take_picture.js

var RaspiCam = require("raspicam");

var moment = require('moment');
var timestring = moment().format('YYYY-MM-DD HH.MM.SS');

var camera = new RaspiCam({
	mode: 'photo',
	output: timestring+'.jpg'
});

//to take a snapshot, start a timelapse or video recording
camera.start( );

camera.on("started", function(){ 
    console.log('started');
});

//listen for the "read" event triggered when each new photo/video is saved
camera.on("read", function(err, filename){ 
    console.log('err:' + err);
    console.log('filename:' + filename);
});

//listen for the process to exit when the timeout has been reached
camera.on("exited", function(){
    console.log('exited');
});