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Implementation a Web-Based Remote Control System for Moving Led Dot- Matrix Display Presented by: BUI, Phuong Nhung, 裴芳绒
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Southern Taiwan University Contents Conclusion Application Design Software System configuration Introduction
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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
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Southern Taiwan University Introduction Appear on: Streets Malls Buildings Parks Other public places Update the information?
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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
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Southern Taiwan University System Configuration
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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
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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.
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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.
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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.
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Southern Taiwan University Design software User-End Software Device-End Software
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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
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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
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Southern Taiwan University Design software Chain of pulse by using Assembly:
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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
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Southern Taiwan University Application
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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.
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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.
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