sensible-opensense-collector

To Build the Collector App

Prerequisites (OSX only):

• xCode 4 or higher

• iOS 7x

• NodeJS

To build, you will need to create a new config.json file in OpenSense Collector/OpenSense Collector. Use these defaults:

{
  "name": "awesome2",
  "version": 2,
  "dataUploadOnWifiOnly": true,
  "baseUrl": "http://localhost:4000/",
  "configUpdatePeriod": 21600,
  "dataArchivePeriod": 300,
  "dataUploadPeriod": 7200,
  "maxDataFileSizeKb": 1024,
  "dataRequests": {
    "battery": [
      {
        "interval": -1
      }
    ],
    "proximity": [
      {
        "interval": -1
      }
    ],
    "positioning": [
      {
        "interval": -1
      }
    ],
    "stepcounter": [
      {
        "interval": -1
      }
    ],
    "motion": [
      {
        "interval": -1,
        "frequency": 1800,
        "duration": 5,
        "updateInterval":0.02
      }
    ],
    "deviceinfo": [
      {
        "interval": -1,
        "frequency":10
      }
    ],
    "activitymanager": [
      {
        "interval": -1,
        "frequency": 15
      }
    ],
  }
}

Commands:

node Server/server.js

open OpenSense\ Collector/OpenSense\ Collector.xcodeproj

Notes on the probes:

Probes are grouped into two categories "OnChange" and "Periodic." "OnChange" probes update only when the state of the device changes. "Periodic" probes update at defined intervals based on their frequency double, as specified in config.json.

OnChange:

• Positioning

• Battery

• Proximity

Periodic:

• DeviceInfo

• Activity

• StepCounter

• Motion

The OSMotionProbe is a special case in that it turns on and remains on for a predefined period (duration). During this period, it takes many data readings, at kMotionUpdateInterval frequency. As with other probes, `frequency determines the length of time between when it starts taking samples.

Think of it as filling up a cup of water. You go frequency seconds between wanting water. When you start filling up your cup, the water flows at updateInterval units per second. After duration, your cup is full, and you stop filling it. In frequency minus duration seconds, you will want water again.

Mathias Hansen - s093478 <s093478@student.dtu.dk>

Al Carter - arcarter@mit.edu