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Node.js module to get basic system information of Raspberry pi/* Raspberry pi toolkit for node.js depends on sync runner library (npm install sync-runner) functions: getThrm(): returns cpu temperature getVcc(): returns total used voltage by soc unit uptime(): system uptime in milliseconds serviceStart(): starts a system daemon, call serviceStop() to do opposite @todo gpio access routines will be implemented soon Armagan Corlu aka PsyChip root@psychip.net 23.03.2016 */ var exec = require('child_process').exec; var execsync = require("sync-runner"); var os = require('os'); var fs = require("fs"); module.exports = { shellc: { temp: "/sys/class/thermal/thermal_zone0/temp", vcc: "vcgencmd measure_volts " }, vcc: ['core', 'sdram_c', 'sdram_i', 'sdram_p'], execute: function (command, callback) { exec(command, function (error, stdout, stderr) { if (typeof callback === 'function') { callback(stdout); } error = null; stdout = null; stderr = null; }); }, getVcc: function () { var res = 0; for (var i = 0; i < this.vcc.length; i++) { res += Math.round(this.util.parseParam(execsync(this.shellc.vcc + this.vcc[i]), "volt").slice(0, -1) * 1000); } return res; }, getThrm: function () { return parseInt(fs.readFileSync(this.shellc.temp, "utf8").toString().trim()) / 1000; }, uptime: function () { return Math.round((os.uptime() * 1000)); }, serviceStart: function (name) { this.execute("service " + name + " start"); }, serviceStop: function (name) { this.execute("service " + name + " stop"); }, util: { explode: function (str, chr, num) { var xx = str.toString(); var pc = xx.split(chr); xx = null; return pc[num]; }, parseParam: function (input, key) { if (input.indexOf("=") <= -1) { return ""; } input += '\n'; var lines = input.split("\n"); for (var i = 0; i < lines.length; i++) { if (this.explode(lines[i], "=", 0).toString().trim() === key) { input = null; key = null; return this.explode(lines[i], "=", 1).toString().trim(); } } } } };
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