MONITORING A WEATHER STATION USING LoRa MODULE

// Include the SX1272 and SPI library: 
#include "SX1272.h"
#include <SPI.h>

#include "DHT.h"     // add the library with which our sensor works 
#include <Wire.h>

#define DHTPIN 13     // pin where we connect our sensor
#define DHTTYPE DHT11     // DHT 11 Sensor
#define BMP085_ADDRESS 0x77     // I2C address of BMP085
DHT dht(DHTPIN, DHTTYPE);     // pin we work and the type of sensor

const unsigned char OSS = 0;     // oversampling Setting
int ac1;     // calibration values 
int ac2;
int ac3;
unsigned int ac4;
unsigned int ac5;
unsigned int ac6;
int b1;
int b2;
int mb;
int mc;
int md;
long b5;     // b5 is calculated in BMP085 Get Temperature

int e;
char message1 [60];

void setup()
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  
  // Power ON the module
  sx1272.ON();
  
  // Set transmission mode and print the result
  e = sx1272.setMode(4);
  Serial.println(F("Setting Mode: state "));
  Serial.println(e, DEC);
  
  // Select frequency channel
  e = sx1272.setChannel(CH_12_868);
  Serial.println(F("Setting Channel: state "));
  Serial.println(e, DEC);
  
  // Select output power (Max, High or Low)
  e = sx1272.setPower('H');
  Serial.println(F("Setting Power: state "));
  Serial.println(e, DEC);
  
  // Set the node address and print the result
  e = sx1272.setNodeAddress(2);
  Serial.println(F("Setting node address: state "));
  Serial.println(e, DEC);
  
  // Print a success message
  Serial.println(F("SX1272 successfully configured"));

  Serial.println("Sensors: DHT11 and BMP085:");
  dht.begin();
  Wire.begin();
  bmp085Calibration();
}

void loop()
{
  int h = dht.readHumidity();     // h in the float h - DHT11
  int t = dht.readTemperature();     // save reading variable DHT11
// calculation temperature - BMP085
  float temperature = bmp085GetTemperature(bmp085ReadUT());
 // barometric Pressure - BMP085
  float pressure = bmp085GetPressure(bmp085ReadUP());             
  float mmHg = pressure / 133.322368;
  float altitude = calcAltitude(pressure);     // uncompensated calculation in meters 
   
  if (isnan(t) || isnan(h))     // check if the variables are numbers indicated
  {
    Serial.println("Fallo al leer del sensor DHT"); 
  } else {
    lcd.print("HUMIDITY = ");     // relative Humidity Sensor DHT11 - LCD
    Serial.print(h);     // relative Humidity Sensor DHT11 - Serial
    Serial.print(" %\t");
    Serial.print("Temperatura: ");
    Serial.print(t);
    Serial.println(" *C\n");       
    Serial.print("Presion Atmosferica: ");
    Serial.print(mmHg, 2); 
    Serial.println(" mmHg\t");
    Serial.print("Temperatura: ");
    Serial.print(temperature, 2);     // temperature Sensor BMP085 - Serial
    Serial.println(" *C\t");
    Serial.print("Altitud: ");
    Serial.print(altitude, 2); 
    Serial.println(" metros");
    Serial.println();              
  }   
  delay(1000);
}
// load calibration values of pressure and temperature
void bmp085Calibration()              
{
  ac1 = bmp085ReadInt(0xAA);
  ac2 = bmp085ReadInt(0xAC);
  ac3 = bmp085ReadInt(0xAE);
  ac4 = bmp085ReadInt(0xB0);
  ac5 = bmp085ReadInt(0xB2);
  ac6 = bmp085ReadInt(0xB4);
  b1 = bmp085ReadInt(0xB6);
  b2 = bmp085ReadInt(0xB8);
  mb = bmp085ReadInt(0xBA);
  mc = bmp085ReadInt(0xBC);
  md = bmp085ReadInt(0xBE);
}
     // calculate the temperature in degrees Celsius
float bmp085GetTemperature(unsigned int ut){   
  long x1, x2;
  x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
  x2 = ((long)mc << 11)/(x1 + md);
  b5 = x1 + x2;
  float temp = ((b5 + 8)>>4);
  temp = temp /10;
  return temp;
}

long bmp085GetPressure(unsigned long up){     // calculation of pressure loaded
  long x1, x2, x3, b3, b6, p;
  unsigned long b4, b7;
  b6 = b5 - 4000;
  x1 = (b2 * (b6 * b6)>>12)>>11;     // calculation of B3
  x2 = (ac2 * b6)>>11;

  x3 = x1 + x2;
  b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2;
  x1 = (ac3 * b6)>>13;     // calculation of B4
  x2 = (b1 * ((b6 * b6)>>12))>>16;  
  x3 = ((x1 + x2) + 2)>>2;
  b4 = (ac4 * (unsigned long)(x3 + 32768))>>15;
  b7 = ((unsigned long)(up - b3) * (50000>>OSS));
  if (b7 < 0x80000000)
    p = (b7<<1)/b4;
  else
    p = (b7/b4)<<1;
  x1 = (p>>8) * (p>>8);
  x1 = (x1 * 3038)>>16;
  x2 = (-7357 * p)>>16;
  p += (x1 + x2 + 3791)>>4;
  long temp = p;
  return temp;
}

char bmp085Read(unsigned char address)     // read 1 byte of BMP085 'address'
{
  unsigned char data;
  Wire.beginTransmission(BMP085_ADDRESS);
  Wire.write(address);
  Wire.endTransmission();
  Wire.requestFrom(BMP085_ADDRESS, 1);
  while(!Wire.available());
  return Wire.read();
}

int bmp085ReadInt(unsigned char address)      // read 2 bytes of BMP085
{
  unsigned char msb, lsb;
  Wire.beginTransmission(BMP085_ADDRESS);
  Wire.write(address);
  Wire.endTransmission();
  Wire.requestFrom(BMP085_ADDRESS, 2);
  while(Wire.available()<2);
  msb = Wire.read();
  lsb = Wire.read();
  return (int) msb<<8 | lsb;
}

unsigned int bmp085ReadUT(){     // read uncompensated temperature value
  unsigned int ut;

Wire.beginTransmission(BMP085_ADDRESS);     // write 0x2E 
  Wire.write(0xF4);     // in the register 0xF4
  Wire.write(0x2E);
  Wire.endTransmission();
  delay(5);
  ut = bmp085ReadInt(0xF6);     // read 2 bytes of 0xF6 and 0xF7 records
  return ut;
}

unsigned long bmp085ReadUP(){     // read  uncompensated value - pressure
  unsigned char msb, lsb, xlsb;
  unsigned long up = 0; 
  Wire.beginTransmission(BMP085_ADDRESS);  
// write 0x34 + (OSS << 6) in the register 0xF4
  Wire.write(0xF4);
  Wire.write(0x34 + (OSS<<6));
  Wire.endTransmission();
  delay(2 + (3<<OSS));     // awaiting conversion
  msb = bmp085Read(0xF6);     // read 0xF6 (MSB) 0xF7 (LSB)
  lsb = bmp085Read(0xF7);     //  and 0xF8 records (XLSB)
  xlsb = bmp085Read(0xF8);
  up = (((unsigned long) msb << 16) | ((unsigned long) lsb << 8) | (unsigned long) xlsb) >> (8-OSS);
  return up;
}

void writeRegister(int deviceAddress, byte address, byte val) {
  Wire.beginTransmission(deviceAddress);     // transmission begins  
  Wire.write(address);     // sending registration address
  Wire.write(val);     // sending write value
  Wire.endTransmission();     // end transmission
}
int readRegister(int deviceAddress, byte address){
  int v;
  Wire.beginTransmission(deviceAddress);
  Wire.write(address);     // reading log
  Wire.endTransmission();
  Wire.requestFrom(deviceAddress, 1);     // reads a byte
  while(!Wire.available()) {                                                                              
  }
  v = Wire.read();
  return v;
}
float calcAltitude(float pressure){
  float A = pressure/101325;
  float B = 1/5.25588;
  float C = pow(A,B);
  C = 1 - C;
  C = C /0.0000225577;
  return C;
}