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


#define OLED_RESET 4
#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     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

//Adafruit_SSD1306 display(OLED_RESET);

long duration, inches;
int set_val,percentage;
bool state1,pump1;
bool state2,pump2;






void setup() 
{


  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1.5);
  display.setTextColor(WHITE);
  
  // Tank Pump:------------------------------------------------------------------------
  display.setCursor(0,30);
  display.print("Water Level:");
  display.setCursor(0, 40); 
  display.print("T.Pump Mode:");
  display.setCursor(0, 50); 
  display.print("T.Pump State:");
  display.display();
  
  // Solar Pump:---------------------------------------------------------------------
  display.setCursor(0,0);
  display.print("Solar Pump:");
  display.setCursor(0, 10); 
  display.print("S.Pump Mode:");
  display.display();
  //-----------------------------------------------------------------------------------


  // Tank Pump Pinout:-------------------------------------------------------------------
  pinMode(2, OUTPUT);
  pinMode(3, INPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(12, OUTPUT);
  //--------------------------------------------------------------------------------------
  
  // Solar pump pinout:
  pinMode(6, INPUT);
  pinMode(9, INPUT_PULLUP);
  pinMode(8, INPUT_PULLUP);
   pinMode(7, OUTPUT);
   //--------------------------------------------------------------------------------------
  
   set_val=EEPROM.read(0);
   if(set_val>20)set_val=20 ; // set_val to 150 when use at 400cm distance


}

void loop() 
{
  
  Tank_Pump_Control();
  Solar_Pump_Control();



}

long microsecondsToInches(long microseconds) {
   return microseconds / 29 / 2; //  replace 29 with 74 when used at distance of 400cm.
}


void Tank_Pump_Control(){


  digitalWrite(2, HIGH);
   delayMicroseconds(10);
   digitalWrite(2, LOW);
   duration = pulseIn(3, HIGH);
   inches = microsecondsToInches(duration);
   
   percentage=(set_val-inches)*110/set_val;
   
   display.setCursor(85, 30); 
   if(percentage<0)percentage=0;
   display.print(percentage);
   display.println("%   ");
   display.display();

   if(percentage<30&digitalRead(11))pump1=1;
   if(percentage>85)pump1=0;
   digitalWrite(12, pump1); // by adding !pump, the value is inverted in case a relay with low trigger is used
     
   display.setCursor(85, 50);
   //display.setTextColor(WHITE, BLACK);
   if(pump1==1)display.println("ON ");
   else if(pump1==0) display.println("OFF");
    display.display();

   display.setCursor(85, 40);
   display.setTextColor(WHITE, BLACK);
   
   if(!digitalRead(11))display.print("MANUAL ");
    else display.print("AUTO   "); 

   //display.setCursor(0, 50);
   //display.setTextColor(WHITE, BLACK);

   display.display();




    if(!digitalRead(10)&!state1&digitalRead(11)){
      state1=1;
      set_val=inches;
      EEPROM.write(0, set_val);
      }
      
     if(!digitalRead(10)&!state1&!digitalRead(11)){
        state1=1;
        pump1=!pump1;
     
      }
      
    if(digitalRead(10))state1=0;
      
    
   delay(100);

}

void Solar_Pump_Control(){

   if(digitalRead(6)&digitalRead(9))pump2=1;
   if(!digitalRead(6))pump2=0;
   digitalWrite(7, pump2); // by adding !pump, the value is inverted in case a relay with low trigger is used
     
   display.setCursor(85, 0);
   //display.setTextColor(WHITE, BLACK);
   if(pump2==1)display.println("ON ");
   else if(pump2==0) display.println("OFF");
    display.display();

   display.setCursor(85, 10);
   //display.setTextColor(WHITE, BLACK);
   
   if(!digitalRead(9))display.print("MANUAL ");
    else display.print("AUTO   "); 

   display.display();




    if(!digitalRead(8)&!state2&digitalRead(9)){
      state2=1;
      //set_val=inches;
      //EEPROM.write(0, set_val);
      }
      
     if(!digitalRead(8)&!state2&!digitalRead(9)){
        state2=1;
        pump2=!pump2;
     
      }
      
    if(digitalRead(8))state2=0;
      
    
   delay(100);

}