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

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET    -1 // Reset pin # (or -1 if sharing Arduino reset pin)

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int soilPin = 34;      // Analog pin connected to soil moisture sensor
const int brightnessPin = 34; // Analog pin connected to potentiometer
int brightness = 255;         // Initial brightness value (0-255)

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

  // Initialize OLED display
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  // Set up the brightness control
  pinMode(brightnessPin, INPUT);
}

void loop() {
  int soilValue = analogRead(soilPin);
  float moisturePercent = map(soilValue, 0, 1023, 0, 100); // Convert analog reading to percentage

  // Read brightness from potentiometer
  brightness = analogRead(brightnessPin) / 4; // Map 0-1023 to 0-255

  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print("Soil Moisture: ");
  display.print(moisturePercent);
  display.println("%");

  display.display();
  display.dim(brightness);

  delay(1000); // Delay between readings
}