Wireless Communication System

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Wireless Communication System

• By
• Antonio Fuentes
• Christopher Gonzalez
• Jose Faura
• Jessie Flores

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Hardware
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Problem Statement

1. Establish communication between the robots and
   main computer.

Microcontroller
Computer
Transition
4
Types of Wireless Communication

• Radio Frequency (RF)
• Infrared
• Laser
• Bluetooth
• Wi-fi

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Objective

• Establish and maintain a wireless link between
  the transceiver board and the central
  microprocessor.
• Transmit and recognize position, orientation and
  destination of robot.

Orientation
Current Position
Destination
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Current Wireless Set Up

• Texas Instruments TRF6900 Transreceiver boards
• MSP430 Microprocessor

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Set-up
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The experiment

• Send four different types of characters for the
  microprocessor to flash a determined led.
• This will constitute the basis for the control
  logic of the robot.

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Current Achievements

• A successful RF link has been established between
  the TRF6900 evaluation board and the MSP 430.
• Microprocessor recognizes the data being sent.

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Software
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Protocol

• Serial Port
• Data can be sent asynchronically
• Data consists of packets up to 32 bytes, sent
  8-bits at a time. 2 stop bit is used at a 19200
  Baud rate.
• Testing is done with 1 byte characters.

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How the Robot will recognize the protocol?

• Each robot will be assigned a length of byte to
  read.
• For example Robot 1 will only be allowed to read
  from byte 1 to 6 then Robot 2 will read from byte
  7 to 12.

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Future Protocol

• Advantage
• Quickness
• The information is updated every second.
• The robot could react for any sudden change.
• Efficiency
• Control the five robot at the same time.
• More data could be sent.

• Disadvantage
• Failure
• If the module will suddenly turn off, we will
  loose link to all five robot.

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Global Parameter

• The strategy team will sent all information into
  a Global Parameter, where we then will access and
  send it to each Robot.
• The information we want to access is the Friendly
  Robot Target.
• The information is receive in the normal numeric
  code (ex. 1,2,3 etc.)
• Caution There is a restriction of the amount of
  information we could send through module
  remember 32 byte.

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Global Parameter
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Friendly Target Data

• Access the Global Parameter we had to break down
  into individual, where we could see coordinate
  for each Robot.
• Allow us
• Organize Data
• Convert Data into hexadecimal digit.
• To reduce data space.
• Add a zero in front of every coordinate
• To create a pattern on the Data.

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Converting Data
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The Protocol for the Robot

• Without the zero

• With the zero

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How to send the information to the Robot

• We Initialize the Serial Port of the Computer.
• Setup the setting for the serial port.
• Synchronized the data between the robot and the
  computer.

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Serial Port

• User Interface of the Serial Port VI

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Final Setup
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Future Plan

• Implement specialized software to send and
  receive data.
• Make the communication bidirectional between
  robot and pc.
• Make the robot communicate with its teammates
  through the wireless module.
• Make the MSP430-149 manage all the wireless
  communication with TRF6900, thus reducing space
  and conserving energy.
• Design a board with integration of the MSP430-149
  and the TRF6900.

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Questions

• ?