Smart Plant Monitoring System

				#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <DHT.h>

// Define sensor and display pins
#define DHTPIN 2
#define DHTTYPE DHT11
#define MOISTURE_SENSOR_PIN A0
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

// Initialize OLED display
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  // Start serial communication
  Serial.begin(115200);

  // Initialize the DHT sensor
  dht.begin();

  // Initialize the OLED display
  if (!display.begin(SSD1306_I2C_ADDRESS, OLED_RESET)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  display.display();
  delay(2000);
  display.clearDisplay();

  // Initialize moisture sensor pin
  pinMode(MOISTURE_SENSOR_PIN, INPUT);
}

void loop() {
  // Read temperature and humidity from DHT11 sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Read soil moisture level
  int moistureLevel = analogRead(MOISTURE_SENSOR_PIN);
  moistureLevel = map(moistureLevel, 1023, 0, 0, 100); // Convert to percentage

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Display data on the OLED screen
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("Temp: ");
  display.print(temperature);
  display.println(" *C");

  display.print("Humidity: ");
  display.print(humidity);
  display.println(" %");

  display.print("Soil Moisture: ");
  display.print(moistureLevel);
  display.println(" %");

  display.display();

  // Print data to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" *C");

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  Serial.print("Soil Moisture: ");
  Serial.print(moistureLevel);
  Serial.println(" %");

  // Wait for a second before the next loop
  delay(1000);
}