#include <SoftwareSerial.h>

#define RX    1   // SCK i reversed them to read and debug
#define TX    2   //  MISO
SoftwareSerial Serial(RX, TX);

const int PTPin = 3;    // pin that the sensor is attached to
const int laser = 4;       // pin that the LED is attached to
int capCount = 0;          //total count of cap, init zero
bool currentState = 1; // to store new state after cap pass
int countTrigger = 25;  //value the PT exceeds to count cap
int resetTrigger = 10; //value at which to start counting again
int val=0;
void setup() {
pinMode(PTPin, INPUT);
pinMode(laser, OUTPUT);
digitalWrite(laser, HIGH);
Serial.begin(9600);
Serial.println("HELLO");

}

void loop() {
//   if (Serial.available()) {
//     char MasterCommand = Serial.read();
//     if(MasterCommand == 'O') {
//      Serial.println('R');
//      checkInput(); //reads the PT and counts 
//     } 
//  }
//val = analogRead(PTPin);
//Serial.println(val);
checkInput(); //reads the PT and counts
}

void checkInput() {
  int PTValue = 0;
  for(int i = 0; i<5; i++){       // for accuracy taking 5 readings and averaging
    PTValue += analogRead(PTPin);
  }
  PTValue= PTValue / 5;
  //Serial.println(PTValue);

  if (currentState == 1) //actively looking for cap
  { if (PTValue >= countTrigger){ //if PT goes above trigger cap is detected
    currentState = 0; //stop listening for new counts until it gets bright again
    capCount++; //increment the count
    Serial.println(capCount);
    }
  }

 else //currentstate was false, don't check for cap, check for reset
  {
    if (PTValue <= resetTrigger){ //if value was below the reset threshhold
     currentState = 1; //start listening again
    }
   }
   if (capCount == 5){
     capCount = 0;
     Serial.println('F');
   }
   checkInput();
}