How to display nodejs raw Buffer data as Hex string

node.js buffer
GingerJim picture GingerJim · Sep 18, 2013 · Viewed 94.1k times · Source

The following code uses SerialPort module to listen to data from a bluetooth connection.

I am expecting to see a stream of data in Hexadecimal format printed in console. But the console just shows some weird simbols. I want to know how can I decode and display the data in console. 

var serialPort = new SerialPort("/dev/tty.EV3-SerialPort", {
  parser: SP.parsers.raw
}, false); // this is the openImmediately flag [default is true]

serialPort.open(function () {
 console.log('open');
 serialPort.on('data', function(data) {
   var buff = new Buffer(data, 'utf8'); //no sure about this
  console.log('data received: ' + buff.toString());
 });  
});

Answer

Seryh picture Seryh · Jul 1, 2014

This code will show the data buffer as a hex string:

buff.toString('hex');

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