Covid19 Health Monitoring System

1#include <ESP8266WiFi.h>
2#include <Wire.h>
3#include <Ticker.h>
4#include  "PubSubClient.h"
5#include "MAX30105.h"
6#include "heartRate.h"
7
8#define  wifi_ssid "******"
9#define wifi_password "***********"
10#define mqtt_server  "******" //"m23.cloudmqtt.com"
11#define mqttUser "*******"//"nrxyvxfh"
12#define  mqttPassword "******"//"pBqLKJYPlGiV"
13
14MAX30105 particleSensor;
15Ticker  blinker;
16char data[50];
17float temperature;
18
19const byte RATE_SIZE = 4;  //Increase this for more averaging. 4 is good.
20byte rates[RATE_SIZE]; //Array  of heart rates
21byte rateSpot = 0;
22long lastBeat = 0; //Time at which the last  beat occurred
23float beatsPerMinute;
24int beatAvg;
25float vref = 3.3;
26float  resolution = vref / 1023;
27
28
29WiFiClient espClient;
30PubSubClient client(espClient);
31
32
33void  setup()
34{
35  Serial.begin(115200);
36  blinker.attach(30, changeState);
37  Serial.println("Initializing...");
38  WiFi.begin(wifi_ssid, wifi_password);
39
40  while (WiFi.status() != WL_CONNECTED) {
41    delay(500);
42    Serial.println("Connecting  to WiFi..");
43  }
44  Serial.println("Connected to the WiFi network");
45
46  client.setServer(mqtt_server, 8883);
47
48  while (!client.connected()) {
49    Serial.println("Connecting to MQTT...");
50
51    if (client.connect("ESP8266Client",  mqttUser, mqttPassword )) {
52
53      Serial.println("connected");
54
55    } else {
56
57      Serial.print("failed with state ");
58      Serial.print(client.state());
59      delay(2000);
60
61    }
62
63    // Initialize sensor
64    if (!particleSensor.begin(Wire,  I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
65    {
66      Serial.println("MAX30102  was not found. Please check wiring/power. ");
67      while (1);
68    }
69    Serial.println("Place your index finger on the sensor with steady pressure.");
70
71    particleSensor.setup(); //Configure sensor with default settings
72    particleSensor.setPulseAmplitudeRed(0x0A);  //Turn Red LED to low to indicate sensor is running
73    particleSensor.setPulseAmplitudeGreen(0);  //Turn off Green LED
74  }
75}
76
77void loop()
78{
79  long irValue = particleSensor.getIR();
80
81  if (checkForBeat(irValue) == true)
82  {
83    //We sensed a beat!
84    long  delta = millis() - lastBeat;
85    lastBeat = millis();
86
87    beatsPerMinute  = 60 / (delta / 1000.0);
88
89    if (beatsPerMinute < 255 && beatsPerMinute >  20)
90    {
91      rates[rateSpot++] = (byte)beatsPerMinute; //Store this reading  in the array
92      rateSpot %= RATE_SIZE; //Wrap variable
93
94      //Take  average of readings
95      beatAvg = 0;
96      for (byte x = 0 ; x < RATE_SIZE  ; x++)
97        beatAvg += rates[x];
98      beatAvg /= RATE_SIZE;
99    }
100
101  }
102
103  // Serial.print("IR=");
104  //Serial.print(irValue);
105  //Serial.print(",  BPM=");
106  //Serial.print(beatsPerMinute);
107  //Serial.print(", Avg BPM=");
108  //Serial.print(beatAvg);
109
110  temperature = analogRead(A0);
111  temperature  = (temperature * resolution);
112  temperature = temperature * 100;
113  //temperature  = (1.8 * temperature) + 32;
114  //Serial.print(", Avg Temperature =");
115  //  Serial.print(temperature);
116
117
118  if (irValue < 50000)
119    Serial.print("  No finger?");
120
121  // Serial.println();
122}
123
124void changeState()
125{
126  Serial.println("500  Done");
127  sprintf(data, "%f,%f", beatsPerMinute, temperature);
128  Serial.print(data);
129  client.publish("BPM/Temperature", data);
130
131
132}