//Irrigation 
//version 1.2
//by tmade

#include <SPI.h>
#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

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
//Adafruit_SSD1306 display(-1);

//variables
int SLEEP = 1;
const int DRY = 694;
const int WET = 344;
int sensorValue = 0;
int rectangle = 0;
const int X = 10;
const int Y = 1;
const int WIDTH = 35;
const int HEIGHT = 63;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  //to debug set to 115200 !!
  //Serial.begin(115200);
  
  digitalWrite(0, 1);
  pinMode (2, OUTPUT);
  digitalWrite(2, 1);

  // initialize with the I2C addr 0x3C
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  

  // Clear the buffer.
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  //Define the position where the text starts using the setCursor(x,y) method
  display.setCursor(0,20);
  display.println("Startup..");
  display.display();
  delay(4000);
}

void loop() {
  // put your main code here, to run repeatedly:
  display.clearDisplay();
  
  int sensorValue=analogRead(A0);
  int val = analogRead(0);
  val = map(val, DRY, WET, 0, 100);
  delay(200);
  int rectangle = analogRead(0);
  rectangle = map(rectangle, DRY, WET, 1, 63);
  delay(200);

// debugging & examples
/*
  Serial.print("rectanglevalue: ");
  Serial.println(rectangle);

  analogWrite(9, val);

  Serial.print("Dry: ");
  Serial.println(WET);
  Serial.print("Wet: ");
  Serial.println(WET);
  delay(200);
*/  

  SLEEP = SLEEP-1;
  if ((sensorValue > 570) && (SLEEP < 2)) 
  {
    display.clearDisplay();
    // drawRect(x, y, width, height, color)
    display.drawRoundRect(X, Y, WIDTH, HEIGHT, 2, WHITE);
    display.fillRoundRect(X, Y, WIDTH, rectangle, 2, WHITE);
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(60,5);
    display.println("dry!");
    display.setCursor(60,25);
    display.setTextSize(2);
    display.println(sensorValue);
    display.setCursor(60,45);
    display.setTextSize(2);
    display.print(val);
    display.println(" %");
    // write the buffer to the display
    display.display();
    delay(200);

    Serial.print("sensorValue: ");
    Serial.println(sensorValue);
    
    Serial.println("Pump On");
    // 0 = LOW = ON
    digitalWrite(2,0); 
    //set pump duration per loop in milliseconds
    delay(5000);
    // 1 = HIGH = OFF
    digitalWrite(2,1);  
    Serial.println("Pump Off");
    delay(200);
    //set wait until next check
    SLEEP = 60;
  }

   else if (sensorValue < 571)
  {
    Serial.print("sensorValue: ");
    Serial.println(sensorValue);
    Serial.print("humidity: ");
    Serial.print(val);
    Serial.println(" %");
    Serial.println("Sensor is wet");
    delay(1000);
    // Display
    display.clearDisplay();
    // drawRect(x, y, width, height, color)
    display.drawRoundRect(X, Y, WIDTH, HEIGHT, 2, WHITE);
    display.fillRoundRect(X, Y, WIDTH, rectangle, 2, WHITE);
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(60,5);
    display.println("wet!");
    display.setCursor(60,25);
    display.setTextSize(2);
    display.println(sensorValue);
    display.setCursor(60,45);
    display.setTextSize(2);
    display.print(val);
    display.println(" %");
    // write the buffer to the display
    display.display();
    delay(1000);
  }

  else if (SLEEP > 2) 
  {
    display.clearDisplay();
    // drawRect(x, y, width, height, color)
    display.drawRoundRect(X, Y, WIDTH, HEIGHT, 2, WHITE);
    display.fillRoundRect(X, Y, WIDTH, rectangle, 2, WHITE);
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(60,5);
    display.println("dry!");
    display.setCursor(60,25);
    display.setTextSize(2);
    display.println(sensorValue);
    display.setCursor(60,45);
    display.setTextSize(2);
    display.print(val);
    display.println(" %");
    // write the buffer to the display
    display.display();
    delay(200);

    Serial.print("sensorValue: ");
    Serial.println(sensorValue);
    Serial.print("humidity: ");
    Serial.print(val);
    Serial.println(" %");
    Serial.println("Sensor is dry");
    Serial.print("wait another: ");
    Serial.print(SLEEP); 
    Serial.println(" seconds");  
    delay(200);
  }
}