Implementation a Web-Based Remote Control System for Moving Led Dot- Matrix Display Presented by: BUI, Phuong Nhung, 裴芳绒

Southern Taiwan University Contents Conclusion Application Design Software System configuration Introduction

Southern Taiwan University Introduction Small size Low cost Less power consumption Immune of electrical interferences Limited by distance Verities of functions with poorly labeled buttons

Southern Taiwan University Introduction Appear on: Streets Malls Buildings Parks Other public places Update the information?

Southern Taiwan University Introduction User-friendly interface by using a web page Cost reduction of computer && network services promotes extensive applications on the Internet Web based systems are increased rapidly Drawbacks of using remote controller

Southern Taiwan University System Configuration

Southern Taiwan University System Configuration  PC:  Installed Fedora Core  Connected to the Internet: Ethernet interface  Connected to Drive Circuit: UDP/IP  Installed Apache Web Server and PHP script

Southern Taiwan University System Configuration  Drive circuit: Charon I Development Kit  Atmel AT89C51RD2 microcontroller  Realtek RT8019AS Ethernet controller  Network protocol: ARP, IP, ICMP, UDP, SNMP, DNS and WOL.

Southern Taiwan University System Configuration  Infrared Module:  Simple circuit with IR led  The chains of pulses from drive circuit will drive the IF led emitting the infrared ray control Moving Led Dot-Matrix Display.

Southern Taiwan University System Configuration  Moving Led Dot-Matrix Display  Dimension: 32x120  Provided two functions: Display messages Display date and time  Currently, users can use remote controller to update the message, date and time.

Southern Taiwan University Design software  User-End Software  Device-End Software

Southern Taiwan University Design software  User-End Software  Apache Web Server Open source web server Handle user request.  PHP script  How they cooperate: Request from the user => web server will execute the PHP code to generate a webpage + send new control message through UDP/IP socket to Drive Circuit

Southern Taiwan University Design software  User-End Software  use C to program for Atmel AT89C51RD2  How to replace the IF remote controller Generate chains of pulses Problem: the period time of pulse is very strict!  Can not use C to program  Solve: integrate Assembly program to C program

Southern Taiwan University Design software  Chain of pulse by using Assembly:

Southern Taiwan University Design software  How the Device-End software work?  Use UDP/IP protocol to communicate with User-End program.  Receive the control message + generate the chains of pulses though 1 I/O pin to IF Module

Southern Taiwan University Application

Southern Taiwan University Application  The design has numerous applications:  Advertising agencies: update the bill boards  Public places: Airport, railway stations: information display is a necessity and the ability to update data and to be sure that it is correct is very critical. Hospitals, cinemas, restaurants: it is important to updated events, queue number, latest prices. Highway signboards: especially useful in case the road salutation changes => easy to display detour messages without causing any roadblocks and other congestions.

Southern Taiwan University Conclusion  The user’s interface is quite convenient, via internet web browser from any platform to access the server.  We still need to improve:  Provide more functions.  Make the system accessible though wireless: we will be able to send update message through MSM from a normal cell phone.