Proximity help?

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14

Could be the code is not 26 bits. Try this version:

volatile unsigned long tagID = 0;
volatile unsigned long lastBitArrivalTime;
volatile int bitCount = 0;

void ISRone(void)
{
  lastBitArrivalTime = millis();
  bitCount++;
  tagID <<= 1;
  tagID |= 1;
}

void ISRzero(void)
{
  lastBitArrivalTime = millis();
  bitCount++;
  tagID <<= 1;
}

void setup()
{
  Serial.begin(57600);

  pinMode(2, INPUT);
  digitalWrite(2, HIGH);  // Enable pull-up resistor
  attachInterrupt(0, ISRzero, FALLING);

  pinMode(3, INPUT);
  digitalWrite(3, HIGH);  // Enable pull-up resistor
  attachInterrupt(1, ISRone,  FALLING);

  tagID = 0;
  bitCount = 0;
}

void loop()
{
  //  See if it has been more than 1/4 second since the last bit arrived
  if(bitCount > 0 && millis() - lastBitArrivalTime >  250)
    {
    Serial.print(bitCount, DEC);
    Serial.print(" bits: ");
    Serial.println(tagID, HEX);
    tagID = 0;
    bitCount = 0;
  }
}