Heart Beat Monitoring Device

1// https://www.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g  //
2//  HeartBeat / Pulse Monitoring Device //
3// By MOHD SOHAIL //
4
5
6#define  USE_ARDUINO_INTERRUPTS true //--> Set-up low-level interrupts for most acurate BPM  math.
7#include <PulseSensorPlayground.h> //--> Includes the PulseSensorPlayground  Library. 
8#include <LiquidCrystal.h> //--> Includes the LiquidCrystal Library.
9
10LiquidCrystal  lcd(2, 3, 8, 9, 10, 11); //--> Initialize LiquidCrystal with "lcd". lcd(RS,E,D4,D5,D6,D7).
11
12
13const  int PulseWire = A0; //--> PulseSensor PURPLE WIRE connected to ANALOG PIN 0
14const  int LED_3 = 13; //--> LED to detect when the heart is beating. The LED is connected  to PIN 3 on the Arduino UNO.
15int Threshold = 550; //--> Determine which Signal  to "count as a beat" and which to ignore.
16                     //--> Use the  "Gettting Started Project" to fine-tune Threshold Value beyond default setting.
17                     //--> Otherwise leave the default "550" value. 
18
19
20//----------------------------------------Draw  "Heart" on LCD.
21/*
22                     heart4 heart5
23                       ===   ===
24                             
25              = 00011 11000 00011 11000  =                      11 11       11 11   
26               00111 11100 00111  11100                      111 111     111 111  
27               01111 11110 01111  11110                     1111 1111   1111 1111 
28               11111 11111 11111  11111                    11111 11111 11111 11111
29      heart3   11111 11111 11111  11111   heart6           11111 11111 11111 11111
30               11111 11111 11111  11111                    11111 11111 11111 11111
31               11111 11111 11111  11111                    11111 11111 11111 11111
32              = 01111 11111  11111 11110 =                    1111 11111 11111 1111 
33                                               ------->
34              = 00011 11111 11111 11000 =                      11 11111 11111 11   
35               00001 11111 11111 10000                        1 11111 11111  1    
36               00000 11111 11111 00000                          11111 11111      
37      heart2   00000 11111 11111 00000   heart7                 11111  11111      
38               00000 01111 11110 00000                           1111  1111       
39               00000 00111 11100 00000                            111  111        
40               00000 00011 11000 00000                             11  11         
41              = 00000 00001 10000 00000 =                             1  1           
42                             
43                       ===   ===
44                     heart1 heart8
45
46*/
47
48byte heart1[8] = {B11111, B11111,  B11111, B11111, B01111, B00111, B00011, B00001};
49byte heart2[8] = {B00011, B00001,  B00000, B00000, B00000, B00000, B00000, B00000};
50byte heart3[8] = {B00011, B00111,  B01111, B11111, B11111, B11111, B11111, B01111};
51byte heart4[8] = {B11000, B11100,  B11110, B11111, B11111, B11111, B11111, B11111};
52byte heart5[8] = {B00011, B00111,  B01111, B11111, B11111, B11111, B11111, B11111};
53byte heart6[8] = {B11000, B11100,  B11110, B11111, B11111, B11111, B11111, B11110};
54byte heart7[8] = {B11000, B10000,  B00000, B00000, B00000, B00000, B00000, B00000};
55byte heart8[8] = {B11111, B11111,  B11111, B11111, B11110, B11100, B11000, B10000};
56//----------------------------------------
57
58int  Instructions_view = 500; //--> Variable for waiting time to display instructions  on LCD.
59                               
60PulseSensorPlayground pulseSensor;  //--> Creates an instance of the PulseSensorPlayground object called "pulseSensor"
61
62
63void  setup() {   
64  Serial.begin(9600);//--> Set's up Serial Communication at certain  speed.
65  lcd.begin(16, 2); //--> Initializes the interface to the LCD screen,  and specifies the dimensions (width and height) of the display
66  
67  
68  lcd.createChar(1,  heart1);
69  lcd.createChar(2, heart2);
70  lcd.createChar(3, heart3);
71  lcd.createChar(4,  heart4);
72  lcd.createChar(5, heart5);
73  lcd.createChar(6, heart6);
74  lcd.createChar(7,  heart7);
75  lcd.createChar(8, heart8);
76  
77 
78  
79  lcd.setCursor(0,0);
80  lcd.print("Heart Beat/Pulse"); 
81  lcd.setCursor(0,1);
82  lcd.print(" Monitoring  EIF ");
83  delay(2000);
84
85 
86  pulseSensor.analogInput(PulseWire);   
87  pulseSensor.blinkOnPulse(LED_3); //--> auto-magically blink Arduino's LED with  heartbeat.
88  pulseSensor.setThreshold(Threshold);   
89 
90
91 
92  if (pulseSensor.begin())  {
93    Serial.println("We created a pulseSensor Object !"); //--> This prints  one time at Arduino power-up,  or on Arduino reset.  
94  }
95  
96
97  delay(2000);
98  lcd.clear();
99}
100
101
102
103void loop() {
104  int myBPM = pulseSensor.getBeatsPerMinute();  //--> Calls function on our pulseSensor object that returns BPM as an "int". "myBPM"  hold this BPM value now.
105
106 
107  if (Instructions_view < 500) {
108    Instructions_view++;
109  }
110  
111  if (Instructions_view > 499) {
112    lcd.setCursor(0,0);
113    lcd.print("Put  your finger ");
114    lcd.setCursor(0,1);
115    lcd.print(" on the sensor  ");  
116    delay(1000);
117    lcd.clear();
118    delay(500);
119  }
120
121 
122  if (pulseSensor.sawStartOfBeat()) { //--> If test is "true", then the following  conditions will be executed.
123    Serial.println("  A HeartBeat Happened ! ");  //--> Print a message "a heartbeat happened".
124    Serial.print("BPM: ");  //--> Print phrase "BPM: " 
125    Serial.println(myBPM); //--> Print the value  inside of myBPM. 
126
127   
128
129    lcd.setCursor(1,1);
130    lcd.write(byte(1));
131    lcd.setCursor(0,1);
132    lcd.write(byte(2));
133    lcd.setCursor(0,0);
134    lcd.write(byte(3));
135    lcd.setCursor(1,0);
136    lcd.write(byte(4));
137    lcd.setCursor(2,0);
138    lcd.write(byte(5));
139    lcd.setCursor(3,0);
140    lcd.write(byte(6));
141    lcd.setCursor(3,1);
142    lcd.write(byte(7));
143    lcd.setCursor(2,1);
144    lcd.write(byte(8));
145 
146
147   
148    lcd.setCursor(5,0);
149    lcd.print("Heart Rate");
150    lcd.setCursor(5,1);
151    lcd.print(": ");
152    lcd.print(myBPM);
153    lcd.print(" ");
154    lcd.print("BPM     ");
155  
156    
157    Instructions_view = 0; 
158  }
159 
160  
161  delay(20); //-->  considered best practice in a simple sketch.
162}
163