/*
Fenil Chandarana
Fab Academy 2022
Webpage link: https://fabacademy.org/2022/labs/vigyanashram/students/fenil-chandarana/
*/

#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
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);


#define trigPin 5
#define echoPin 18


int dropLed = 17;
int streamLed = 16;

int streamcount = 0;
int soilmoisturereading = 0;
int watervalue = 0;
int dropcount = 0;
int dropLedstate = 0;
int streamLedstate = 0;

int dropButton =34;
int streamButton = 35;

int dropButtonvar = 0;
int streamButtonvar = 0;






void setup() {
  
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(dropLed, OUTPUT);
  pinMode(streamLed, OUTPUT);

    pinMode(dropButton, INPUT);
  pinMode(streamButton, INPUT);
 


  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(100);

}
void loop() {



  long duration, distance;
  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2); 
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  delay(100);
  
  
  int resetcycle =0;
  for (resetcycle=0; resetcycle<12; resetcycle++){                                    //after which cycle resets
  soilmoisturereading = digitalRead(14);
    dropButtonvar = digitalRead(dropButton);
  streamButtonvar = digitalRead(streamButton);
   
  if (soilmoisturereading==0 && distance>10)                    // value of photoresistor
    {
      if (resetcycle < 10) {                                         // stream , constant power
      watervalue=watervalue+1;
     delay(80);
     if (watervalue > 15)                                           // drop , fluctuating power
      {  dropcount=dropcount+1;
        watervalue = 0;
        break;
        
        }
      }
      else { watervalue = 0;}
                                                                 
    }
if (soilmoisturereading==0 && resetcycle == 10)                            // suppose the value of i is 60 in "if (soilmoisturereading == HIGH && i == 60)". Let say the stream breaks at 20 and resumed at 21 then +1 vill be incremented in stream when the number reaches at m=81. 21+60=81.
    { 
      if(distance >10){                                        // photoresistor
        
      streamcount = streamcount+1;
   
      

      delay (100);
     }
   }
     
      
      if (soilmoisturereading==1 && resetcycle>2)
      {
        
        
        resetcycle = 0;
        delay(100);
        
      }

      Serial.print("watervalue = ");
      Serial.print(watervalue);
      Serial.print(" ");
      Serial.println(resetcycle);
      Serial.print(" ");
      Serial.println(soilmoisturereading);
      Serial.print(" ");
      Serial.println(distance);
      Serial.print(" ");
      Serial.println(streamcount);
      Serial.print(" ");
      Serial.println(dropcount);
      display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);

      display.setCursor(0, 10);

  display.print("Stream:");
  display.setCursor(100, 10);

  display.print(streamcount);
   display.setCursor(0, 40);

  display.print("Drop:");
  display.setCursor(80, 40);

  display.print(dropcount);
  display.display();


      
      if (dropcount == 1)                                             // led for drop , fluctuating power
      {
        dropLedstate = 1;
        }
      if (dropLedstate == HIGH ){
        digitalWrite (dropLed, HIGH);
        dropLedstate = 0;
        
      }

      if (streamcount == 1)                                           // led for stream , constant power
      {
        streamLedstate = 1;
      }
      if (streamLedstate == HIGH )
      {
        digitalWrite (streamLed, HIGH);
        streamLedstate = 0;
       
        }

      if (dropButtonvar == 1){
      digitalWrite (dropLed, LOW);
      dropLedstate = 0;

      }

      if (streamButtonvar == 1){
      digitalWrite (streamLed, LOW);
      streamLedstate = 0;

      }
    
   
  }






  
}