GingerJim GingerJim - 3 years ago 335
Node.js Question

How to display nodejs raw Buffer data as Hex string

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 Source

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

buff.toString('hex');
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