如何在 Node.js 中将输出十六进制转换为十进制？

Question

I'm trying to get data from a bluetooth device(heart-rate monitor) where it will show the values of heart rate, pulse rate. when i run the program in terminal the output in comes in hex so any ideas how to display the output in decimal. Thanks..

const bluetooth = require('node-bluetooth');

// create bluetooth device instance

const device = new bluetooth.DeviceINQ();

var num = 0;

device
.on('finished',  console.log.bind(console, 'finished'))
.on('found', function found(address, name){
console.log('Found: ' + address + ' with name ' + name);

device.findSerialPortChannel(address, function(channel){
console.log('Found RFCOMM channel for serial port on %s: ', name,     'channel:',channel);

// // make bluetooth connect to remote device
bluetooth.connect(address, channel, function(err, connection){

console.log('North Vision Patient Monitor')

if(err) return console.error(err);

connection.write(new Buffer([0x55,0xAA,0x00], 'utf-8'), () => {

console.log('Send Data')


connection.write(new Buffer([
  0x0b,
  0x40,
  0x85,
  0xB6,
  0xFB,
  0x10,
  0x3C,
  0xC8,
  0xFF,
  0xB4,
  0x28,
  0x28,
  0x0A,
  0x64,
  0x5A,
  0xB4,
  0x3C,
  0x78,
  0x32,
  0xA0,
  0x32,
  0x6E,
  0x46,
  0xB4,
  0x28,
  0x04,
  0x07,
  0x46,
  0x0A,
  0x0A,
  0x00,
  0x00], 'utf-8'), () => {

    console.log('Receive Data')


    });

});


 connection.on('data', (buffer) => {
 console.log('received message:', buffer,'====',num);
 num++;
 });


});

console.log('finished')

});

 // // make bluetooth connect to remote device
// bluetooth.connect(address, channel, function(err, connection){
// if(err) return console.error(err);

// connection.on('data', (buffer) => {
// console.log('received message:', buffer.toString());
// });

// connection.write(new Buffer('Hello!', 'utf-8'));
// });

}).inquire();

Output:

North Vision Patient Monitor Send Data Receive Data Buffer 1b a1 00 00 00 00 00 00 00 00 00 00 57 55 51 4c 48 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Answer 1

cons bufferInHex = Buffer.from('some string') // init a buffer
console.log(new Uint8Array(bufferInHex)) // display buffer in decimal format