/*
  Automated Fish Feeder:
 
  This Program will give you a temperature based feed controller. See Read me in download file for more info.
  4/8/2015 Michael Ratcliffe
 
 
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see .

*/

//************************** Libraries Needed To Compile The Script [See Read me In Download] ***************//

#include <OneWire.h> // We Need This Libaray To Read The Temperature Sensor, SEE READ ME In Downloaded Zip If You Dont Know how To install This

#include <DallasTemperature.h>

//************** User Defined Variables *******************************//

/*
Alter your variables by changinf the numbers below, they only aceept whole numbers

*/

long feedSpacing =60; //the time between feeds in mnuits

const int FeedsPerDay =24;  //Change this only is you change the feeding interval or total number of feeds a day

long MinWeight =5; //Minimum Weight [Kg] Of Fish You Want The Potentiometer To Represent

long  MaxWeight =20;//Maximum Wight [Kg] Of Fish You Want The Potentiometer To Represent

const int FeedRate=8.3; // g/s How Much Feed in Grams Your Feeder Dispnces In A Second [You need to Work This out]

int PercentTenC =3; //percent of Body weight to feed fish daily at 10*C

int PercenTwentSixC=12;//Percent of Body weight to feed fish daily at 26*C

int  MaxFeedPercent=16;

int MinFeedPercent=1;  //InCase The Sensor Breaks, We Will StillFeed Them a Minimum Amount

// The Ones Below Should Be ok as they are, unless your Relay uses pull Low Triggers

const int  OFF=1;

const int ON=0;

//****************** End Of User Variables ***************************//

//************ ONLY Cange These Values Below If You Have Wired To different Pins *****///

const int Potentiometer = A5;  // Analog input pin that the potentiometer is attached to

const int ButtonPin =A4;  //Button Connected to Pin A4

const int Motor = A3;  // Pin That Relay Triger wire is connected to

const int TempProbeNegative=8;  //Temp Probe Negative connected to pin 8

const int TempProbePossitive =9;  //Temp Probe power connected to pin 9

#define ONE_WIRE_BUS 10  // Data wire For Temp Probe is plugged into pin 10 on the Arduino

//************* End Of Pin Selection ********************************//

int ResistorValue = 0;  // value read from the pot

int outputValue = 0;  // value output to the PWM (analog out) 

int Button =1;

float FeedLength =0;

float Temperature=10;

long FishWeight = 1;

long  feedSpacingMillis =0;

long FeedPercent =1;

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)

OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.

DallasTemperature sensors(&oneWire);

//******************************* Setus up Things, This Loop Runs Once at Startup ***************************//

void setup() {

  Serial.begin(9600);

  pinMode(Motor, OUTPUT);

digitalWrite(Motor,OFF);

  pinMode(Potentiometer, INPUT);

  pinMode(ButtonPin, INPUT_PULLUP);

  pinMode(TempProbeNegative , OUTPUT );

  digitalWrite(TempProbeNegative , LOW );

  pinMode(TempProbePossitive , OUTPUT );

  digitalWrite(TempProbePossitive , LOW );

  delay(100);// gives sensor time to settle

  sensors.begin();

  feedSpacing=feedSpacing*60000; //Converts from minutes to milli seconds

  //************************************* Runs a Tester If You Hold the Feed Button When You Turns Power Switch On*************//

  GetReadings();

  if(Button==0){

  digitalWrite(Motor,ON);

  delay(FeedLength*1000);

  digitalWrite(Motor,OFF);

  delay(5000);

  };

};

//*******************************Main Loop [This Once Loops indefinatly ***************************************//

void loop() {

  GetReadings();

//*************** Checks if it is Time to Start The Feeder and delays to stop entering the loop twice *************************************************// 

  if( (millis()%feedSpacing<=1000  &&millis()>=1010)) {  //

  delay(1000); //stoprs multiple eneies into the loop

  digitalWrite(Motor,ON);

  delay(FeedLength*1000);

  digitalWrite(Motor,OFF);

  };

//************** Allows the Button To operate the feeder Only While Pressed ****************************//

  if (Button==0){

  digitalWrite(Motor,ON);  //Turns the Motor on

  }

  else {

  digitalWrite(Motor,OFF);

  };

//**************************** Makes The code Hang Here While The Sensors Settle ********************// 

delay(200);

PrintResults();

};

  //************************ Reads The Sensors and Calcalates the Feed Length ***********************************// 

  void GetReadings() {

  Button=digitalRead(ButtonPin);  //Reads The Button To Check If It Is Pressed

  ResistorValue = analogRead(Potentiometer);  //Checks what possition the potentiometer is at 

  sensors.requestTemperatures();  // Send the command to get temperatures

  Temperature=sensors.getTempCByIndex(0);

  Temperature=Temperature*100;  //easiest way to get

  //************ Turns Those Readings Into Something Useful [Optimum Feed Length ******************************// 

  FishWeight = map(ResistorValue,0,1023, MinWeight*1000, MaxWeight*1000);  //Turns The Potentiometer Reading Into Something Usefull);

  FeedPercent=map(Temperature,1000,2600,PercentTenC*100,PercenTwentSixC*100);

  if (FeedPercent >= (MaxFeedPercent*100)){

  FeedPercent= (MaxFeedPercent*100);

  }

  if (FeedPercent<= (MinFeedPercent*100)){

  FeedPercent=(MinFeedPercent*100);

  };

  FeedLength =((FeedPercent*FishWeight)/(FeedRate*FeedsPerDay));

  FeedLength = FeedLength/10000;

  };

//*************************** Prints The Variables To The Computer ************************************// 

void PrintResults(){

  Serial.print(" Water Temperature: ");

  Serial.print(Temperature/100 );

  Serial.println("*C");

  Serial.print(" User Has Selected: ");

  Serial.print(FishWeight/1000);

  Serial.println(" Kg of Fish");

  Serial.print(" Feed: ");

  Serial.print(FeedLength*FeedRate);

  //Serial.print(FeedLength);

  Serial.print(" Grams of food Every: ");

  Serial.print(feedSpacing/60000);

  Serial.println(" minute");   

};

int PercentTenC =3; //percent of Body weight to feed fish daily at 10*C

int PercenTwentSixC=12;//Percent of Body weight to feed fish daily at 26*C