Wi-Fi Interface for medical devices Academic Supervisor- Prof.Karen Reynolds Industrial 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

My Project Computer with simple terminal PROTOTYPE

Block Diagram + PIC18F13K22 Master Gain Span GS1011M (slave) Battery Flinders Biomedical Built sensors Eg-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= b/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  11Mb/sec- 140mA   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 Read CID Valid? Read Characters Transmit Data Input Sensors SPI NO Yes Esc U Esc C

SPI – used as communication protocol start Set up variables Configure SPI Load SSPBUF With Data to send Check if SPI transfer complete Did the SPI transfer Complete Read & Clear Data in SSPBUF Increment counter & Wait NOYES

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