Arduino flower watering system with oled display

// needed libraries
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width,  in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels

// declare an SSD1306 display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

const int dry = 500; //the value at which the plant is dry

const int pumpPin = 10; //pump connected to pin 10
const int soilSensor = A0; //the soil moisture sensor reads the value from the analog pin A0

void setup() {
   Serial.begin(9600);

  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

  delay(2000);         // wait for initializing
  oled.clearDisplay(); // clear display

  oled.setTextSize(4);          // text size
  oled.setTextColor(WHITE);     // text color
  oled.setCursor(0, 0);        // position to display
  oled.println("Hello");      //inscription when switching on
  oled.display();             //activating the screen
  delay(3000);

  //oled Loading script
  oled.clearDisplay();
  oled.setCursor(0, 0);
  oled.setTextSize(3);  
  oled.println("Loading");
  oled.setCursor(80, 12);
  oled.setTextSize(3);

   //loading animation(dots)
  oled.println(".");
  oled.display();
  delay(1000);
  oled.setCursor(95, 12);
  oled.setTextSize(3); 
  oled.println(".");
  oled.display();  
  delay(1000);
  oled.setCursor(110, 12);
  oled.setTextSize(3); 
  oled.println(".");
  oled.display(); 
  
  //water intake by a pump
  pinMode(pumpPin, OUTPUT);
  pinMode(soilSensor, INPUT);
  Serial.begin(9600);
  digitalWrite(pumpPin, HIGH);
  delay(500);
}

void loop() {
  delay(1000);
  oled.clearDisplay();

  oled.setTextSize(2);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 0);
  oled.println("Fern :) "); //the name of your plant that will be visible all the time
  oled.display();
  
  // read current moisture
  int moisture = analogRead(soilSensor);
  Serial.println(moisture);
  oled.setTextSize(1);
  oled.println("value: " + String(moisture));
  oled.display();
  delay(5000);
  
  if (moisture >= dry) {
    // the soil is too dry, water!
    Serial.println("Watering starts now..moisture is " + String(moisture));
    oled.println("watering required");
    oled.display();
    digitalWrite(pumpPin, LOW);
   

    // keep watering for 5 sec
    delay(2000);

    // turn off water
    digitalWrite(pumpPin, HIGH);
    Serial.println("Done watering.");
    oled.setTextSize(2);
    oled.setCursor(0, 0);
    oled.clearDisplay();
    oled.println("Done ");
    oled.println("Watering");
    oled.display();
  } else {
    Serial.println("Moisture is adequate. No watering needed " + String(moisture));
    oled.println("watering not required");
    oled.display();
  }
}