beaglebone temperature/humidity monitor with metrano

dht22.js

var exec = require('child_process').exec
var Metrano = require('metrano)

var metrano = new Metrano('http://ice:3000/')

///home/nherment/Adafruit_Python_DHT/examples/AdafruitDHT.py 22 P8_11

exec('/home/nherment/Adafruit_Python_DHT/examples/AdafruitDHT.py 22 P8_11', function(err, stdout, stderr) {
  if(err) {
    console.log(err);
  }
  if(stderr) {
    console.error(stderr)
  }
  if(stdout) {
    console.log('>', JSON.stringify(stdout));
    var match = /^Temp=(\d*\.?\d*)\*C\s+Humidity=(\d*\.?\d*)\%$/m.exec(stdout)
    try {
      var temperature = parseFloat(match[1]);
      var humidity = parseFloat(match[2]);
      console.log('h:', humidity, 't:', temperature);
      metrano.save('temperature', 'beaglebone', temperature, Date.now(), function(err) {
        if(err) {
          console.log(err)
        } else {
          console.log('.');
        }
      })
      metrano.save('humidity', 'beaglebone', humidity, Date.now(), function(err) {
        if(err) {
          console.log(err)
        } else {
          console.log('.');
        }
      })
    } catch(err) {
      console.log(err);
    }
  }
})