Simple Weather monitoring With Lora, Arduino and Sensors

#include <SPI.h>
#include <LoRa.h>

#include "DHT.h"
#include <Adafruit_BMP280.h>

#define DHTPIN 7
#define DHTTYPE DHT11
Adafruit_BMP280 bmp; 

float Pressure;
float Altitude;
int ldr = 4;
int counter = 0;
int Dummyvalue;

DHT dht(DHTPIN, DHTTYPE);
long randNumber; //Create Random Number To Avoid Transmission Loss For First Digit

void setup() 
{
  Serial.begin(115200);
  
 randomSeed(analogRead(0));
 dht.begin();
 
if (!bmp.begin()) {
    Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
    while (1);
  }

   pinMode(ldr, OUTPUT);
  while (!Serial);
  
  Serial.println(" Lora Weather Station By ZenoModiff ");

  if (!LoRa.begin(915E6)) {
    Serial.println("Starting LoRa failed!");
  }
  else
  {
   Serial.println("Starting LoRa Sucesses!");
  }
}
void loop()
{
 Serial.println();
 Serial.print("Sending packet: ");
 Serial.println(counter);
 randNumber = random(1000);

 
 int randNumber = random(100); Dummyvalue = randNumber;
 double ldrvalue = analogRead(ldr);
 float h = dht.readHumidity();
 float t = dht.readTemperature();
 float f = dht.readTemperature(true);
 float pressure = (bmp.readPressure()/100); Pressure = pressure;
 int altitude =  (bmp.readAltitude(1019.66)); Altitude = altitude; 
  

  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  String Datastring = String(Dummyvalue) + (";") + String(t) + (";") + String(h) + (";") + String(ldrvalue) + (";") + String (Pressure) + (";") + String (Altitude);
 
  Serial.println(Datastring);
  LoRa.beginPacket();      
  LoRa.print(Datastring);
  LoRa.print(counter);
  LoRa.endPacket();
  counter++;
  
  delay(3000);
  
}

#include <Wire.h> 
#include <SPI.h>
#include <LoRa.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() 
{  
  
  Serial.begin(115200);

  lcd.begin();
  lcd.setCursor(0,0);
  lcd.print("LoRa Weather");
  lcd.setCursor(0,3);
  lcd.print("Station");
  delay(2000);
  lcd.clear();
  lcd.print("By : Aptanta");
  lcd.setCursor(0,3);
  lcd.print("NIM : 2033429744");
  delay (2000);
  while (!Serial);

  Serial.println("LoRa Receiver By : Aptanta");

  if (!LoRa.begin(915E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
}

void loop() {
  
  String packet = "";
  
  int packetSize = LoRa.parsePacket();
  if (packetSize) {

    Serial.print("Received packet :-- ");

    while (LoRa.available()) {
    
    packet = LoRa.readString();
    }
    
    Serial.println(packet);
    Serial.println();

int firstcommaIndex   = packet.indexOf(';');
int secondCommaIndex  = packet.indexOf(';', firstcommaIndex+1);
int thirdCommaIndex   = packet.indexOf(';', secondCommaIndex+1);
int fourthCommaIndex  = packet.indexOf(';', thirdCommaIndex+1);   
int fifthCommaIndex   = packet.indexOf(';', fourthCommaIndex+1);
int sixthCommaIndex   = packet.indexOf(';', fifthCommaIndex+1);

String firstValue  =  packet.substring( 0, firstcommaIndex);
String secondValue =  packet.substring(firstcommaIndex+1, secondCommaIndex);
String thirdValue  =  packet.substring(secondCommaIndex+1, thirdCommaIndex);
String fourthValue =  packet.substring(thirdCommaIndex +1, fourthCommaIndex);
String fifthValue  =  packet.substring(fourthCommaIndex+1, fifthCommaIndex);
String sixthValue  =  packet.substring(fifthCommaIndex+1,  sixthCommaIndex);

Serial.print("Temp:-"); Serial.println(secondValue);
Serial.print("Humi:-"); Serial.println(thirdValue);
Serial.print("Ldr:-"); Serial.println(fourthValue); 
Serial.print("Pressure:-"); Serial.println(fifthValue);  
Serial.print("Altitude:-"); Serial.println(sixthValue); 
Serial.println();

/*since we can't print the first digit 
it is a dummy value sent by the LoRa String 
in case of transmission Loss*/

lcd.clear(); lcd.setCursor(0,0);
lcd.print("Temp:-"); lcd.println(secondValue);
delay(2000);

lcd.clear(); lcd.setCursor(0,0);
lcd.print("Humi:-"); lcd.println(thirdValue);
delay(2000);

lcd.clear(); lcd.setCursor(0,0);
lcd.print("Ldr:-"); lcd.println(fourthValue);
delay(2000);

lcd.clear(); lcd.setCursor(0,0);
lcd.print("Pres:-"); lcd.println(fifthValue);
delay(2000);

lcd.clear(); lcd.setCursor(0,0);
lcd.print("Alti:-"); lcd.println(sixthValue);
delay(2000);

}
}