WMG aka Wearable Medical Gaurdian by Milan Kkharel. Cortex-M3 Processor - ARM is main heart of the device Perefirals used: BMP_180 Temperature and Pressure sensor Adafruit EZ-link BT module Amped Pulse Sensor 4-Digit 7 segment display Buzzer , Pull-Up push button

1. include "mbed.h"
2. include "BMP180.h"
3. include "PulseSensor.h"
4. include "DigitDisplay.h"
5. include "beep.h"
6. include <string>
7. include <sstream>
8. include <iomanip>
9. include <iostream>

1. define PIN_SDA p9 BPM_180 DataAvailable
2. define PIN_SCL p10 clock for BPM180

fadeout effect constants macros

1. define PWM_STEPS 35
2. define PWM_SPEED 50
3. define LED_ON 1
4. define LED_OFF 0

pins Beep buzzer (p21); DigitDisplay display(p27, p28); Serial pc(USBTX, USBRX); Serial bt(p13,p14); InterruptIn pb(p8); DigitalOut led1 (LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); DigitalOut led4(LED4);

global variables and pointers PulseSensor* pSensor; int bpm = 0; current reading for bpm bool received = false; bool set = false; float temperature; int minimum,maximum,counter; string temp,pres,puls,sent,bpm_Min, bpm_Max, city; string SOS; push button ostringstream stream_t,stream_bpm, stream_p; float to string vars int heat_freq=30, bpm_freq=130; converted values from the string const unsigned char msg_set[] = { 0x00, 0x00, 0x00, 0x06d, 0x79, 0x78,0x3e, 0x73, 0x00, 0x00,0x00}; const unsigned char msg_act[] = { 0x77, 0x39, 0x78, 0x30, 0x1e, 0x79, 0x00, 0x00, 0x00 }; const unsigned char msg_wait[] = { 0x00, 0x01,0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x3f, 0x40, 0xff, 0x00 }; int active = 0, flag_heat=0, flag_bpm = 0; triggers int city_index =8; North bay by default int temps[] = { 24,25,26,26,27,28,32,34,30,26,27,28,28 };

===================FUNCTIONs====================== void heat_alert (void) { wait(0.5); if(temperature > temps[city_index]*0.1) { buzzer.beep (heat_freq, 0.25); flag_heat = 1; } wait(0.5); }

void blink_led(int from, int to) { for (int i = 0; i < PWM_STEPS; i++) { led1 = from; led2=from; led3=from; led4=from; wait_us(i * PWM_SPEED);

led1 = to; led2 = to; led3 = to; led4 = to; wait_us((PWM_STEPS - i) * PWM_SPEED); } } void sos(void) { if ((flag_heat == 1) and (heat_freq>0)){ heat_freq=0; } else if((flag_bpm == 1)and(bpm_freq>0)){ bpm_freq=0; } else SOS="1"; } void sendDataToProcessing(char symbol, int data) { regestiring and collecting data in real-time if(symbol == 'B') { bpm = data; pc.printf("%c %d\r\n", symbol, data); pc.printf("bpm = %d \r\n S= %6.3f \r\n Q= %6.3f \r\n", bpm , S ,Q );

4 leds on the beep blink_led(LED_OFF, LED_ON); blink_led(LED_ON, LED_OFF); } BT <= while(bt.readable()) { received = true; sent += bt.getc(); } if(sent.length() == 2 ) { heat_freq = atoi(sent.c_str()); if(heat_freq == 10) heat_freq=0; buzzer.beep(heat_freq,0.5); sent.assign(""); pc.printf("heat");

} if(sent.length() == 3) { bpm_freq = atoi(sent.c_str()); buzzer.beep(bpm_freq,0.5); sent.assign(""); pc.printf("bpm"); } }

int main() { pb.mode(PullUp); pb.rise(&sos); pSensor = new PulseSensor(p20, sendDataToProcessing , 20); pSensor->start(); global pointer is used

BMP180 bmp180(PIN_SDA, PIN_SCL); float pressure; float temperature; bmp180.Initialize(32, BMP180_OSS_ULTRA_LOW_POWER); 64m altitude compensation and low power oversampling display.setBrightness(2);

while(1) { if (bmp180.ReadData(&temperature, &pressure)) if(temperature>30 && temperature <35) { pc.printf("Temp %6.2f \r\n", temperature); } pc.printf("temp : %6.2f",temperature); pc.printf("printin %d",bt.getc()); bt.printf("Pressure(hPa): %6.2f \t Temperature(C): %6.2f \t Pulse(BPM): %d \r\n", pressure, temperature, bpm);,S,Q); bt.printf("Pressure(hPa): %6.2f \t Temperature(C): %6.2f \t Pulse(BPM): %d \r\n", pressure, temperature, bpm);,S,Q); pc.printf("bpm = %d \r\n S= %6.3f \r\n Q= %6.3f \r\n", bpm , S ,Q );

if(bpm>100) bt.printf("xx");

if(bpm<=100) bt.printf("ok");

if ( !checked && received ) { checked = true; } pc.printf("length of temp %d value %s / is at %d \n\r", temp.length(), temp.c_str(),comma);

pc.printf("min %s and max is %s \r\n",restMin.c_str(),restMax.c_str());

Check recieved data if(sent.length() == 1) { printf("mode %s \r\n",sent.c_str()); active = atoi(sent.c_str()); sent.assign("");

}

if(sent.length() > 6) { size_t comma = sent.find(","); size_t dot = sent.find("."); city.assign(sent.begin(),comma); bpm_Min.assign(sent.begin()+comma+1,sent.begin()+dot); bpm_Max.assign(sent.begin()+dot+1,sent.end()); minimum = atoi(bpm_Min.c_str()); maximum = atoi(bpm_Max.c_str()); city_index = atoi(city.c_str()); sent.assign(""); pc.printf("recieved: min %s and max is %s city index = %s\r\n",bpm_Min.c_str(),bpm_Max.c_str(),city.c_str()); }

IF SET ! if(minimum> 0) { when resting if(active == 0) { counter++; if (counter < 12) { display.writeRaw(0,msg_wait[counter]); display.writeRaw(1,msg_wait[counter]); display.writeRaw(2,msg_wait[counter]); display.writeRaw(3,msg_wait[counter]); heat_alert(); } reached the count, monitoring mode else { displaing on 4digit 7 seg if (bpm<100) { display.write(0,0xff); display.write(1,0xc0); display.write(2,bpm / 10); display.write(3,bpm % 10); } if(bpm>=100) { display.write(0,0xc0); display.write(1,bpm/100); display.write(2,(bpm/10)%10); display.write(3,bpm % 10); }

if( ((0.85*minimum) > bpm) || ((1.15*maximum) < bpm)) { buzzer.beep(bpm_freq,0.25); flag_bpm = 1; } heat_alert(); } } Is active else if ( active == 1) { counter =0; set=true; display.writeRaw(0,msg_act[0]); display.writeRaw(1,msg_act[1]); display.writeRaw(2,msg_act[2]); display.writeRaw(3,msg_act[3]);

heat_alert(); } HEAT ALERT

}/*end of received*/

Please set-up message if BPM is not received else{ for (int at=0; at < 8; at++) { display.writeRaw(0,msg_set[at]); display.writeRaw(1,msg_set[at+1]); display.writeRaw(2,msg_set[at+2]); display.writeRaw(3,msg_set[at+3]); wait_ms(140); } total wait time is 1040 ms } stream_t << fixed << setprecision(1) << temperature; temp = stream_t.str();

stream_bpm << fixed << setprecision(2) << bpm; puls = stream_bpm.str(); if (puls.length() == 2 ) puls.insert(0,"0"); if(puls.length() == 1) puls.insert(0,"00");

stream_p << fixed << setprecision(1) << pressure; pres = stream_p.str(); BT => if( pres.length() == 6) bt.printf("%s,%s,%s,%s",puls,temp,pres,SOS); else bt.printf("%s,%s,%s0,%s",puls,temp,pres,SOS);

pc.printf("%s,%s,%s,%s,sent: %d \n\r",puls,temp,pres,SOS,pres.length());

stream_t.str(""); stream_bpm.str(""); stream_p.str(""); SOS="0"; } }