Bluetooth Remote Control This paper appears in: Information and Communication Technologies, ICTTA '06. 2nd On page(s): Location: Damascus Print ISBN: INSPEC Accession Number: Digital Object Identifier: /ICTTA Date of Current Version: 16 åæ 2006Information and Communication Technologies, ICTTA '06. 2nd /ICTTA Professor ： Yih - Ran Sheu Student ： Yao - Wei Tseng Student Id ： MA PTT Production Rate ： 100 ％ 1
Outline Abstract Introduction System Design System Applications a. Controlling PC via Bluetooth enabled Mobile a-1. Server Application a-2. Client Application a-3. Client Application interfaces a-4. Client Application programming b. Controlling electronic devices b-1. Using Java and JNI to control LPT port c. The Electrical circuit Unit Test And Result Conclusion 2
Abstract(1/2) Based on client-server application. The client application runs on mobile phone and the server application runs on PC using J2ME and J2SE respectively. Can be used to control PC’s via mobile phone. 3
Abstract(2/2) It can open the Internet Explorer, Media player, Power Point, MSN messenger and control the mouse. Can be also used to control electrical devices using the parallel (LPT) port of PC. 4
Introduction Bluetooth wireless networks and increased use of handheld devices like mobile phones have encouraged mobile vendors to develop their mobile system and applications. "Bluetooth remote control" application which runs on mobile phones and helps users control their PCs and electrical devices remotely. 5
System Design (1/2) The main system consists of two parts: the client application and the server application. The client application runs on mobile phone and uses J2ME. The server application runs on PC and uses java (JSR-82 standards) and J2SE platform. 6
System Design (2/2) The connection between the client and the server is realized via the Bluetooth technology. Four steps(Initialize stuck 、 discover devices 、 discover services and open connections as shown in figure 1) are necessary to establish a connection between the client and the server. 7
Figure 1 8
System Applications Control the PC from a mobile phone via Bluetooth. Control fans connected to the parallel port of a PC from a mobile phone via Bluetooth. 9
Controlling PC via Bluetooth enabled Mobile Control various applications in PC such as Office 、 IE and mouse. Server program and client program are needed to be installed(The application is a client-server application ). Bluetooth finding a proper device (PC), it asks for permission to control it. The server gives back this permission to the mobile phone and allows the control. 10
Server Application Use RFCOM protocol. The server program waits for the client request. Upon the client request, the server opens a Stream with the client to receive data. The received data is then analyzed in the server to create the appropriate action. 11
Client Application The client program should be installed to the mobile phone. It is a J2ME platform based. Include: device discovery, service discovery, opening connection, and controlling the PC. 12
Client Application interfaces Start interface, search interface, connection interface and main interface(figure 2). The start interface has start application and exit. The second interface is the search interface. The main interface consists of program icons (IE 、 OFFICE).If we press the options button we can either research for devices or add connection. 13
Figure 2 14
Client Application programming Use the J2ME language with the JSR-82 technology which supports the Bluetooth functions. The JSR82 contains two basics libraries: javax.bluetooth. and javax. obex. 15
Controlling electronic devices(1/2) The client program is installed to the mobile; it allows the connection with the PC. The server program is installed to the PC; it allows receiving data from the mobile phone. This data controls the parallel port of the PC where two fans are connected. Pressing certain mobile buttons produces commands to switch the two fans on/off separately or together (see figure 3). 16
Controlling electronic devices(2/2) Sending and receiving data between the mobile phone and the PC via Bluetooth connection. Controlling the parallel port using JAVA language. Designing and implementing a control circuit that allows connecting two fans to the parallel port of the PC. 17
Figure 3 18
Using Java and JNI to control LPT port Writing native Java class to send to the parallel port. Java Native Interface (JNI) which allows writing any program in C++ and loads it into JAVA after saving the program in Dynamic Linkable Library (DLL)as shown in figure 4. 19
Figure 4 使用 JNI 之後， Java 虛擬機器會開放一扇門戶，和 Java 程式可以 突破 Java 虛擬機器的限制，直接呼叫底層作業系統的原生函式庫。 20
The Electrical circuit Unit The electrical circuit controls turning the two fans on/off separately according to LPT outputs. The circuit are the fans and the transistors D313. When a phone button is pressed, the client program, installed in the phone, sends a command to a PC connected to the phone via Bluetooth. The server application, installed in the PC, receives the command, translates it, and sends it to the LPT port. 21
Test And Result - First Application Run the sever application in windows background. Start the client application in the mobile phone. Clicking on the search menu, the phone starts looking for the server. Once the name of the server is found, a new menu appears which allow the user to choose any of the listed programs such as Ms Office, Internet Explorer, and Media Player. The user can even chose the mouse icon so he can use the joystick of the mobile as a mouse of the PC. 22
Test And Result - Second Application When the client application finds the server, new menu appears with the following options: "Pressing number 1" which will turn on the fan-1 "Pressing number 2" will turn on the fan-2. "Pressing number 0" will turn off both fans. "Pressing number 3" will turn on both fans. 23
Conclusion "Bluetooth Remote Control" Making a device able to do things it is not normally asked to do, since the mobile normal job is to receive and make calls, now this mobile can control other devices. Such applications are both easy to use and available for everyone. 24