMD_STATUS);
const eventMask2 = (1 << (EVT_LE_META_EVENT - 32));
const opcode = 0;
filter.writeUInt32LE(typeMask, 0);
filter.writeUInt32LE(eventMask1, 4);
filter.writeUInt32LE(eventMask2, 8);
filter.writeUInt16LE(opcode, 12);
bluetoothHciSocket.setFilter(filter);
}
function setAdvertisingParameter () {
const cmd = Buffer.alloc(19);
// header
cmd.writeUInt8(HCI_COMMAND_PKT, 0);
cmd.writeUInt16LE(LE_SET_ADVERTISING_PARAMETERS_CMD, 1);
// length
cmd.writeUInt8(15, 3);
// data
cmd.writeUInt16LE(0x00a0, 4); // min interval
cmd.writeUInt16LE(0x00a0, 6); // max interval
cmd.writeUInt8(0x00, 8); // adv type
cmd.writeUInt8(0x00, 9); // own addr typ
cmd.writeUInt8(0x00, 10); // direct addr type
(Buffer.from('000000000000', 'hex')).copy(cmd, 11); // direct addr
cmd.writeUInt8(0x07, 17);
cmd.writeUInt8(0x00, 18);
console.log('write: ' + cmd.toString('hex'));
bluetoothHciSocket.write(cmd);
}
function setAdvertisingData (data) {
const cmd = Buffer.alloc(36);
cmd.fill(0);
// header
cmd.writeUInt8(HCI_COMMAND_PKT, 0);
cmd.writeUInt16LE(LE_SET_ADVERTISING_DATA_CMD, 1);
// length
cmd.writeUInt8(32, 3);
// data
cmd.writeUInt8(data.length, 4);
data.copy(cmd, 5);
console.log('write: ' + cmd.toString('hex'));
bluetoothHciSocket.write(cmd);
}
function setScanResponseData (data) {
const cmd = Buffer.alloc(36);
cmd.fill(0);
// header
cmd.writeUInt8(HCI_COMMAND_PKT, 0);
cmd.writeUInt16LE(LE_SET_SCAN_RESPONSE_DATA_CMD, 1);
// length
cmd.writeUInt8(32, 3);
// data
cmd.writeUInt8(data.length, 4);
data.copy(cmd, 5);
console.log('write: ' + cmd.toString('hex'));
bluetoothHciSocket.write(cmd);
}
function setAdvertiseEnable (enabled) {
const cmd = Buffer.alloc(5);
// header
cmd.writeUInt8(HCI_COMMAND_PKT, 0);
cmd.writeUInt16LE(LE_SET_ADVERTISE_ENABLE_CMD, 1);
// length
cmd.writeUInt8(0x01, 3);
// data
cmd.writeUInt8(enabled ? 0x01 : 0x00, 4); // enable: 0 -> disabled, 1 -> enabled
console.log('write: ' + cmd.toString('hex'));
bluetoothHciSocket.write(cmd);
}
bluetoothHciSocket.bindRaw();
setFilter();
bluetoothHciSocket.start();
console.log('isDevUp = ' + bluetoothHciSocket.isDevUp());
setAdvertiseEnable(false);
setAdvertisingParameter();
setScanResponseData(Buffer.from('0909657374696d6f74650e160a182eb8855fb5ddb601000200', 'hex'));
setAdvertisingData(Buffer.from('0201061aff4c000215b9407f30f5f8466eaff925556b57fe6d00010002b6', 'hex'));
setAdvertiseEnable(true);