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Integrating Bluetooth onto LEGO Robots
Andrew Jones
Mike Krofcheck
Project PurposeProject Solution and GoalsDesign GoalsResults and ConclusionsAcknowledgments Q & A
Agenda
Problem to be solved
• EECS 375 robot designs repeated often
• Limitations with wired communication– Difficult to download code– Robots don’t “talk”– Limited teamwork during
competition
Project Solution & Goals
• Design integrated Bluetooth communication board for use with serial devices
• Develop Bluetooth driver software for use with microcontroller
• Integrate communication board with EECS 375 robots
Acquire parts for projectDesign high frequency RF antennaDesign/Fabricate PCB for moduleTest and verify operation PCBIntegrate PCB with host computerIntegrate PCB with host microcontroller
Design Steps
Design Steps
Acquire BTM
PCB/Antenna design
Micro. development
Verify PCB IntegrateAndrew/Mike
Mike
Andrew
Andrew/Mike Andrew/Mike
Acquiring Bluetooth
Found module for purchase in U.K.Windigo Systems BCM02C2XX-RAll-in-one solution
68HC12 micro. development kit Acquired from “Frank”Feature set
Integrated Inverted-F Antenna (IIFA)
Compact sizeIntegrated on to PCB
Redundancy in antenna design
Antenna Design
High frequency concernsDecoupling capacitorsComponent placementAntenna & ground plane
Test points
PCB Design
PCB Verification
Visual inspectionTrace continuityInitial RF output detectionInterface w/ host via RS232
RS232-to-UART converterVoltage conversion processUse of Max232
Signal connection scheme
BTM Integration
BTM Integration
BTM <> HC
2 <--> 3
3 <--> 2
7 <--> 8
8 <--> 7
N/A GND<-- 5
BTM Integration
ConversionTxD RxD
Generic BT communication board created that could interface with serial devicesBT developer support limitedGreat deal learned during projectFuture work on project ...
Results & Conclusions
Frank MeratBob LeskovecRob BarrisQuinton S.Q. Yuan
Acknowledgments
Q & A