Example 2 that can be added

[mebarton]

// To run this do the following
//
// install modules
// npm install node-ads1x15 --save
//
//
// nodejs i2c.js
//
// Code test on a Pi3 and a AUTOMATION PHAT unit
// https://shop.pimoroni.com/products/automation-phat

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-1');

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

var ChData =[]; //somewhere to store our reading
var dev = 127; // used to change Ch data to Voltage

// Reading the ch data
var ReadCh = function(ch, callback){
adc.readADCSingleEnded(ch, 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!
ChData[ch] = data // Putting data into

//console.log ('channel  ' + ch + ': ' + data);
// Calling the next ch or done
callback();

});
}

// A way to make the reads run one after the other with callbacks
var Readchall = function(){ReadCh(0, Readch1)};
var Readch1 = function(){ReadCh(1, Readch2)};
var Readch2 = function(){ReadCh(2, Readch3)};
var Readch3 = function(){ReadCh(3, ChDone)};
var ChDone = function(){
// This is run after the 4 ch have been read
console.log ('CH1: ' + (ChData[0]/dev).toFixed(2) +
'\tCH2: ' + (ChData[1]/dev).toFixed(2) +
'\tCH3: ' + (ChData[2]/dev).toFixed(2) +
'\tCH4: ' + (ChData[3]/dev).toFixed(2) );
};

if(!adc.busy)
{

// Readchall(); // - one Time Read read all 4 ch

// OUTPUT
// CH1: 0.03 CH2: 0.03 CH3: 0.03 CH4: 4.60

iv = setInterval(Readchall, 500); // Repeat every 500msec
// 100 (every 100msecs or 10 times a sec) is the max with this program
// will do with 4 ch being run each time and the Sample rate (On a pi3).

// OUTPUT
// CH1: 5.15 CH2: 0.03 CH3: 0.03 CH4: 4.60
// CH1: 5.15 CH2: 0.03 CH3: 0.03 CH4: 4.60
// CH1: 0.03 CH2: 0.03 CH3: 0.03 CH4: 4.60
// CH1: 0.03 CH2: 0.03 CH3: 0.03 CH4: 4.60

}