Wireless PDA Text Messaging

1
Wireless PDA Text Messaging

A Full-Duplex Messaging System
between 2 PDAs
February 9, 2003
Talat Ozyagcilar
Jency Jacob
User Interface
Project Description   The objective of this
project was to equip 2 (two) PDA devices in a way
such that users are able to send and receive
messages between one PDA and another. Hence, the
established connection between the two PDAs is
point-to-point. The list of components that will
be used in this project is as follows 1.     
2 PDA devices 2.      2 Transmitters and 2
Receivers 3.      4 RF antennas for over-the-air
communication. 4.      Level Shifter for
Interfacing RF ICs to the PDA 5.      Two 9V
batteries as power supplies for the transmitters
and receivers
Packet Flow/Control States
FM Transmitter
Overall Project Cost
Overall Flow Diagram
FM Receiver