mcp3008.js

A node.js module for interfacing the MCP3008 analog/digital converter.

The same instance of the module can control all eight channels on the converter.

Installation

$ npm install mcp3008.js

Usage

Here's a short example:

var Mcp3008 = require('mcp3008.js'),
    adc = new Mcp3008(),
    channel = 0;

adc.read(channel, function (value) {
    doSomethingToValue(value);
});

Interface

Constructor

new Mcp3008([device]);

Device defaults to /dev/spidev0.0.

Reading

instance.read(channel, callback);

This will read the value on channel and send it to callback.

Polling

instance.poll(channel, interval, callback);

This will read the value on channel every interval milliseconds and send it to callback. Use instance.stop(channel) to stop it.

Tear down

instance.close();

This will release the device and stop polling (if any).