How to make Temperature Pressure and Altitude Monitor with HC 05 Module using Smartphone

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             CODE 

 #include <Wire.h>

#include <SPI.h>

#include <Adafruit_BMP280.h>

#include <Adafruit_Sensor.h>

#include <SoftwareSerial.h>

Adafruit_BMP280 bmp; // I2C

Adafruit_Sensor *bmp_temp = bmp.getTemperatureSensor();

Adafruit_Sensor *bmp_pressure = bmp.getPressureSensor();

SoftwareSerial bt(10, 11); // RX, TX (Bluetooth module)

void setup() {

  Serial.begin(9600);     // Serial Monitor کے لیے

  bt.begin(9600);         // Bluetooth کے لیے

  Serial.println(F("BMP280 Sensor initializing..."));

  bt.println(F("BMP280 Sensor initializing..."));

  if (!bmp.begin(0x76)) {

    Serial.println(F("Sensor not found!"));

    bt.println(F("Sensor not found!"));

    while (1) delay(10);

  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,

                  Adafruit_BMP280::SAMPLING_X2,

                  Adafruit_BMP280::SAMPLING_X16,

                  Adafruit_BMP280::FILTER_X16,

                  Adafruit_BMP280::STANDBY_MS_500);

  bmp_temp->printSensorDetails();

}

void loop() {

  sensors_event_t temp_event, pressure_event;

  bmp_temp->getEvent(&temp_event);

  bmp_pressure->getEvent(&pressure_event);

  float temperature = bmp.readTemperature();

  float pressure = pressure_event.pressure;

  float altitude = bmp.readAltitude(1013.25);

  // Serial Monitor

  Serial.print("Temp:");

  Serial.print(temperature);

  Serial.print(" °C | Pressure: ");

  Serial.print(pressure);

  Serial.print(" hPa | Altitude: ");

  Serial.print(altitude);

  Serial.println(" m");

  // Bluetooth Output

  bt.print("Temp:");

  bt.print(temperature);

  bt.print("°C|Pres:");

  bt.print(pressure);

  bt.print("hPa|Alti:");

  bt.print(altitude);

  bt.println(" m");

  delay(1000);

}