1 22 Tizen/Artik IoT Lecture Chapter 8. IoTivity P2P Connection Sungkyunkwan University Embedded Software Lab. @ SKKU Contents 2 22 • IoTivity API Set • Discovery Subsystem – Registering & Discovering a Resource • Querying Resource State – GET – PUT – POST • Resource Observe • SimpLeCLient & SimpLeServer Embedded Software Lab. @ SKKU IoTivity API Set 3 22 • IoTivity supports various API set for platforms and Languages – Tizen, iOS, Android, Ubuntu, OS X, Windows (C/C++, Java, JS etc..) – There are two kinds of API stack : Rich-device and Constrained Devices Embedded Software Lab. @ SKKU Discovery Subsystem 4 22 Embedded Software Lab. @ SKKU Registering and Discovering a Resource (1/3) 5 22 • Resource Registration and Resource Finding are main functionalities in IoTivity Base Layer 1 2 registerResource(…); 3 RPC Call OCCreateResource(); (1). Server: Registering Resource (2). Client : Find Resource in IP Network (multicast) (3). Client : When the client find resource, the callback function is invoked 1 2 3 Embedded Software Lab. @ SKKU Registering and Discovering a Resource (2/3) 6 22 • Registering a resource API <Example> Embedded Software Lab. @ SKKU Registering and Discovering a Resource (3/3) 7 22 • OCPLatform::findResource (const std::string& host const std::string& resourceName OCConnectivityType connectivityType FindCalLback resourceHandLer) Example: simpleClient.cpp ... “/oic/res” = all OIC devices that are discoverable requestURI << OC_RSRVD_WELL_KNOWN_URI; OCPlatform::findResource(“”, requestURI.str(), CT_DEFAULT, &foundResource); ... à API for Service and Resource discovery (client side only) host == null: multicast resource discovery query Embedded Software Lab. @ SKKU Querying Resource State 8 22 • After registering and discovering states, the cLients can invoke GET, PUT query Embedded Software Lab. @ SKKU Querying Resource State: GET (1/2) 9 22 Embedded Software Lab. @ SKKU Querying Resource State: GET (2/2) 10 22 1 Query Response Unmarshaling 2 <Server> Unmarshaling <Client> Embedded Software Lab. @ SKKU Querying Resource State: PUT (1/2) 11 22 Embedded Software Lab. @ SKKU Querying Resource State: PUT (2/2) 12 22 Query unpacking Key:Value Packing Put <Client> Resource Set <Server> Embedded Software Lab. @ SKKU Querying Resource State: POST (1/2) 13 22 • POST can create new resource Like PUT Attribute setting 2 7 Create New Resource 1 Post Invocation 3 <Client> Send Response <Server> Embedded Software Lab. @ SKKU Querying Resource State: POST (2/2) 14 22 Check Resource Created 4 8 5 Attribute Check 9 6 <Client> New Attribute Setting Embedded Software Lab. @ SKKU Resource Observe (1/5) 15 22 • Observe happens at resource LeveL and operates in server/client model Embedded Software Lab. @ SKKU Resource Observe (2/5): Sequence FLow 16 22 Embedded Software Lab. @ SKKU Resource Observe (3/5): Sequence FLow 17 22 Embedded Software Lab. @ SKKU Resource Observe (4/5): SimpLeCLient 18 22 • Observe API 2 1 <Client> Embedded Software Lab. @ SKKU Resource Observe (5/5): SimpLeServer 19 22 • Observe Registration and notify 1 2 Entity Handler check observe message & push observer into observer list CheckObserverList 3 4 Create Light Value changed Watcher Thread Send Notify Embedded Software Lab. @ SKKU SimpleCLient (Android) 20 22 • IoTivity provides SimpleServer and SimpleClient examples for C/C++ and Andorid – SimpleClient and SimpleServer includes restful APIs such as get, put, post and observe Platfrom Config Register Resource Platfrom Config 2 1 Find Resource <SimpleClient> <SimpleServer> Embedded Software Lab. @ SKKU SimpleServer - Android 21 22 Observer List Addition Observing Thread Creation Request Handler HandleEntity Implementation Get Resoponse <SimpleServer> Embedded Software Lab. @ SKKU Android Simple Client & Server Test 22 22 • Using BLuetooth (RFCOMM over BLuetooth) Embedded Software Lab. @ SKKU.