/*
 * Last updated on 8/1/2023 11:27PM 
 *
 * This ESP32 code is created by kareem Mohamed nabil
 *
 * The Project is a planet monitoring system
 *
 * The Hardware used in this project: ESP32 MC, soil moisture sensor, OLED display, wires and bread board 
 */
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define WIDTH 128
#define HEIGHT 64
#define AOUT_PIN 36 // Ao of sensor (Vp pin in ESP32)

Adafruit_SSD1306 display(WIDTH, HEIGHT, &Wire, -1);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
  {
    Serial.println(F("SSD1306 alocation failed!"));
    for(;;);
    
  }
  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  display.setCursor(1, 10);
  display.print("Starting Program");
  display.display();
  delay(500);
  display.clearDisplay();
  display.setCursor(1, 10);
  display.print("Starting Program.");
  display.display();
  display.clearDisplay();
  display.setCursor(1, 10);
  display.print("Starting Program..");
  display.display();
  delay(500);
  display.clearDisplay();
  display.setCursor(1, 10);
  display.print("Starting Program...");
  display.display();
  delay(500);
  display.clearDisplay();
  display.display();
  display.setCursor(1, 10);
}

void loop() {
  // put your main code here, to run repeatedly:
  int moistLevelAnlg = analogRead(AOUT_PIN); // read the analog value (moisture level) from the sensor
  int moistLevelPrcnt = 100 - (moistLevelAnlg/4095.0)*100;  // converting the reading to be in percentage format
  /////////////////////////////////////
  Serial.print("Sensor reading: ");
  Serial.println(moistLevelAnlg);
  /////////////////////////////////////

  if (moistLevelAnlg >= 3500)
  {
    display.setCursor(1, 10);
    display.print("Implant the sensor in the soil");
    display.display();
    delay(500);
    display.clearDisplay();
    display.display();
    delay(300);
  }

  if (moistLevelAnlg < 1200)
  {
    display.setCursor(1, 10);
    display.print("Humidity = ");
    display.print(moistLevelPrcnt);
    display.print("%");
    display.display();
    delay(800);
    display.clearDisplay();
    display.setCursor(1, 10);
    display.print("Soil is Wet!");
    display.display();
    delay(800);
    display.clearDisplay();
    display.display();
    display.setCursor(1, 10);
  }

  if ((moistLevelAnlg >= 1200) && (moistLevelAnlg <= 1950))
  {
    display.setCursor(1, 10);
    display.print("Humidity = ");
    display.print(moistLevelPrcnt);
    display.print("%");
    display.display();
    delay(800);
    display.clearDisplay();
    display.setCursor(1, 10);
    display.print("Soil is Humid!");
    display.display();
    delay(800);
    display.clearDisplay();
    display.display();
    display.setCursor(1, 10);
  }

  if ((moistLevelAnlg > 1950) && (moistLevelAnlg < 3500))
  {
    display.setCursor(1, 10);
    display.print("Humidity = ");
    display.print(moistLevelPrcnt);
    display.print("%");
    display.display();
    delay(800);
    display.clearDisplay();
    display.setCursor(1, 10);
    display.print("Soil is Dry!");
    display.display();
    delay(800);
    display.clearDisplay();
    display.display();
    display.setCursor(1, 10);
  }

}