tinance2-doorlock-controller/src/main.cpp

#include "main.h" 

volatile uint64_t cardData = 0;
volatile bool newDataAvailable = false;
unsigned long lastDataTime = 0;
const unsigned long displayDelay = 1000; // Delay in milliseconds after which the data is displayed
unsigned int bitCount = 0; // Variable to keep track of the bit count
unsigned int  maxReaderWaitTime = 9000; // Variable to timeout reader after too long of no data.







void handleInterrupt(int bitValue) {
  static unsigned long lastInterruptTime = 0;
  unsigned long interruptTime = micros();

  if (interruptTime - lastInterruptTime > 200) {
    cardData <<= 1;
    cardData |= bitValue;
    newDataAvailable = true;
    bitCount++; // Increment the bit count
  }

  lastInterruptTime = interruptTime;
  lastDataTime = millis(); // Update the time of last received data
}

void handleData0Interrupt() {
  handleInterrupt(0);
}

void handleData1Interrupt() {
  handleInterrupt(1);
}



void setup() {

  Serial.begin(9600);


  pinMode(DATA0_PIN, INPUT_PULLUP);
  pinMode(DATA1_PIN, INPUT_PULLUP);

  #ifdef LEDCTL_PIN
    pinMode(LEDCTL_PIN, OUTPUT);
  #endif

  #ifdef RELAY1
    pinMode(RELAY1_PIN, OUTPUT);
  #endif

  attachInterrupt(digitalPinToInterrupt(DATA0_PIN), handleData0Interrupt, FALLING);
  attachInterrupt(digitalPinToInterrupt(DATA1_PIN), handleData1Interrupt, FALLING);

  #ifdef RELAY1
    Serial.println("Enabling Relay: Locking Door");
    lockDoor();
  #endif

  #ifdef RELAY2
    pinMode(RELAY2_PIN, OUTPUT);
  #endif 

  #ifdef BUZZER
    pinMode(ALARM_PIN, OUTPUT);
    digitalWrite(ALARM_PIN, HIGH); // Do not set to low or it will constantly beep.
  #endif


}



void loop() {
  // Check if new data is available

  if (newDataAvailable) {
    newDataAvailable = false;
    lastDataTime = millis(); // Reset the time of last received data
  }

  if (millis() - lastDataTime >= displayDelay && cardData != 0) {
    

    uint64_t facilityID = (cardData >> 17) & 0xFFFF;
    uint64_t cardID = (cardData >> 1) & 0xFFFF;

    #ifdef DEBUG
      Serial.print("Facility ID (Decimal): ");
      Serial.println(facilityID);
      Serial.print("Facility ID (Binary): ");
      Serial.println(facilityID, BIN);

      Serial.print("Card ID (Decimal): ");
      Serial.println(cardID);
      Serial.print("Card ID (Binary): ");
      Serial.println(cardID, BIN);

      Serial.print("Card Data (Binary): ");
      Serial.println(cardData, BIN);
      Serial.print("Total Bits Received: ");
      Serial.println(bitCount);
    #endif

    String fullCardID = String(facilityID)+":"+String(cardID);
    Serial.print("FULL-CARD-ID: ");
    Serial.println(fullCardID);


    cardData = 0; // Reset the card data
    lastDataTime = millis(); // Reset the time of last received data
    bitCount = 0; // Reset the bit count

  } 
  else if (millis() - lastDataTime >= maxReaderWaitTime) {
    cardData = 0; // Reset the card data
    lastDataTime = millis(); // Reset the time of last received data
    bitCount = 0; // Reset the bit count

  }
}