rdm6300.h

/*
 * A simple library to interface with rdm6300 rfid reader.
 *
 * Arad Eizen (https://github.com/arduino12).
 */

#ifndef _RDM6300_h_
#define _RDM6300_h_

#include <Arduino.h>

#if defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_SAMD)
	#define RDM6300_HARDWARE_SERIAL
#endif

#if !(defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_SAMD))
	#define RDM6300_SOFTWARE_SERIAL
#endif

#ifdef RDM6300_HARDWARE_SERIAL
	#ifdef ARDUINO_ARCH_SAMD
		#include <Uart.h>
		#define HardwareSerial_t Uart
	#else
		#include <HardwareSerial.h>
		#define HardwareSerial_t HardwareSerial
	#endif
#endif
#ifdef RDM6300_SOFTWARE_SERIAL
	#include <SoftwareSerial.h>
#endif

#include <Stream.h>

#define RDM6300_BAUDRATE				(9600)
#define RDM6300_PACKET_SIZE				(14)
#define RDM6300_PACKET_BEGIN			(0x02)
#define RDM6300_PACKET_END				(0x03)
#define RDM6300_DEFAULT_TAG_TIMEOUT_MS	(300)
#define RDM6300_READ_TIMEOUT			(20)

class Rdm6300
{
	public:
		void begin(Stream *stream);
		void begin(int rx_pin, uint8_t uart_nr=1);
		void end(void);
		void set_tag_timeout(uint32_t tag_timeout_ms);
		uint32_t get_tag_id(void);
		uint32_t get_new_tag_id(void);
#ifdef RDM6300_SOFTWARE_SERIAL
		void listen(void);
		bool is_listening(void);
#endif
	private:
		void _update(void);
		uint32_t _read_tag_id(void);
#ifdef RDM6300_HARDWARE_SERIAL
		HardwareSerial_t *_hardware_serial = NULL;
#endif
#ifdef RDM6300_SOFTWARE_SERIAL
		SoftwareSerial *_software_serial = NULL;
#endif
		Stream *_stream = NULL;
		uint32_t _tag_id = 0;
		uint32_t _new_tag_id = 0;
		uint32_t _last_tag_id = 0;
		uint32_t _last_tag_ms = 0;
		uint32_t _tag_timeout_ms = RDM6300_DEFAULT_TAG_TIMEOUT_MS;
};

#endif