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	- Project: "Buzzer Relay"
	- Source Code NOT compiled for: Arduino Nano ESP32
	- Source Code created on: 2024-06-14 16:51:43

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* This code will program an arduino nano to */
	/* communicate and operate my cube hopper mk2 via */
	/* rs232 so that when  an icp pa7 bill acceptor take */
	/* a dollor it gives out 4 quarters  every time a */
	/* dollar is accepted turn on buzzer for 500ms */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include   // https://github.com/ArduinoGetStarted/buzzer
#include      // https://github.com/rafaelnsantos/Relay
#include  // For RS232 communication

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);
void checkBillAcceptor(void);

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t buzz1_PassiveBuzzer_Signal_PIN_D2 = 2;
const uint8_t myRelayModule_RelayModule_Signal_PIN_D3 = 3;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool buzz1_PassiveBuzzer_Signal_PIN_D2_rawData = 0;
bool myRelayModule_RelayModule_Signal_PIN_D3_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float buzz1_PassiveBuzzer_Signal_PIN_D2_phyData = 0.0;
float myRelayModule_RelayModule_Signal_PIN_D3_phyData = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
ezBuzzer buzzer(buzz1_PassiveBuzzer_Signal_PIN_D2);  // Initialize ezBuzzer object with the pin
Relay myRelay(myRelayModule_RelayModule_Signal_PIN_D3, true); // Initialize Relay object with the pin and Normally Open configuration

void setup(void) {
  // put your setup code here, to run once:
  Serial.begin(9600); // Initialize RS232 communication
  pinMode(buzz1_PassiveBuzzer_Signal_PIN_D2, OUTPUT);
  myRelay.begin(); // Initialize the relay pin
}

void loop(void) {
  // put your main code here, to run repeatedly:
  buzzer.loop();  // Call the buzzer.loop() function in loop()
  checkBillAcceptor(); // Check if a dollar is accepted
  updateOutputs();  // Refresh output data
}

void updateOutputs() {
  digitalWrite(buzz1_PassiveBuzzer_Signal_PIN_D2, buzz1_PassiveBuzzer_Signal_PIN_D2_rawData);
  if (myRelayModule_RelayModule_Signal_PIN_D3_rawData) {
    myRelay.turnOn();  // Turn relay on
  } else {
    myRelay.turnOff(); // Turn relay off
  }
}

void checkBillAcceptor() {
  if (Serial.available() > 0) {
    int receivedByte = Serial.read();
    // Assuming the bill acceptor sends a specific byte when a dollar is accepted
    if (receivedByte == 'D') { // Replace 'D' with the actual byte sent by the bill acceptor
      // Dollar accepted
      buzzer.beep(500); // Turn on buzzer for 500ms
      for (int i = 0; i < 4; i++) {
        myRelay.turnOn();  // Turn relay on to dispense a quarter
        delay(250);        // Adjust delay as needed for the dispensing mechanism
        myRelay.turnOff(); // Turn relay off
        delay(250);        // Adjust delay as needed for the dispensing mechanism
      }
    }
  }
}

/* END CODE */