// If I use SPI and UART at the same time, it causes a reboot
// https://forum.arduino.cc/t/if-i-use-spi-and-uart-at-the-same-time-it-causes-a-reboot/1416885
// https://www.youtube.com/watch?v=A00CvNi1rzQ
// https://github.com/upiir/arduino_temperature_gauge


#include <SPI.h>
#include <MFRC522.h>
#include <TFT_eSPI.h>
#include <math.h>
#include <TinyGPSPlus.h>

#define SIM800_RX 18  // RX ESP32 -> TX del SIM800
#define SIM800_TX 17  // TX ESP32 -> RX del SIM800

#define NEO6M_RX 41  // RX ESP32 -> TX del SIM800
#define NEO6M_TX 42  // TX ESP32 -> RX del SIM800

#define SS_LECTOR   38
#define RST_LECTOR  4

TinyGPSPlus gps;
MFRC522 rfid(SS_LECTOR, RST_LECTOR);
TFT_eSPI tft = TFT_eSPI();

int year;
byte month, day, hour, minute, second, hundredths;

void setup() {
  Serial.begin(115200);         
  Serial1.begin(9600, SERIAL_8N1, SIM800_RX, SIM800_TX); // UART1 SIM800 RX= 18 TX = 17
  Serial2.begin(9600, SERIAL_8N1, NEO6M_RX, NEO6M_TX); // UART2 for GPS NEO
  delay(1000);  //IF I DONT PUT THIS DELAY, ESP32 WILL CRASH EVERYTIME!!
  SPI.begin(36, 37, 35); // SCK, MISO, MOSI,   //START SPI
  //rfid.PCD_Init();  
  //tft.init(); 
  Serial.println("System Ready");
}

void loop() {

  if (Serial1.available()) {
    char data = Serial1.read();
    Serial.write(data);
  }

  if (Serial.available()) {
    Serial1.write(Serial.read());
  }

  while (Serial2.available() > 0) {
    gps.encode(Serial2.read());
  }
}