Draft for readme, addon is not released, npm installation will not work. :)

To install / rebuild run "npm install" in root dir of parport2.

• Wolfgang Hackenberg

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Parport2.JS

Parport2.js is a Node.JS addon you can use to access, control and communicate with parallel ports. It uses kernel macros inb and outb to provide a low-level interface to the parallel port under Linux.

npm install parport2

This addon is an adaption of Xavier Mendez's parport addon (https://npmjs.org/package/parport).

Changes

• Matheus Neder's parallel-port library was replaced by an own implementation providing the same API.
• Built-Scripts were changed to include the new library.

All other parts are unchanged and were written by Xavier Mendez.

License

Parport.js ist released under the GPL, so Parport2.js is distributed under GPLv3 as well.

Usage

var par = require('parport2');

var port = new par.Port(0x2000);

port.writeControl(32); // Set data byte to input
console.log('Data:', port.readData());
port.writeControl(0); // Set data byte to output
port.dataWrite(241);

For low level access to the parallel port, root privileges are necessary.

Control bit 8 (byte value 32) will toggle between input and output mode of data byte.

Compatibility

Important: Only work under Linux!