Node.js convert hexadecimal number to byteArray

Question

I want to send a raw buffer using bluetooth connection. The content is a hex number. Currently I split the number manually to an byte array. Is there any function that can help me convert the number to byte array?

//var data = 0x250001000192CD0000002F6D6E742F72;
var data = new Buffer([0x25,0x00,0x01,0x00,0x01,0x92,0xCD,0x00,0x00,0x00,0x2F,0x6D,0x6E,0x74,0x2F,0x72]);
serialPort.write(data);

score 164 · Answer 1 · edited Dec 16 '20 at 12:36

164

In new versions of node (6+) the new Buffer() interface is deprecated. Use:

Buffer.from("250001000192CD0000002F6D6E742F72", "hex")

instead.

Find more info on this using this link below https://nodejs.org/api/buffer.html#buffer_static_method_buffer_from_string_encoding

edited Dec 16 '20 at 12:36

Stephen Ng'etich

628
7
12

answered Dec 10 '16 at 20:45

Brad

5,845
7
30
29

6

Only use this if you don‘t care about any validity-checking on the input; `Buffer.from("abc 123 foo bar baz", "hex")` returns `` – andrewdotn Mar 23 '19 at 13:40
3

Hey Googlers, this is the right answer! C'mon @GingerJim! – jasongonzales Nov 16 '19 at 22:22

score 77 · Answer 2 · answered Sep 18 '13 at 19:09

77

new Buffer("250001000192CD0000002F6D6E742F72", "hex")

answered Sep 18 '13 at 19:09

SLaks

868,454
176
1,908
1,964

6

This usage is deprecated. See other answer for modern API. – Cameron Tacklind Jun 23 '18 at 19:57
`new Buffer()` is deprecated. new usage is `new Buffer.from()` – SefaUn Nov 14 '21 at 20:27

Node.js convert hexadecimal number to byteArray

2 Answers2

Linked