//Fish Feeder
//By _Hash_
//Function: Feeds my Fish at a regular interval of 2hrs and also if my Fish swims very close to Feeding spot (cuz its hungry). 
//Add.Function: Also Outputs the exact time it is fed to act as a record/log (with exact time & date)...

//Workings: Feeding spot detected by PIR Motion Sensor & Feeding time is 5 second by Servo Mortor.... 
// When you start simul it feeds the fish for 5 seconds and then output apears again


#include <Wire.h> 
#include <Servo.h>
#include <RTClib.h> // Include RTC library

// Define pins
const int servoPin = 9;
const int pirSensorPin = 8;
const int RTC_ADDR = 0x68; // I2C address for RTC module

// Define variables
Servo myservo;  // Create servo object
int motionDetected = 0;
int feedingInterval = 2 * 60 * 60; // Set feeding interval in seconds (2 hours)
unsigned long lastFeedingTime = 0; // Stores timestamp of the last feeding
RTC_DS1307 RTC; // Create RTC object

void setup() {
  Serial.begin(9600);  // Initialize serial communication
  myservo.attach(servoPin);  // Attach servo motor to pin 9
  pinMode(pirSensorPin, INPUT);  // Set PIR sensor pin as input

  // Initialize RTC
  if (!RTC.begin()) {
    Serial.println("RTC not found.");
    while (1); // Halt if RTC not found
  }
}

void loop() {
  motionDetected = digitalRead(pirSensorPin);  // Read PIR sensor value
  dispenseFood();
  delay(1000);  // Delay for 1 second
}

void readTime() {
  DateTime now = RTC.now();  // Get current date and time
  Serial.print("Current time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.print(now.minute());
  Serial.print(":");
  Serial.println(now.second());
}

void dispenseFood() {
  DateTime now = RTC.now();  // Get current date and time 
  unsigned long currentTime = now.unixtime(); // Get timestamp from RTC in seconds

  // Check if feeding interval has passed and motion is detected 
  if ((currentTime - lastFeedingTime >= feedingInterval) || motionDetected == HIGH) {
    myservo.write(90);  // Open food dispenser 
    delay(5000);  // Dispensing food
    myservo.write(0);  // Close food dispenser 
    lastFeedingTime = currentTime; // Update last feeding time
    Serial.println("Fish fed at:");
    Serial.print(now.hour()); 
    Serial.print(":");
    Serial.print(now.minute());
    Serial.print(":");
    Serial.print(now.second());
    Serial.print("  ");
    Serial.print(now.day());
    Serial.print("/");
    Serial.print(now.month());
    Serial.print("/");
    Serial.print(now.year());
    Serial.println(" for 5s");
  }
}