node-ads1x15's Introduction

node-ads1x15

A library providing access to ADS1015 and ADS1115 I2C analog to digital converters on Raspberry Pi. Basically a javascript port of the python library from Adafruit.

Installation

npm install node-ads1x15 --save

Usage

The following shows how to use the node-ads1x15 module from a Node.js application. (Note that the ads1x15 address and i2c bus are optional arguments.)

var ads1x15 = require('node-ads1x15');  
var chip = 0; //0 for ads1015, 1 for ads1115  

//Simple usage (default ADS address on pi 2b or 3):
var adc = new ads1x15(chip); 

// Optionally i2c address as (chip, address) or (chip, address, i2c_dev)
// So to use  /dev/i2c-0 use the line below instead...:

//    var adc = new ads1x15(chip, 0x48, 'dev/i2c-0');

var channel = 0; //channel 0, 1, 2, or 3...  
var samplesPerSecond = '250'; // see index.js for allowed values for your chip  
var progGainAmp = '4096'; // see index.js for allowed values for your chip  

//somewhere to store our reading   
var reading  = 0;  
if(!adc.busy)  
{  
  adc.readADCSingleEnded(channel, progGainAmp, samplesPerSecond, function(err, data) {   
    if(err)  
    {  
      //logging / troubleshooting code goes here...  
      throw err;  
    }  
    // if you made it here, then the data object contains your reading!  
    reading = data;  
    // any other data processing code goes here...  
  );  
}

Tests

none (yet)

Contributing

contact [email protected] with any bugs.

Release History

1.0.0 Initial release
1.0.1 added adc.busy flag to prevent user from grabbing a reading from a previous request
1.0.3 added i2c_dev parameter for devices that do not use /dev/i2c-1

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