Arduino Code for Heated Hoodie

/*

Right and up turn up the temperature on the Heat pads
Down and left turn it down

Connect the MOSFET to pin 9 on the Arduino

  The circuit:

  SparkFun Keypad                Arduino

  -----------------------------------------

    Wire 1 (NC) ------------- No connection

   Wire 2 (LEDR) ----------------- D3

    Wire 3 (GND) ------------------GND

   Wire 4 (P5.1) ----------------- D5

   Wire 5 (P5.3) ----------------- D6

   Wire 6 (P5.2) ----------------- D7

*/

#include <Time.h>

int LEDpin = 3;
int heatpin = 9;
int p51 = 5;
int p53 = 6;
int p52 = 7;

int button = 0;
int heatlevel = 200;
int ledlevel = 200;
int onstatus = 1;
int heatstatus = 1;
time_t t;
int begin_s = 61;
int end_s = 0;
int prelevel = 200;

void setup()
{

  // Initially set up the pins
  pinMode(LEDpin, OUTPUT);
  pinMode(heatpin, OUTPUT);
  pinMode(p51, INPUT);
  pinMode(p53, INPUT);
  pinMode(p52, INPUT);
  digitalWrite(p51, HIGH);
  digitalWrite(p52, HIGH);
  digitalWrite(p53, HIGH);
  analogWrite(heatpin, heatlevel);
  analogWrite(LEDpin, ledlevel);



  Serial.begin(9600);
}

void loop()
{

  button = getButtonState();  // Get button status

 // timeout LED  so we don't kill the battery
  if(button)
  {  if(begin_s == 61) {t = now(); begin_s = second(t); ledlevel = prelevel;}   }

  if(begin_s != 61)
  {
    t = now();
    end_s = second(t);
    if(end_s >= (begin_s + 20) || (end_s >= (begin_s - 10) && end_s < begin_s))
    { delay(100);prelevel = ledlevel; ledlevel = 0; begin_s = 61; end_s = 0; }
  }

// Serial.println(begin_s);
// Serial.println(end_s);
 //Serial.println(heatlevel);
  // On Off
  if (button == 0x04)
  {
    onstatus = onstatus ^ 1;  // flip on/off status of LED
    delay(10);  // for debouncing try longer if you still have problems
    while (getButtonState() == 0x04) { }
    if(onstatus == 0){ heatstatus = 0;}

  }
  else if (button == 0x02)// Up
  {
    ledlevel = ledlevel + 1;  // Change LED brightness
    heatlevel = heatlevel + 1; // Change heat level
    delay(10);
  }
  else if (button == 0x01)  // Down
  {
    ledlevel = ledlevel - 1;
    heatlevel = heatlevel - 1;
    delay(10);
  }
  else if(button == 0x08)   //Right
  {
      // tried to make different multiplication factors
     // for each button but was acting weird
    ledlevel = ledlevel + 1.25;
    heatlevel = heatlevel + 1.25;
    delay(10);
  }
  else if(button == 0x10) // Left
  {
    ledlevel = ledlevel - 1.25;
    heatlevel = heatlevel - 1.25;
    delay(10);
  }

   // Keep LED and levels in range so we don't
   // have crazy things happen
  if(ledlevel >= 256 || heatlevel >= 256)
  { ledlevel = 255; heatlevel = 255; }


  if(ledlevel <= 0)
  { ledlevel = 0;}

  if(heatlevel <= 0)
  { heatlevel = 0;}





  if(onstatus == 1 )
  {
    analogWrite(LEDpin, ledlevel);
    analogWrite(heatpin, heatlevel);
  }
  else if(onstatus == 0)
  {
    digitalWrite(LEDpin, 0);
  }

  if(heatstatus == 0)
  { digitalWrite(heatpin, 0);}

}

/* getButtonState() will return a uint8_t representing the status

  of the SparkFun button pad. The meaning of the return value is:

  0x01: Down

  0x02: Up

  0x04: Flame

  0x08: Right

  0x10: Left

*/

uint8_t getButtonState()

{

  // Initially set all buttons as inputs, and pull them up
  pinMode(p52, INPUT);
  digitalWrite(p52, HIGH);
  pinMode(p51, INPUT);
  digitalWrite(p51, HIGH);
  pinMode(p53, INPUT);
  digitalWrite(p53, HIGH);


  // Read the d/u/flame buttons

  if(!digitalRead(p53))
  {  return 0x01; } // Down

  if(!digitalRead(p52))
  { return 0x02;  }// Up

  if(!digitalRead(p51))
  { return 0x04;  }// Flame

  // Read right button
  pinMode(p52, OUTPUT);  // set p52 to output, set low
  digitalWrite(p52, LOW);

  if(!digitalRead(p53))
  {  return 0x08;  }// Right

  pinMode(p52, INPUT);  // set p52 back to input and pull-up
  digitalWrite(p52, HIGH);

  // Read left button
  pinMode(p51, OUTPUT);  // Set p51 to output and low
  digitalWrite(p51, LOW);

  if(!digitalRead(p53))
  {  return 0x10; } // Left

  pinMode(p51, INPUT);  // Set p51 back to input and pull-up
  pinMode(p51, HIGH);



  return 0;
}