ev3js/battery.js

LEGO Mindstorms EV3 API for Node.js

var fs = require('fs');

var Battery = function() {
    var raw = fs.readFileSync(this.PATH, {encoding: 'utf8'});
    raw.split('\n').forEach(function(row){
        var match = row.match(/POWER_SUPPLY_(.*)=(\d*)(.*)$/);
        if(match){
            this[match[1].toLowerCase()] = match[2] ? +match[2] : match[3];
        }
    }, this);
};

Battery.prototype.PATH = '/sys/class/power_supply/legoev3-battery/uevent';

module.exports = Battery;