//
// deeds.ino
//
// a Tangible Time Tracker 
//
// Ahmad Saeed 7/10/20
//
// This work may be reproduced, modified, distributed,
// performed, and displayed for any purpose. Copyright is
// retained and must be preserved. The work is provided
// as is; no warranty is provided, and users accept all 
// liability

#include <rdm6300.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
#define RDM6300_RX_PIN 5
Rdm6300 rdm6300;

String cardID = "0";
bool cardState = 0;

void setup()
{
  Serial.begin(9600);
  rdm6300.begin(RDM6300_RX_PIN);

  lcd.init();
  lcd.init();
  lcd.noBacklight();
  lcd.setCursor(0, 0);
  lcd.print(" ");
}

void loop()
{
  cardState = rdm6300.is_tag_near();
  if (rdm6300.update())
    cardID = String(rdm6300.get_tag_id(), HEX);

  delay(10);

  if (Serial.available() > 0)
  {
    byte msg = Serial.read();
    if (msg == 0x0A) {
      Serial.write(byte(0x0B));
    }
    if (msg == 0x0B) {
      if (cardState == 0) Serial.println("0");
      else Serial.println(cardID);
    }
    if (msg == 0x0C) {
      lcd.noBacklight();
      lcd.setCursor(0, 0);
      lcd.print("                  ");
      lcd.setCursor(0, 1);
      lcd.print("                  ");
    }
    if (msg == 0x0D) {
      lcd.backlight();
      lcd.setCursor(0, 0);
      lcd.print("Waiting 4 deeds.");
      lcd.setCursor(0, 1);
      lcd.print("                  ");
    }
    if (msg == 0x0E) {
      if (cardState != 0) {
        delay(10);
        String x;
        x = Serial.readStringUntil('@');
        lcd.backlight();
        lcd.setCursor(0, 0);
        lcd.print("                  ");
        lcd.setCursor(0, 0);
        lcd.print(x);
      }
    }
    if (msg == 0x0F) {
      if (cardState != 0) {
        delay(10);
        String x;
        x = Serial.readStringUntil('@');
        lcd.setCursor(0, 1);
        lcd.print(x);
      }
    }
  }
}