Sending analog value from serial monitor to mit app inventor

I am trying to read in an analog value (myBPM) using the adafruit flora app using pulse sensor. I want to then send that variable (myBPM) over bluetooth to an app created on MIT appinventor. I am able to get the sensor to detect heart rate and print it on to the serial monitor on my computer. However, I am lost on how to code the heart rate (myBPM) to be sent over bluetooth to the appinventor. I configured the bluetooth using published code from the adafruit manufacturer.
I have attached the arduino file containing both tabs of code.

Code to sense heart rate and send to mit app inventor.

/*********************************************************************
 This is an example for our nRF51822 based Bluefruit LE modules

 Pick one up today in the adafruit shop!

 Adafruit invests time and resources providing this open source code,
 please support Adafruit and open-source hardware by purchasing
 products from Adafruit!

 MIT license, check LICENSE for more information
 All text above, and the splash screen below must be included in
 any redistribution
*********************************************************************/

/*
    Please note the long strings of data sent mean the *RTS* pin is
    required with UART to slow down data sent to the Bluefruit LE!
*/

#include <Arduino.h>
#include <SPI.h>
#include "Adafruit_BLE.h"
#include "Adafruit_BluefruitLE_SPI.h"
#include "Adafruit_BluefruitLE_UART.h"
#include "BluefruitConfig.h"

Adafruit_BluefruitLE_UART; 

#if SOFTWARE_SERIAL_AVAILABLE
  #include <SoftwareSerial.h>
#endif

//#ifdef Serial1    // this makes it not complain on compilation if there's no Serial1
  #define BLUEFRUIT_HWSERIAL_NAME      Serial1
//#endif




/* ...or hardware serial, which does not need the RTS/CTS pins. Uncomment this line */
Adafruit_BluefruitLE_UART ble(Serial1, BLUEFRUIT_UART_MODE_PIN);

/* ...hardware SPI, using SCK/MOSI/MISO hardware SPI pins and then user selected CS/IRQ/RST */
 //Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);

/* ...software SPI, using SCK/MOSI/MISO user-defined SPI pins and then user selected CS/IRQ/RST */
//Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_SCK, BLUEFRUIT_SPI_MISO,
//                             BLUEFRUIT_SPI_MOSI, BLUEFRUIT_SPI_CS,
//                             BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);


// A small helper
 void error(const __FlashStringHelper*err) {
  Serial.println(err);
  while (1);
 }

/* The service information */


/**************************************************************************/
/*!
    @brief  Sets up the HW an the BLE module (this function is called
            automatically on startup)
*/
/**************************************************************************/
#define USE_ARDUINO_INTERRUPTS true    // Set-up low-level interrupts for most acurate BPM math.
#include <PulseSensorPlayground.h>     // Includes the PulseSensorPlayground Library.   

//  Variables
const int PulseWire = A7;       // PulseSensor PURPLE WIRE connected to ANALOG PIN 0
const int LED7 = 7;          // The on-board Arduino LED, close to PIN 13.
int Threshold = 550;           // Determine which Signal to "count as a beat" and which to ignore.
                               // Use the "Gettting Started Project" to fine-tune Threshold Value beyond default setting.
                               // Otherwise leave the default "550" value. 
                               
PulseSensorPlayground pulseSensor;  // Creates an instance of the PulseSensorPlayground object called "pulseSensor"

void setup()
{
  while (!Serial); // required for Flora & Micro
  delay(500);

  boolean success;

  Serial.begin(115200);
  Serial.println(F("Adafruit Bluefruit Heart Rate Monitor (HRM) Example"));
  Serial.println(F("---------------------------------------------------"));

  randomSeed(micros());

  /* Initialise the module */
  Serial.print(F("Initialising the Bluefruit LE module: "));

  if ( !ble.begin(VERBOSE_MODE) )
  {
    error(F("Couldn't find Bluefruit, make sure it's in CoMmanD mode & check wiring?"));
  }
  Serial.println( F("OK!") );

  /* Perform a factory reset to make sure everything is in a known state */
  Serial.println(F("Performing a factory reset: "));
  if (! ble.factoryReset() ){
       error(F("Couldn't factory reset"));
  }

  /* Disable command echo from Bluefruit */
  ble.echo(false);

  Serial.println("Requesting Bluefruit info:");
  /* Print Bluefruit information */
  ble.info();

  // this line is particularly required for Flora, but is a good idea
  // anyways for the super long lines ahead!
  ble.setInterCharWriteDelay(5); // 5 ms

  /* Change the device name to make it easier to find */
  Serial.println(F("Setting device name to 'Bluefruit HRM': "));

  if (! ble.sendCommandCheckOK(F("AT+GAPDEVNAME=Bluefruit HRM")) ) {
    error(F("Could not set device name?"));
  }


  Serial.begin(9600);          // For Serial Monitor

  // Configure the PulseSensor object, by assigning our variables to it. 
  pulseSensor.analogInput(PulseWire);   
  pulseSensor.blinkOnPulse(LED7);       //auto-magically 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("We created a pulseSensor Object !");  //This prints one time at Arduino power-up,  or on Arduino reset.  
  }


}

void loop() {
  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.println("♥  A HeartBeat Happened ! "); // If test is "true", print a message "a heartbeat happened".
 Serial.print("BPM: ");                        // Print phrase "BPM: " 
 Serial.println(myBPM);                        // Print the value inside of myBPM. 

    delay(500);

  char y = myBPM;
  ble.print("Heart Rate");
  ble.println(y);
    
}
}

BluefruitConfig.h (3.17 KB)

heartrateapril3.ino (5.49 KB)

Sending analog value from serial monitor to mit app inventor

That is NOT what you are doing, which is a good thing, because THAT can't be done.

However, I am lost on how to code the heart rate (myBPM) to be sent over bluetooth

The bluetooth device is a serial device, so you talk to it EXACTLY like you talk to the Serial Monitor app.

What the device it is paired with does with the data is NOT an Arduino problem.