Arduino_Part

// Import libraries
#include <Arduino.h>
#include <U8x8lib.h>

// Make synonyms using #define.  No semi-colons needed here.
#define MOSFET 2   // The MOSFET driver for the water pump on digital I/O 2
#define REDLED 4   // Big red LED on digital I/O 4
#define BUTTON 6   // Push button on digital I/O 6
#define MOISTURE A1
#define WET_THRESH 600 // below 600 is considered wet 
#define BUZZER 5 // buzzer 

// Creates an instance of the `U8X8_SSD1306_128X64_NONAME_HW_I2C` class
auto display = U8X8_SSD1306_128X64_NONAME_HW_I2C(U8X8_PIN_NONE);

// Set up variable for measuring time.
unsigned long elapsedTime = 0;       // "global" variable as long integer, positive values only.
unsigned long startTime = 0;         // "global" variable as long integer, positive values only.
int moistureValue = 0;


/* -------------- Initialize the Grove board ------------- */
void setup() {
    pinMode(MOSFET, OUTPUT); // Sets the D2 pin (MOSFET + Pump) to output
    pinMode(REDLED, OUTPUT); // Sets the D4 pin (LED) to output
    pinMode(BUTTON, INPUT); // Sets the D6 pin (Button) to input
    digitalWrite(MOSFET, LOW);    // pump off
    Serial.begin(9600);
    display.begin(); // start up the OLED display
    display.setFlipMode(0); // set to 1 or 0, depending on orientation of board
    display.clearDisplay();                     // blank display
    display.setFont(u8x8_font_profont29_2x3_r); // set font

    // Record initial time.
    startTime = millis();
}

void loop(){
  Water();
  Java();
  myfunction();
  sendJava();
  buzzer();


moistureValue = analogRead(MOISTURE);

//place the cursor at positon x = 0 , y= 0 
display.setCursor(0,0);
display.print("A1: " + String(moistureValue));
}

// auto detecting moisture value and water 
void Water(){

if (moistureValue <= WET_THRESH){
  digitalWrite(MOSFET, LOW); // pumpo on  
 
}

 else {
  digitalWrite(MOSFET, HIGH); // pumpo on 
  
 
  
}
}
  
void sendJava(){
   const auto value = analogRead(MOISTURE);
    const byte data[] = {0, 0, highByte(value), lowByte(value)};

    Serial.write(data, 4);
    Serial.println();
}



// turn on the pump using java button 

void Java(){
if (!Serial.available()) {
 return;
 }
 const auto receivedData = Serial.read();
 // format the data
 char buf[16];
 sprintf(buf, "%03d", receivedData);
 
 if(receivedData<100)  {
 digitalWrite(MOSFET,LOW);
 }
 else if (receivedData == 255) 
 {
 digitalWrite(MOSFET,HIGH);
 delay(2000);
 }
 else {
 digitalWrite(MOSFET,LOW);
 }
  
}
void myfunction(){
  if(!Serial.available()){
    return;
  }
  const auto receivedData = Serial.read();
  char buf[16];
 sprintf(buf, "%03d", receivedData);
  
 if(receivedData<100)  {
 digitalWrite(MOSFET,LOW);
 }
 else if (receivedData == 255) 
 {
 digitalWrite(MOSFET,HIGH);
 delay(2000);
 }
 else {
 digitalWrite(MOSFET,LOW);
 }
  
}


void buzzer(){  // buzzer on for certain value proportional to the slider values
  if (!Serial.available()) {
 return;}
 const auto sliderData = Serial.read();
 char buf [16];
 sprintf(buf, "%03d", sliderData);
 if(sliderData > 100){
 analogWrite(BUZZER,HIGH);

  // put your main code here, to run repeatedly:

}
}