Lake water pollution control and wastage clearance

#include <Servo.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>
SoftwareSerial ArduinoUno(9, 10);

LiquidCrystal_I2C lcd(0x27, 2, 16);

const int TRIG_PIN = 6;             // Arduino pin connected to Ultrasonic Sensor's TRIG pin
const int ECHO_PIN = 7;             // Arduino pin connected to Ultrasonic Sensor's ECHO pin
const int BUZZER_PIN = 3;           // Arduino pin connected to Piezo Buzzer's pin
const int DISTANCE_THRESHOLD = 30;  // centimeters

int sensorPin = A0;

// variables will change:
float duration_us, distance_cm;

const int SERVO_PIN = 8;                 // Arduino pin connected to Servo Motor's pin
const int SENSOR_PIN = 5;                // Arduino pin connected to DS18B20 sensor's DATA pin
const float TEMPERATURE_THRESHOLD = 26;  // °C

Servo servo;                         // create servo object to control a servo
OneWire oneWire(SENSOR_PIN);         // setup a oneWire instance
DallasTemperature sensor(&oneWire);  // pass oneWire to DallasTemperature library
float temperature;
int angle;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  ArduinoUno.begin(4800);       // initialize serial port
  pinMode(TRIG_PIN, OUTPUT);    // set arduino pin to output mode
  pinMode(ECHO_PIN, INPUT);     // set arduino pin to input mode
  pinMode(BUZZER_PIN, OUTPUT);  // set arduino pin to output mode
  servo.attach(SERVO_PIN);      // attaches the servo on pin 9 to the servo object

  lcd.init();
  lcd.backlight();

  servo.write(0);
  sensor.begin();  // initialize the sensor
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  // measure duration of pulse from ECHO pin
  duration_us = pulseIn(ECHO_PIN, HIGH);
  // calculate the distance
  distance_cm = 0.017 * duration_us;
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  sensor.requestTemperatures();             // send the command to get temperatures
  temperature = sensor.getTempCByIndex(0);  // read temperature in Celsius
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  if (distance_cm < DISTANCE_THRESHOLD)
    digitalWrite(BUZZER_PIN, HIGH);  // turn on Piezo Buzzer
  else
    digitalWrite(BUZZER_PIN, LOW);  // turn off Piezo Buzzer
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  if (temperature > TEMPERATURE_THRESHOLD)
    angle = 45;  // set angle to 45 degrees
  else if (temperature < TEMPERATURE_THRESHOLD)
    angle = 30;  // set angle to 30 degrees
  else
    angle = 0;         // set angle to 0 degrees
  servo.write(angle);  // rotate servo motor
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  int sensorValue = analogRead(sensorPin);
  Serial.println(sensorValue);
  int turbidity = map(sensorValue, 0, 750, 100, 0);
  delay(100);
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  //delay(500);
  // print the value to Serial Monitor
  Serial.print("distance: ");
  Serial.print(distance_cm);
  Serial.println(" cm");
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  // print to serial
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print("°C => servo angle: ");
  Serial.println(angle);
  //////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////
  lcd.setCursor(0, 0);
  lcd.print("turbidity:");
  lcd.print("   ");
  lcd.setCursor(10, 0);
  lcd.print(turbidity);
  delay(100);
  if (turbidity < 20) {
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    lcd.setCursor(0, 1);
    lcd.print(" its CLEAR ");
  }
  if ((turbidity > 20) && (turbidity < 50)) {
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    lcd.setCursor(0, 1);
    lcd.print(" its CLOUDY ");
  }
  if (turbidity > 50) {
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    lcd.setCursor(0, 1);
    lcd.print(" its DIRTY ");
  }

  ArduinoUno.print(temperature);
  ArduinoUno.println("x");
  delay(30);

  ArduinoUno.print(turbidity);
  ArduinoUno.println("y");
  delay(30);

  ArduinoUno.print(distance_cm);
  ArduinoUno.println("z");
  delay(30);
}