javax.bluetooth java.obex (optional) Fakulta elektrotechniky a informatiky - Rygol Lukáš

Transcription

1 javax.bluetooth java.obex (optional) Fakulta elektrotechniky a informatiky - Rygol Lukáš

2 The Bluetooth wireless cennectivity technology was originally envisioned in 1994 by the Swedish phone equipment maker Ericsson as a way for mobile devices to communicate with each other at short ranges, up to 10 meters. In 1998, Ericsson, IBM, Intel, Nokia and Toshiba formed the Bluetooth Special Interest Group consortium to develop a roaylty-free, open specification for short-range wireless connectivity. Since then, more then 2000 companies have joined the Bluetooth SIG, including virtually all manufacturers of phone, computer and PDA equipment.

3 Bluetooth-enabled devices are organized in groups called piconets. A piconet consists of a master and up to seven active slaves. A master and a single slave use pointto-point communication; if there are multiple slaves, pointto-multipoint communication is used. A master unit is the device that initiates the communication. A device in one piconet can communicate to another device in another piconet, forming a scatternet. m m/s s s s Bluetooth Network Topology

4 Bluetooth profiles are intended to ensure interoperability among Bluetooth-enabled devices and applications from different manufacturers and vendors. A profile defines the roles and capabilities for specific types of applications. Note well that Bluetooth devices cannot interact unless they conform to a particular profile -- having the bare minimum Bluetooth stack isn't enough. The Generic Access Profile defines connection procedures, device discovery, and link management. It also defines procedures related to use of different security models and common format requirements for parameters accessible on the user interface level. At a minimum all Bluetooth devices must support this profile. The Service Discovery Application and Profile defines the features and procedures for an application in a Bluetooth device to discover services registered in other Bluetooth devices, and retrieves information related to the services. The Serial Port Profile defines the requirements for Bluetooth devices that need to set up connections that emulate serial cables and use the RFCOMM protocol.

5 The Java Bluetooth APIs contain the classes LocalDevice and RemoteDevice, which provide the device-management capabilities defined in the Generic Acces Profile. The LocalDevice class retrives the device s type and the kinds of services it offers. The RemoteDevice class represents a remote device and provides methods to retrive information about the device including its Bluetooth address and name. LocalDevice local = LocalDevice.getLocalDevice(); String address = local.getbluetoothaddress(); String name = local.getfriendlyname(); RemoteDevice remote = RemoteDevice.getRemoteDevice(...) String address = remote.getbluetoothaddress(); String name = remote.getfriendlyname();

6 javax.bluetooth Bluetooth clasess and intefaces required by JSR 82 java.obex OBEX(Object Exchange Protocol) classes and interfaces required by JSR 82

7 DiscoveryListener L2CAPConnection L2CAPConnectionNotifier ServiceRecord

8 DataElement DeviceClass DiscoveryAgent LocalDevice RemoteDevice UUID

9 BluetoothConnectionException BluetoothStateException ServiceRegistrationException

10 OBEX defines several commands, which can processed by OBEX server. Once a client session is established, they are processed by you class extending ServerRequestHandler. CONNECT connection from client SET PATH change current directory PUT send an object from client GET receive an object by client DELETE remove the object on server An authenticator is used to verify client.

11 Authenticator ClientSession HeaderSet Operation SessionNotifier

12 PasswordAuthentication ResponseCodes ServerRequestHandler

13 pt-pkgs/api/bluetooth/jsr082/index.html API_in_Java_ME x html