//Fish Tank Controller 8-channel relay
//Written by Nativ1Services with help from randonnerdturtorials.com and Gemini

//Libraries
#include <RTClib.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <OneWire.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)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

//Pin Designations
const int Relay1 = 32; 
const int Relay2 = 33;
const int Relay3 = 25;
const int Relay4 = 26;
const int Relay5 = 27;
const int Relay6 = 14;
const int Relay7 = 12;
const int Relay8 = 13; 
const int TempSensor = 4;

// Define Sensor
#define DHTTYPE DHT22

DHT dhtTemperature(TempSensor, DHTTYPE);

// RTC Instance
RTC_DS3231 rtc;

// Global variables
unsigned long startTime = 0;
boolean lightState = false;
boolean fanState = false;
unsigned long fanStartTime = 0; // Variable to track fan start time


void setup() {
  Serial.begin(115200);

  dhtTemperature.begin();

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  delay(2000);
  display.clearDisplay();
  display.setTextColor(WHITE);


  // Initalize Pins
  pinMode(Relay1, OUTPUT);
  pinMode(Relay2, OUTPUT);
  pinMode(Relay3, OUTPUT);
  pinMode(Relay4, OUTPUT);
  pinMode(Relay5, OUTPUT);
  pinMode(Relay6, OUTPUT);
  pinMode(Relay7, OUTPUT);
  pinMode(Relay8, OUTPUT); 

  // Initialize the RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1) {} // Halt if RTC not found
  }

  // Set the current time (optional)
  rtc.adjust(DateTime(2024, 9, 3, 11, 07, 0)); // Replace with desired time
}


void loop() 
{
  delay(5000);

  // Read temperature and humidity
  float tf = dhtTemperature.readTemperature();
  int hf = dhtTemperature.readHumidity(); // Convert humidity to int

  // Convert temperature to Fahrenheit
  float ff = tf * 1.8 + 32;

  if (isnan(ff) || isnan(tf) || isnan(hf)) {
    Serial.println("Failed to read from Temperature sensor!");
  }

  // Get current time
  DateTime now = rtc.now();


 //Controls

  // Relay 1 Control
 if (now.hour() >= 8 &&  now.hour() < 19) 
 {
  digitalWrite(Relay1, HIGH);
  } 
 else 
 {
  digitalWrite(Relay1, LOW);
 } 

  // Relay 2 Control
 if ( now.hour() >= 8 &&  now.hour() < 19) 
 {
  digitalWrite(Relay2, HIGH);
 } else {
  digitalWrite(Relay2, LOW);
 }

  // Relay 3 control
 if ( now.hour() >= 8 &&  now.hour() < 19) 
 {
  digitalWrite(Relay3, HIGH);
 } else {
  digitalWrite(Relay3, LOW);
 }

  // Relay 4 control
 if ( now.hour() >= 8 &&  now.hour() < 19) 
 {
  digitalWrite(Relay4, HIGH);
 } else {
  digitalWrite(Relay4, LOW);
 }

  //Test code for extra pin 13 for Testing
  digitalWrite(Relay8, HIGH);
  delay(2500);
  digitalWrite(Relay8, LOW);
  delay(2500);

 // Clear display
 display.clearDisplay();

 // Display "Nativ 1 Services" and Time
 display.setTextSize(1);
 display.setCursor(0, 0);
 display.print("N1S");

 display.setCursor(67, 0);
 display.print(now.hour() % 12);
 display.print(":");
 display.print(now.minute() < 10 ? "0" : ""); // Print "0" if minutes are less than 10
 display.print(now.minute(), DEC);
 display.print(now.hour() >= 12 ? " PM" : " AM");

  // Display Temperature
 display.setTextSize(1.75);
 display.setCursor(0, 16);
 display.print("Temp: ");
 display.setTextSize(1.75);
 display.setCursor(29, 16);
 display.print(int(ff));
 display.print(" ");
 display.setTextSize(1.75);
 display.cp437(true);
 display.write(167);
 display.setTextSize(1.75);
 display.print("F");

 // Display Humidity
 display.setTextSize(1.75);
 display.setCursor(0, 34);
 display.print("Humidity: ");
 display.setTextSize(1.75);
 display.setCursor(55, 34);
 display.print(hf);
 display.print("%");


 // Print current time to serial monitor
 Serial.print("Temperature: ");
 Serial.print(int(ff)); // Print temperature without decimals
 Serial.println("%");
 Serial.print("   Humidity: ");
 Serial.print(hf);
 Serial.println("%");
}