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Gateway application to connect Samsung SmartThings to Watson IoT
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README.md

IoT Gateway Application for Samsung SmartThings

Connect your Samsung SmartThings to Watson IoT

Setup

  • Log in to your account on SmartThings/dev
  • Create a new SmartApp
  • Click From Code and paste in the content of watsoniot.groovy from this repository
  • Click Create
  • Click Save
  • Click Publish

Configuration

Using the SmartThings mobile application navigate to Marketplace > SmartApps > My Apps, here you will find the application IBM Watson IoT Bridge that we created previously.

Configure Target Organization

You will need to have generated an API key from your Watson IoT dashboard (or have been provided one by whoever oversees the Watson IoT organization you wish to connect to).

The API key requires the following permissions:

  • Create Devices
  • Update Devices
  • View Devices
  • Publish/send an event

Of the default roles, both Standard Application and Backend Trusted Application are suitable for use with this application, providing the abilty to register devices and submit events on behalf of devices.

SmartApp Configuration 1

Configure Device Access

You also need to explicitly grant access to each individual device capability that you want to Watson IoT to work with SmartApp Configuration 2

Verification

After the setup is complete you should be able to see the application listed when you navigate to My Home > SmartApps

SmartApp

Metadata and Device Registration

  • Devices are automatically registered in Watson IoT
    • All SmartThings are created with a typeId of smartthings
    • The unique identifier of each device is used as the deviceId
    • The class of SmartThing is recorded in deviceInfo.deviceClass (e.g. "Motion Sensor", "Multipurpose Sensor")
  • Device metadata is synced to Watson IoT:
    • The custom label you applied to each device is recorded in deviceInfo.description
    • The name of your location is recorded in deviceInfo.descriptiveLocation (e.g. "My Home")
    • The version of the bridge is recorded in metadata.smartthings.bridge.version
    • The capabilities of each device are recorded as an array in metadata.smartthings.capabilities
    • The longitude and latitude for the center of your geofence is recorded in each device's location record
    • Device metadata updates occur when the application is installed or reconfigured

Sample

  {
    "clientId": "d:abc123:smartthings:a0c9872a-afad-49e4-8201-3adf98a09c5e",
    "typeId": "smartthings",
    "deviceId": "a0c9872a-afad-49e4-8201-3adf98a09c5e",
    "deviceInfo": {
      "deviceClass": "Water Leak Sensor",
      "description": "Bathroom Window",
      "descriptiveLocation": "Home"
    },
    "metadata": {
      "smartthings": {
        "bridge": {
          "version": "0.2.0"
        },
        "capabilities": [
          "temperature",
          "battery"
        ]
      }
    }
  }

IBM Watson IoT Dashboard

Events

  • Device events are streamed in real time into Watson IoT

State updates are published to Watson IoT in real time. The events sent by any device are defined by it's capabilities. Watson IoT eventId's match 1:1 with SmartThings capabilities, all events are sent in JSON format.

SmartThings often represents boolean (true or false) states as a string (e.g. on|off, active|inactive). The Watson IoT bridge converts these into simple boolean values to ease analytics and rule generation:

  • SmartThings acceleration state: active is converted to an acceleration event with value of true
  • SmartThings contact state: closed is converted to a contact event with value of true
  • SmartThings motion state: active is converted to a motion event with value of true
  • SmartThings presence state: present is converted to a presence event with value of true
  • SmartThings switch state: on is converted to a switch event with value of true
  • SmartThings water state: wet is converted to a water event with value of true

If a SmartThings device has multiple capabilities it will emit multiple events into Watson IoT. For example, a multipurpose sensor will emit up to four different events based on the level of access granted to the bridge application: acceleration, battery, contact & temperature

Acceleration Sensor Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "acceleration": true
}

Battery Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "battery": 0.83
}

Contact Sensor Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "contact": true
}

Motion Sensor Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "motion": true
}

Power Meter Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "power": 3.0
}

Presence Sensor Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "presence": true
}

Switch Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "switch": true
}

Temperature Measurement Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "temperature": 15
}

Three Axis Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "x": 1,
  "y": 50,
  "z": 62
}

Water Leak Event

{
  "timestamp": 	"2016-02-03T14:56:13+00:00", 
  "water": true
}

Command Control

The bridge only works one way right now, commands can not be sent to SmartThings through the Watson IoT Bridge yet

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