/* 
--------------------------------------------  
-------- Begin Initialise Variables --------
--------------------------------------------
*/

//STAGE #1
//define pins
int Hall = A0;
int Tran = 2;
int Sole = 4;
float Pendulum = 0.30;

//Sensor readings



/*--------------------------------------------  
-------- End Initialise Variables ----------
--------------------------------------------
*/


/* 
----------------------------------  
-------- Begin Setup Loop --------
----------------------------------
*/

void setup() 
{

  // initialize serial communication at 115200 bits per second.
  Serial.begin(9600);

  //STAGE 2 - pin modes
  pinMode(Hall, INPUT);
  pinMode(Sole, OUTPUT);
  
  //Control solenoid
  digitalWrite(Sole, LOW);
  digitalWrite(Sole, HIGH);
  delay(1000);
 
}

/* 
-------------------------------
------- End Setup Loop --------
-------------------------------
*/

/* 
----------------------------------  
-------- Begin Main Loop ---------
----------------------------------
*/ 

  //STAGE 3 - the main loop
void loop() 
{
  // variables for timing
  unsigned long startTime = 0;
  unsigned long currentTime;
  unsigned long elapsedTime;
  int HallValue;

  //get start time
  Serial.print(startTime);

  do  {
    
     //read Hall effects sensor
     HallValue = analogRead(Hall);


     //get current time
     currentTime = millis();

     //calc elapsed time in milliseconds
     unsigned long elapsedTime(unsigned long currentTime) {
      float a = 1.1;
      return (currentTime - a);
     }
	
	 //Print data back to the computer
	 Serial.print(elapsedTime);
   Serial.print(",");
   Serial.print(HallValue);
   Serial.print("\n");
	
  } while (elapsedTime >= 10000);

  
  //STAGE 5 - calculate Gravity...
  //average_period = something here;
  if ( (A >= value_X) && (B < value_Y) ) {

  //evaluate gravity
  //g = your calculation here: use the sq() and PI

  //STAGE 5b - print your answer...
  Serial.print("gravity = ");
  
  
  delay(10000); //wait for 10 seconds - LEAVE THIS FOR RELOAD TO WORK PROPERLY!
}

/* 
----------------------------------  
--------- End Main Loop ----------
----------------------------------
*/