text: #!/usr/bin/env node
  
  /*
   * Author: Brendan Le Foll <brendan.le.foll@intel.com>
   * Copyright (c) 2014 Intel Corporation.
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  "use strict";
  
  const mraa = require('mraa'); //require mraa
  
  let i2cDevice = new mraa.I2c(0);
  i2cDevice.address(0x77);
  
  // initialise device
  if (i2cDevice.readReg(0xd0) != 0x55) {
      console.log("error");
  }
  
  // we want to read temperature so write 0x2e into control reg
  i2cDevice.writeReg(0xf4, 0x2e);
  
  // read a 16bit reg, obviously it's uncalibrated so mostly a useless value :)
  console.log(i2cDevice.readWordReg(0xf6));
  
  // and we can do the same thing with the read()/write() calls if we wished
  // thought I'd really not recommend it!
  let buf = new Buffer(2);
  buf[0] = 0xf4;
  buf[1] = 0x2e;
  console.log(buf.toString('hex'));
  i2cDevice.write(buf);
  
  i2cDevice.writeByte(0xf6);
  let result = i2cDevice.read(2);
  console.log(result.toString('hex'));
  