II LITERATURE REVIEW
2.1 Background
5 2.2
Mailing system, Sensor, GSM modem and interface module; Concept, Overview of Concept, Element and
Specification 5
2.2.1 Mailing System 5
2.2.2 Control of the mail alert system 6
2.2.3 Element of AMDETSYS concept 7
2.2.3.1 PIC microcontroller for main circuit 7
2.2.3.2 Communnication Interface 17
2.2.3.3 GSM modem 22
2.2.3.4 Sensor 27
III METHODOLOGY
3.1 Introduction
32 3.2
Flow Chart of methodology 33
3.3 Project Plan Overview
34 3.4
Functional Block Diagram of AMDETSYS 35
3.5 Connection of AMDETSYS
36 3.6
Hardware Design and Development 37
3.7 Microcontrollers
37 3.7.1
Pin Diagram of PIC16F877A 38
3.7.2 Port Assignment
39 3.7.3 Basic Circuit for a Microcontroller
39 3.8
Printed Circuit Board PCB 41
3.8.1 PCB Design Rule and Consideration 41
3.9 Software Development
42 3.9.1
C Language 43
3.9.2 PIC Programmer 43
3.9.2.1 Programming a PIC 45
3.10 Testing
45
3.11 Expected Result
46 3.12
Gantt Chart of Project Planning 47
IV RESULT AND ANALYSIS
4.1 Introduction
48 4.2
Project Result 49
4.2.1 How the System Works
49 4.2.2
Software Analysis 51
4.2.2.1 Programming Procedure 51
4.2.3 Hardware Analysis
60 4.2.3.1 Medium range IR detector
60 4.2.3.2 Control unit
66 4.2.3.3 GSM Modem
72 4.2.3.4 Voltage regulator
73 4.2.4
Testing on breadboard 75
4.2.5 Design of the mailbox
75 4.2.6 Finish product of the prototype
76
V DISCUSSION AND CONCLUSION
5.1 Introduction
77 5.2
Discussion 77
5.3 Conclusion
78 5.4
Future Recommendations 80
REFERENCES 81
APPENDICES 82
LIST OF TABLES
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PAGE
2.1 Main features of a chip
9 2.2
PIC 16F87XA Device Features 15
2.3 Three-State Control of Receivers
20 2.4
Pin Definitions 30
3.1 Port Assignment
39 3.2
Common Design Rules of PCB Layout Design 42
4.1 IR specification
63
LIST OF FIGURES
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PAGE
2.1 Centralize mailbox system
6 2.2
PIC 16F877A microcontroller 7
2.3 Peripherals PIC 16F877A
14 2.4
Pic16F874A877A Block Diagram 16
2.5 MAX220MAX232MAX232A Pin Configuration and
Typical Operating Circuit 17
2.6 MAX232 Communication Interface
21 2.7
Typical organization of network elements in a GSM network Supporting SMS
23 2.8
WAVECOM Fastrack GSM Modem 26
2.9 Medium Range Infrared Sensor
29 2.10
PCB layout of the transmitter and receiver circuit IR sensor 31
3.1 Frame work of PSM
34 3.2
The AMDETSYS block diagram 35
3.3 Basic connection of AMDETSYS
36 3.4
Pin Diagram of Microcontroller PIC16F877A 38
3.5 Basic Circuit for a Microcontroller
40 3.6
PIC Programmer Circuit 44
3.7 IC-Prog Software
44 4.1
Full functional block diagram of AMDETSYS 50
4.2 Medium range IR detector
61 4.3
Schematic Circuit of IR 61
4.4 PCB Layout of IR Circuit
61 4.5
IR sensor place inside the mailbox 62
4.6 Signal detection overview
64 4.7
Signal detection using oscilloscope 64
4.8 Reflection of the sensor
65 4.9
PIC16F877A main circuit 66
4.10 Schematic Circuit of PIC Main Circuit
66 4.11
PCB Layout of PIC Main Circuit 66
4.12 Interface circuit using MAX 232
67 4.13
Schematic Circuit of Interface Circuit 68
4.14 PCB layout of Interface Circuit
68 4.15
Connection using RS232 cable 70
4.16 GSM Modem
72 4.17
GSM Modem connection with control unit 73
4.18 Voltage regulator
74 4.19
Schematic circuit of Voltage Regulator Circuit 74
4.20 PCB layout of voltage regulator Circuit
74 4.21
Testing on breadboard 75
4.22 Mail compartment and control unit casing
75 4.23
Finish product of the prototype 76
LIST OF ABBREVIATIONS
CI - Communication Interface
CM - Conventional method
GSM - Global System for Mobile Communication Modem LCD
- Liquid Crystal Display LED
- Light Emitting Diode PIC
- Programmable Interface Controller SMS - Short Message System
AMDETSYS - Automatic Mail Detector Via SMS IR
- Infra Red SMS - Short Message System
APPENDICES
NO TITLE
PAGE A
PIC16F87XA Data Sheet 82
B +5V-Powered, Multichannel RS-232 DriversReceivers
98
CHAPTER I
INTRODUCTION
1.1 Background
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