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In the works: Bus pirate bindings for Node.js, letting you control a Bus Pirate from any Node.js script.

The code is fairly untested, and may break your kit. However, these modes have been mostly implemented, and partially tested:

  • UART (Read/Write/Bridge)
  • SPI (Sniff/Write-read)


node-buspirate is in the npm registry!

npm install node-buspirate

Or you could always clone / fork this repo:

git clone
cd node-buspirate && npm install


Check the examples folder for examples of how it can be used.

Basic idea:

#!/usr/bin/env node
var BusPirate = require('./node-buspirate');
var pirate = new BusPirate('/dev/bus_pirate');
pirate.on('connected', function() {
        baudrate: 115200,
        stop_bits: 1,
        data_bits: 8  // ... and other options 
pirate.uart.on('ready', function() {
    setInterval(function() {
        pirate.uart.write('ping UART\r\n');
    }, 3000);
pirate.uart.on('data', function(data) {

The plan is to add other Bus Pirate modes (I2C...) which will be used similarly.


The BusPirate object is an eventEmitter built on top of a node Serialport. It gets the hardware into raw bitbang mode, then just sends and receives raw data from the hardware, and lets other modules handle the specifics of each mode.


  • Write modules to handle other BusPirate modes.
  • Documentation
  • And much more...

Although Javascript is probably not often used for hardware debugging, this project has been an interesting experiment which has proved to be useful. It was started because I don't like Python and the Ruby bus pirate bindings weren't working.