AGRI AQUA GENESIS CODE-1

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>

// Define sensor pins
#define PH_SENSOR A0        // pH sensor connected to Analog pin
#define TEMP_SENSOR D4       // DS18B20 temperature sensor
#define WATER_LEVEL_SENSOR D5 // Water level sensor
#define RELAY_PUMP D6        // Relay for water/nutrient pump
#define RELAY_VALVE D7       // Relay for solenoid valve

// OLED Display setup
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// OneWire setup for DS18B20 temperature sensor
OneWire oneWire(TEMP_SENSOR);
DallasTemperature sensors(&oneWire);

void setup() {
    Serial.begin(115200);
    pinMode(PH_SENSOR, INPUT);
    pinMode(WATER_LEVEL_SENSOR, INPUT);
    pinMode(RELAY_PUMP, OUTPUT);
    pinMode(RELAY_VALVE, OUTPUT);
    
    // Initialize OLED display
    if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
        Serial.println("SSD1306 allocation failed");
        for(;;);
    }
    display.clearDisplay();
    
    // Initialize temperature sensor
    sensors.begin();
}

void loop() {
    // Read pH Sensor
    int phValue = analogRead(PH_SENSOR);
    float ph = (phValue * 14.0) / 1024.0; // Convert to pH scale

    // Read Water Level Sensor
    int waterLevel = digitalRead(WATER_LEVEL_SENSOR);

    // Read Temperature Sensor
    sensors.requestTemperatures();
    float temperature = sensors.getTempCByIndex(0);

    // Display Data on OLED
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0,0);
    display.println("Hydroponics System");
    display.print("pH: "); display.println(ph);
    display.print("Temp: "); display.print(temperature); display.println(" C");
    display.print("Water Level: "); display.println(waterLevel == HIGH ? "Full" : "Low");
    display.display();

    // Automated Control Logic
    if (ph < 5.5) {
        digitalWrite(RELAY_VALVE, HIGH);  // Open solenoid valve to add alkaline solution
        Serial.println("Adjusting pH: Adding Alkaline Solution");
    } else {
        digitalWrite(RELAY_VALVE, LOW);
    }

    if (waterLevel == LOW) {
        digitalWrite(RELAY_PUMP, HIGH);  // Activate pump to refill water
        Serial.println("Water Level Low: Pump Activated");
    } else {
        digitalWrite(RELAY_PUMP, LOW);
    }

    delay(5000); // Update every 5 seconds
}