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// http://en.wikipedia.org/wiki/KISS_(TNC)#Special_Characters
// http://k4kpk.com/notes-on-aprs-kiss-and-setting-up-a-tnc-x-igate-and-digipeater
#include <stdint.h>
#include <stdlib.h>
#define KISS_H
#define DCD_ON 0x03 // starting decode
#define FEND 0xC0 // frame END
#define FESC 0xDB // frame Escape
#define TFEND 0xDC // Transposed Frame End
#define TFESC 0xDD // Transposed Frame Escape
#define CMD_UNKNOWN 0xFE
#define CMD_DATA 0x00
#define CMD_HARDWARE 0x06
#define HW_RSSI 0x21
#define CMD_ERROR 0x90
#define ERROR_INITRADIO 0x01
#define ERROR_TXFAILED 0x02
#define ERROR_QUEUE_FULL 0x04