This document summarizes a student project to design a duplex wireless communication system for use in a hospital. It includes sections on the system principles, hardware design using an ET44M210 microcontroller, RF wireless communication subsystem, J2A audio encoding and decoding subsystem, OLED display subsystem, performance analysis, and conclusions. The system allows two-way wireless communication between a nurse and patient for real-time monitoring and uses various components and techniques including microcontrollers, wireless transmission, audio encoding/decoding, and an OLED display.

1. NAME-SABYASACHI SAHOO
BRANCH-ECE-(A)
REDG.NO-1011016310
2/10/2014
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2. CONTENT
 Introduction
 system principle
 Hardware Design
 ET44M210 MCU
 RF Wireless communication sub system
 J2A Audio encoding decoding sub system
 OLED Manifestation Subsystem
 Performance Analysis
 Conclusion
 Reference
 Thank you
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3. INTRODUCTION
 Duplex wireless communication system is the point
to point system, composed 2 communicating party can
communicate with each other in both direction, e.g.mobile .
 The audio frequency technique is the predominant
direction of intelligence calculator research and the key
technique of man-machine communication.
 OLED manifestation technique will have a bright
future because of its special structure, and its
advantage can be seen obviously such as high light rate
and no angle etc.
 Its purpose is to carry out the real-time
communication between nurse and patient.
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4. SYSTEM PRINCIPLE
Fig.1 principle chart of this system
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5. HARDWARE DESIGN
ET44M210 MCU
ET44M210 is a 8-bit micro controller.
o High operation speed, low price and high
performance are its remarkable characters.
o Through 42 I/O ports of the MCU, the
peripheral Sub systems can be connected
and controlled by MCU.
o
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6. CONTINUE...........
RF Wireless Communication Sub system
RF Sub system applies RFW102, which is the
production of RF Waves company. Its a kind of half
duplex working chip. Its working frequency is 2.4 GHz
and transfer speed is 1mbps.
 RFW102 connects host and extension to ensure the
whole system working together perfectly.
 It is the important module of the system.
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7. CONTINUE...............
J2A Audio Encoding and Decoding Sub system
 J2A Audio Encoding and Decoding Sub system makes use of
ET83X432 Module carryout function such as recording,encoding
Decoding, brodcasting.
 It has the ability of encoding and decoding high quality audio
information.
 This chip controlled by MCU supports simplex operation mode
and duplex operation mode.
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8. COUNTINUE............
OLED Manifestation Sub system
 Manifestation Sub system uses Organic Light Emitting Diode
(OLED).
 Its module number is ET52141, which supports 96x96 dots
and 65 Colour.
 Its main function is to display the number of extension, then
nurse can fix easily which extension is calling by vision.
According to the data transferred by RF wireless module, the
system host controls OLED.
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9. PERFORMANCE ANALYSIS
 This system has good dependability.
 It avoids the disadvantages of wired
system such as troublesome routing, low
utilization rate and so on.
 The wireless medium isn't protected by
environment like wire medium, so it may
be interrupted or decayed. We should use
proper methods to settle these problems
according to the actual application.
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10. CONCLUSION
Finally ,I conclude that a duplex communication system that suits
for the low level market. It not only can be applied in the hospital
sickroom, but also can be used in some small working places. To sum
up, this system has high practicability and plasticity. This system
makes use of wireless communication technique, J2A audio Encoding
and Decoding duplex communication technique OLED manifestation
technique and FLASH memory technique. This system's small
structure, simple communication protocol and convenient application
are all its advantages.
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11. REFERENCES: Zhu Renlong, Zhao Junyi, Huang Yong.” ET44M210 SoC
micro controller based on IP design”. Journal of Singlechip
and Embedded System Application, 2004.6, pp: 50-52
 Shen Huaiyang, Song Jianbo, Wang Shijie.” First
Exploration of Voice Technology Applied to Intelligent
Instrument”. New Technique and New Instrument. Vol 21, No
4, 2004, pp: 21-25
 Liu Mingfang, Xiang Xuejun. “Design and Application of RF
Front End Using RFW102 Chipset”, Journal of China Three
Gorges Univ. (Natural Sciences), Vol 27-No 5,2005.10, pp:
434-436
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12. THANK YOU
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