Raspi OneWire

Raspi OneWire is part of the Raspi.js suite of libraries that provides access to a software emulated 1-wire interface on a Raspberry Pi.

If you have a bug report, feature request, or wish to contribute code, please be sure to check out the Raspi IO Contributing Guide.

System Requirements

• Raspberry Pi Model B Rev 1 or newer (sorry Model A users)
• Raspbian Jessie or newer
  • Node-RED works, but can be finicky and difficult to debug.
  • See https://github.com/nebrius/raspi-io/issues/24 for more info about support for other OSes
• Node 4.0.0 or newer

Detailed instructions for getting a Raspberry Pi ready for NodeBots, including how to install Node.js, can be found in the wiki

Installation

First, be sure that you have installed Raspi.js.

Install with npm:

npm install raspi-onewire

Note: this project is written in TypeScript and includes type definitions in the package.json file. This means that if you want to use it from TypeScript, you don't need to install a separate @types module.

Example Usage

In TypeScript/ES2015+:

import { init } from 'raspi';
import { OneWire } from 'raspi-onewire';

init(() => {
  const bus = new OneWire();
  bus.searchForDevices((err, devices) => {
    bus.readAllAvailable(devices[0], (err, data) => {
      console.log(data);
    });
  });
});

In JavaScript/ES5:

const raspi = require('raspi');
const OneWire = require('raspi-onewire').OneWire;

raspi.init(() => {
  const bus = new OneWire();
  bus.searchForDevices((err, devices) => {
    bus.readAllAvailable(devices[0], (err, data) => {
      console.log(data);
    });
  });
});

API

new OneWire()

Instantiates a new OneWire instance. Note that OneWire only works on pin GPIO4.

Arguments: None

Instance Methods

searchForDevices(cb)

Searches for all devices currently attached to the bus.

Arguments:

Returns: None

read(deviceID, numBytesToRead, cb)

Reads the specified number of bytes from the device specified.

Arguments:

Returns: None

readAllAvailable(deviceID, cb)

Reads all available bytes from the device specified.

Arguments:

Returns: None

License

The MIT License (MIT)

Copyright (c) 2014-2017 Bryan Hughes [email protected]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.