Control the Adafruit/Sparkfun thermal printer from node.js

Largely inspired by http://electronicfields.wordpress.com/2011/09/29/thermal-printer-dot-net/

You can print images, but they need to be 384px wide.

It's a fluent API, so you can chain functions, but don't forget to call print at the end to actually print something!

Crappy schematics

You'll need an USB/Serial converter.

Usage

• install with npm install thermalprinter --save
• check the demo sample:

var SerialPort = require('serialport'),
    serialPort = new SerialPort('/dev/ttyUSB0', {
        baudrate: 19200
    }),
    Printer = require('thermalprinter');

var path = __dirname + '/images/nodebot.png';

serialPort.on('open',function() {
    var printer = new Printer(serialPort);
    printer.on('ready', function() {
        printer
            .indent(10)
            .horizontalLine(16)
            .bold(true)
            .indent(10)
            .printLine('first line')
            .bold(false)
            .inverse(true)
            .big(true)
            .right()
            .printLine('second line')
            .printImage(path)
            .print(function() {
                console.log('done');
                process.exit();
            });
    });
});

Demo