Milan Kkharel
The WMG is an alert system for patients with high or low BPM, as well as falling detection. WMG consists of a wearable device prototype and an Android application. The prototype collects information from sensors about the heartbeat of a patient, the outside temperature, and the atmospheric pressure and sends it over the Bluetooth to the mobile app. The WMG android application is a companion to an alert system that contacts a caregiver via SMS when high/low BPM or falling is detected. Caregiver receives an alert text message with the current location of the patient.
Dependencies: BMP180 DigitDisplay PulseSensor beep mbed
PowerPoint slides with detailed description is available here -> /media/uploads/mkkharel/wmg.pptx
Revision 0:024c65131457, committed 2016-09-09
- Comitter:
- mkkharel
- Date:
- Fri Sep 09 05:31:31 2016 +0000
- Commit message:
- No changes were made
Changed in this revision
diff -r 000000000000 -r 024c65131457 BMP180.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BMP180.lib Fri Sep 09 05:31:31 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/spiridion/code/BMP180/#072073c79cfd
diff -r 000000000000 -r 024c65131457 DigitDisplay.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DigitDisplay.lib Fri Sep 09 05:31:31 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/mkkharel/code/DigitDisplay/#cae630b12d63
diff -r 000000000000 -r 024c65131457 PulseSensor.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PulseSensor.lib Fri Sep 09 05:31:31 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/mkkharel/code/PulseSensor/#9a6ba731d420
diff -r 000000000000 -r 024c65131457 beep.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/beep.lib Fri Sep 09 05:31:31 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/dreschpe/code/beep/#d8e14429a95f
diff -r 000000000000 -r 024c65131457 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Sep 09 05:31:31 2016 +0000
@@ -0,0 +1,280 @@
+// 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
+
+#include "mbed.h"
+#include "BMP180.h"
+#include "PulseSensor.h"
+#include "DigitDisplay.h"
+#include "beep.h"
+#include <string>
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+
+#define PIN_SDA p9 // BPM_180 DataAvailable
+#define PIN_SCL p10 // clock for BPM180
+
+// fadeout effect constants macros
+#define PWM_STEPS 35
+#define PWM_SPEED 50
+#define LED_ON 1
+#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";
+ }
+}
diff -r 000000000000 -r 024c65131457 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Sep 09 05:31:31 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/6c34061e7c34 \ No newline at end of file