#define USE_ARDUINO_INTERRUPTS true
#define DEBUG true
#include "WiFiEsp.h"
#include "secrets.h"
#include <PulseSensorPlayground.h> // Includes the PulseSensorPlayground Library.
#include "ThingSpeak.h" // always include thingspeak header file after other header files and custom macros
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
WiFiEspClient client;
// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(10, 11); // RX, TX
#define ESP_BAUDRATE 19200
#else
#define ESP_BAUDRATE 115200
#endif
unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
PulseSensorPlayground pulseSensor;
const int PulseWire = A0; // PulseSensor PURPLE WIRE connected to ANALOG PIN 0
const int LED13 = 13; // The on-board Arduino LED, close to PIN 13.
int Threshold = 550;
float myTemp;
int myBPM;
String BPM;
String temp;
int error;
int panic;
int raw_myTemp;
float Voltage;
float tempC;
void setup() {
Serial.begin(115200); //Initialize serial
pulseSensor.analogInput(PulseWire);
pulseSensor.blinkOnPulse(LED13); //blink Arduino's LED with heartbeat.
pulseSensor.setThreshold(Threshold);
// Double-check the "pulseSensor" object was created and "began" seeing a signal.
if (pulseSensor.begin()) {
Serial.println("!!!System Start!!!"); //This prints one time at Arduino power-up, or on Arduino reset.
}
while(!Serial){
; // wait for serial port to connect. Needed for Leonardo native USB port only
}
// initialize serial for ESP module
setEspBaudRate(ESP_BAUDRATE);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo native USB port only
}
Serial.print("Searching for ESP8266...");
// initialize ESP module
WiFi.init(&Serial1);
// check for the presence of the shield
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue
while (true);
}
Serial.println("found it!");
ThingSpeak.begin(client); // Initialize ThingSpeak
}
void loop() {
// Connect or reconnect to WiFi
if(WiFi.status() != WL_CONNECTED){
Serial.print("Attempting to connect to SSID: ");
Serial.println(SECRET_SSID);
while(WiFi.status() != WL_CONNECTED){
WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this line if using open or WEP network
Serial.print(".");
delay(5000);
}
Serial.println("\nConnected.");
}
get_pulseSensor();
get_tempSensor();
delay(5000); // Wait 5 seconds to update the channel again
}
void get_pulseSensor(){
int myBPM = pulseSensor.getBeatsPerMinute(); // Calls function on our pulseSensor object that returns BPM as an "int".
// "myBPM" hold this BPM value now.
if (pulseSensor.sawStartOfBeat()) { // Constantly test to see if "a beat happened".
Serial.print("BPM: ");
Serial.println(myBPM); // Print the value inside of myBPM.
} else
{
Serial.println("BPM not detected");
}
// Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
// pieces of information in a channel. Here, we write to field 1.
int x = ThingSpeak.writeField(myChannelNumber, 1, myBPM, myWriteAPIKey);
if(x == 200){
Serial.println("Pulse Sensor update successful.");
}
else{
Serial.println("Problem updating Pulse Sensor. HTTP error code " + String(x));
}
}
void get_tempSensor(){
raw_myTemp = analogRead(A1);
Voltage = (raw_myTemp / 1023.0) * 5000; // 5000 to get millivots.
tempC = Voltage * 0.1;
myTemp = tempC;
String tempMessage = "Temperature: ";
tempMessage += myTemp;
tempMessage += "\" Celcius";
Serial.println(tempMessage);
// Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
// pieces of information in a channel. Here, we write to field 2.
int x = ThingSpeak.writeField(myChannelNumber, 2, myTemp, myWriteAPIKey);
if(x == 200){
Serial.println("Temperature Sensor update successful.");
}
else{
Serial.println("Problem updating Temperature Sensor. HTTP error code " + String(x));
}
}
// This function attempts to set the ESP8266 baudrate. Boards with additional hardware serial ports
// can use 115200, otherwise software serial is limited to 19200.
void setEspBaudRate(unsigned long baudrate){
long rates[6] = {115200,74880,57600,38400,19200,9600};
Serial.print("Setting ESP8266 baudrate to ");
Serial.print(baudrate);
Serial.println("...");
for(int i = 0; i < 6; i++){
Serial1.begin(rates[i]);
delay(100);
Serial1.print("AT+UART_DEF=");
Serial1.print(baudrate);
Serial1.print(",8,1,0,0\r\n");
delay(100);
}
Serial1.begin(baudrate);
}
