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Topic: RFID based Water ATM project (Read 782 times) previous topic - next topic

NomanAhmed

hey there i am working on this project initiated by an NGO here to supply drinking water to poor people and avoid wastage of water. the theory is when an registered RFID is detected arduino asks for pressing green button, it opens the valve and keeps it open till red button is pressed. but the problem is after the red button has been pressed the code should restart but my code just stuck there...and manually reset is required which i don't want please let me know if there is a bug in the code. the code is attached with the post.

AWOL

No need to attach such a short sketch, just post it.
I auto-formatted it first.
Code: [Select]
#include <SoftwareSerial.h>
SoftwareSerial id20(3,9);

////////////////////////////////////////

String  customer1 = "66006BF25AA5";
String  customer2 = "66006BFE51A2";
String  customer3 = "66006C0CDFD9";
String  customer4 = "66006BF5FB03";
String  customer5 = "66006BF96793";

/////////////////////////////////////////

String testCard;
char testtag[12];
int indexnumber = 0;
char tagChar;


/////////////////////////////////////////

int counter = 0;                               
int hallsensor = 9;   
volatile int NbTopsFan = 0;


////////////////////////////////////////

boolean redButton = 6;
boolean greenLed = 7;
boolean greenButton = 8;
boolean redLed = 5;
boolean valve = 4;

////////////////////////////////////////

void setup()
{
  Serial.begin(9600);
  id20.begin(9600);
  attachInterrupt(0, rpm, RISING);

  // inputs

  pinMode(hallsensor,INPUT);
  pinMode(redButton,INPUT);
  pinMode(greenButton,INPUT);

  // outputs 

  pinMode(redLed,OUTPUT);
  pinMode(greenLed,OUTPUT);
  pinMode(valve,OUTPUT);

  // initialization

  digitalWrite(redLed, LOW);
  digitalWrite(greenLed, LOW);
  digitalWrite(valve, LOW);
}

////////////////////////////////////////

void approved()
{
  digitalWrite(redLed, LOW);
  digitalWrite(greenLed, HIGH);
  Serial.println("Card approved");
  Serial.println("your card number is ");
  Serial.println(testCard);
  delay(1000);
  digitalWrite(greenLed, LOW);

  Serial.println("press the green button");

  stopUntill(); //wait for green signal

    digitalWrite(valve, HIGH);
  digitalWrite(greenLed, HIGH);

  isr();

  stopAll();

}

//////////////////////////////////////////////////

void stopAll()
{
  digitalWrite(valve, LOW);
  digitalWrite(greenLed, LOW);
  digitalWrite(redLed, HIGH);
  delay(400);
  digitalWrite(greenLed, LOW);
  NbTopsFan=0;
}
//////////////////////////////////////////////////
void stopUntill()
{

  while(digitalRead(greenButton) == LOW)
  {
    delay(300);
  }

}

/////////////////////////////////////////////

void(* resetFunc) (void) = 0; //declare reset function @ address 0

//////////////////////////////////////////////////

void isr()
{
  delay(50);
  while(digitalRead(redButton)==LOW)
  {
    NbTopsFan = 0; //Set NbTops to 0 ready for calculations
    interrupts(); //Enables interrupts
    delay (1000); //Wait 1 second

    Serial.print (NbTopsFan);
    Serial.println("  NbTopsFan");

    noInterrupts(); //Disable interrupts

      Serial.print (NbTopsFan);
    Serial.println("  NbTopsFan");

    counter=counter+NbTopsFan;


    Serial.print(counter);
    Serial.println ("  ticks");

  }
  resetFunc();  //call reset
}
/////////////////////////////////////////////


void notApproved()
{
  digitalWrite(redLed, LOW);
  Serial.println("Card not Approved");
  digitalWrite(valve, LOW);
  delay(500);
  digitalWrite(redLed, HIGH);
  delay(1000);
  digitalWrite(redLed, LOW);
}

/////////////////////////////////////////////////
void rpm ()     
{
  NbTopsFan++;
}
////////////////////////////////////////////////

void readTag()
{
  tagChar = id20.read();
  if (indexnumber != 0) // never a zero in tag number
  {
    testtag[indexnumber - 1] = tagChar;
  }
  indexnumber++;

  if (indexnumber == 13 ) // end of tag number
  {
    indexnumber = 0;
    testCard = String(testtag);
    if (testCard.equals(customer1))
    {
      approved();
    }

    if (testCard.equals(customer2))
    {
      approved();
    }

    if (testCard.equals(customer3))
    {
      approved();
    }

    if (testCard.equals(customer4))
    {
      approved();
    }
    if (testCard.equals(customer5))
    {
      approved();
    }
    else
      notApproved();
  }
}
/////////////////////////////////////////////////
void loop()
{
  readTag();

}

"Pete, it's a fool (who) looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.
I speak for myself, not Arduino.

billhowl

the "reset function at 0" certainly starts the code back at the very beginning, but it doesn't reset any of the things that are reset by a power-on...

http://forum.arduino.cc/index.php/topic,12874.0.html

And if you read the rest of that thread you'd see why jumping to address 0 is not really a reset and not recommended.

All that does is start the code over, it doesn't reset the chip - an important distinction.

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