wi-fi interface for medical devices academic supervisor- prof.karen reynolds industrial supervisor-...
Post on 13-Jan-2016
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Wi-Fi Interface for medical devices
Academic Supervisor- Prof.Karen ReynoldsIndustrial Supervisor- Mrs Jodie Hobbs
AIM-To send the physiological data wirelessly into the iPhone /iPad / computer with the help of Wi-Fi
FBE built sensors e.g. ECG, temperature
Why using Wi-Fi communication?
Four different ways to send data into iPod /iPad
By using 30 pin dock connector
Headphone jack
Bluetooth
Wi-Fi
Application
Evaluation Board( Serial2 Wi-Fi)
host
Client
Testing of Evaluation Board
Testing of Evaluation Board
My Project
Computer with simple terminal
PROTOTYPE
Block Diagram
+
PIC18F13K22Master
Gain Span GS1011M
(slave)
Battery
FlindersBiomedical
Built sensorsEg-temperature,
ECG
Adhoc
oscillator
ADC
SPI
Specification of Wi-Fi module(GS1011M)
Power- 3.3V (low power)
Processor -2.4GHz
Data Rate- 11,5,2,1Mbps
Standard= 802.11b/g/n
Interface-SPI (master/slave mode), UART ,ADC
Operation mode- Adhoc, infrastructure
Crystal oscillator-44 MHz XTAL
Compatible with any 8/16/32 microcontrollers
Power consumption-
Standby/Deep sleep- 7μA/150μA
Receive @ 11Mb/sec- 140mA
Transmit @11Mb/sec-150mA
Cost- $29.95 (US)
Availability
Continue- Specifications
Specifications of PIC18F13K22
Voltage – (max:5.5V,min:1.8V)
Clock frequency – 64MHz
Interface- SPI, I2C, EUSART
Flash Memory Size- 8KB
Cost- $6.87 (AUD)
At 3.3V , the oscillator can run 64 MHz Frequency between (-40 to 85 degree C)
Current = 15.4mA (Run Supply mode at 64 MHz Internal oscillator)
Setting an Adhoc Network
In an Adhoc network ,the stations are directly connect to each other.
AT+NDHCP=0;AT +NSET=?
Set the IP address of wireless
connection to the same subset mask Set the IBSS,
note the SSID used
AT+WA=IBSS ;AT+NSUDP=10;
Flow chart for Sending Data
Command Processing
ReadCID
Valid?
Read Characters
Transmit Data
Input SensorsSPI
NO
Yes
Esc U
Esc C
SPI – used as communication protocol
start
Set up variables
Configure SPI
Load SSPBUFWith Data to send
Check if SPI transfercomplete
Did the SPI transfer Complete
Read & Clear Data in SSPBUF
Increment counter&
Wait
NO YES
Conclusion
Low power and high- performance wireless data communication system will be designed with the help of low- power transceiver.
Allows medical parameters transmission
Accurate
Easy to use
Timely data to users
Any Questions ?
Thankyou
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