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OIC/IoTivity Base Framework
Sashi Penta
Senior Software Engineer
IoTivity & OIC
Open Source
Open Standard
OIC Architecture
• Discovery and Connectivity
• Interoperability
• Security and Identification
• Different device capabilities
IP CoAP
IoTivity Structure
iotivity/
├── android
├── service
│ ├── notification-manager
│ ├── protocol-plugin
│ │ ├── plugin-manager
│ │ ├── plugins
│ ├── soft-sensor-manager
│ └── things-manager
iotivity/
├── resource
│ ├── csdk
│ │ ├── connectivity
│ │ ├── security
│ │ └── stack
│ │ ├── include
│ │ ├── samples
│ │ │ ├── arduino
│ │ │ └── linux
│ │ ├── src
│ │ └── test
│ ├── src
│ ├── include
│ ├── examples
│ └── unittests
OIC Resource Model
• Server hosts resources – Entity
• Light bulb, Actuator, Sensor
• Plugin – to operate non OIC devices
– Entity Handler
– Resource Attribute • State, Color, Brightness
– Resource Interface
– Resource Type
– Resource Property
OIC Resource Model
• Client can access resources
– Discovery
– RESTful API
• GET/PUT/POST/DELETE
• OBSERVE
• PRESENCE (Active Discovery)
Modes
• SERVER
– Provides resource state information.
– Allows remote control of its resources.
• CLIENT
– Accesses a resource provided by an OIC Server.
• BOTH
– Acts both like both Server and Client.
Proxy Resources / Plugins
IoTivity Server
IoTivity Client
Hue Plugin
Collection
• OCBindResource
Room
Fan Light AC
C Stack API (0.9 Release)
Create Resource
• OCCreateResource
– In
• Resource Type : “core.light”
• Resource Interface : “def”
• Resource URI : “/a/light”
• Entity handler (like callback)
• ResourceProperties: OC_DISCOVERABLE | OC_OBSERVABLE
– Out
• Resource handle
Entity Handler Function that handles the client requests EntityHandler() { if(method == GET) { // Process Get Request & prepare response } else if(method == PUT) { // Process Put Request & prepare response } . . . OCDoResponse(response); }
Discover Resources
• OCDoResource – In
• Method : GET
• Query: – “/oc/core” <- Search on all adapters & Multicast search for IP
– “192.168.1.36:port/oc/core” <- Unicast
• Payload: NULL
• Callback Data:
– Out • handle
DISCOVERY Flow Client App Client Stack Server Stack Server App
OCCreateResource
OCDoResource
Discovery Response
Callback provided in OCDoResource will be called with the
response
GET
“/oc/core”
GET
• OCDoResource
– In
• Method : GET
• Query: “192.168.1.5:29389/a/light”
• Payload: NULL
• Callback Data:
– Out
• handle
GET Flow Client App Client Stack Server Stack Server App
OCCreateResource
OCDoResource
GET Response CallBack
Entity Handler
OCDoResponse
GET
“/a/light”
PUT
• OCDoResource
– In
• Method : PUT
• Query: “192.168.1.5:29389/a/light”
• Payload: {"oc":[{"rep":{“bri":100,"state":true}}]}
• Callback Data:
– Out
• handle
OBSERVE
• OCDoResource
– In
• Method : OBSERVE
• Query: “192.168.1.5:29389/a/light”
• Payload: NULL
• Callback Data:
– Out
• handle
OBSERVE Flow Client App Client Stack Server Stack Server App
OCNotify*Observers
OCDoResource
Observe Response
Callback
OBSERVE “/a/light”
Entity Handler
GET with Obs Flag
PRESENCE
• OCDoResource
– In
• Method : PRESENCE
• Query: “192.168.1.5/oc/presence”
• Payload: NULL
• Callback Data:
– Out
• handle
PRESENCE Flow Client App Client Stack Server Stack Server App
OCCreateResource
OCDoResource
Presence Notification Callback
PRESENCE
“/oc/presence”
OCStartPresence
Presence Notification
Observe Vs Presence
• Observe: – At Resource level
– Server Application decides when to send the observe notification • E.g. Temperature change in the room.
• Presence: – At Device / Server level
– Stack sends the notification (Although application triggers)
– Any kind of resources changes
C++ API
• Richer API
• Object Oriented Design
• JSON Parsing
• Multi threading
OIC Resource Model
• Server hosts resources
– Entity
• Actuator, Sensor
– Entity Handler
• Client accesses the resources
– RESTful API
– GET/PUT/PRESENCE/..
References
• http://openinterconnect.org/
• https://www.iotivity.org/
• http://www.intel.com/content/www/us/en/internet-of-things/overview.html
Thank you
Back up slides
C++ : Flow C++ Client
Stack Client Stack Server Stack C++ Server
Stack
OCCreateResource
OCDoResource
GET Response
Call Back Wrapper
Entity Handler
Wrapper
OCDoResponse
GET
“/a/light”
C++ Server App
C++ Client App
findResource
registerResource
Call Back
Entity Handler
sendResponse
