packet	"~ABCDÍÒ~"	char
			[0]	126 '~'	char
			[1]	65 'A'	char
			[2]	66 'B'	char
			[3]	67 'C'	char
			[4]	68 'D'	char
			[5]	205 / 205	char
			[6]	210 / 210	char
			[7]	126 '~'	char

#include "Arduhdlc.h"
#define MAX_HDLC_FRAME_LENGTH 32
/* Function to send out byte/char */
void send_character(uint8_t data);

/* Function to handle a valid HDLC frame */
void hdlc_frame_handler(const uint8_t *data, uint16_t length);

/* Initialize Arduhdlc library with three parameters.
1. Character send function, to send out HDLC frame one byte at a time.
2. HDLC frame handler function for received frame.
3. Length of the longest frame used, to allocate buffer in memory */
Arduhdlc hdlc(&send_character, &hdlc_frame_handler, MAX_HDLC_FRAME_LENGTH);

/* Function to send out one 8bit character */
void send_character(uint8_t data) {
    Serial.print((char)data);
}

/* Frame handler function. What to do with received data? */
void hdlc_frame_handler(const uint8_t *data, uint16_t length) {
    // Do something with data that is in framebuffer
}

void setup() {
    pinMode(1,OUTPUT); // Serial port TX to output
    // initialize serial port to 9600 baud
    Serial.begin(9600);
}

void loop() {
    
}

/*
SerialEvent occurs whenever a new data comes in the
hardware serial RX.  This routine is run between each
time loop() runs, so using delay inside loop can delay
response.  Multiple bytes of data may be available.
*/
void serialEvent() {
    while (Serial.available()) {
        // get the new byte:
        char inChar = (char)Serial.read();
        // Pass all incoming data to hdlc char receiver
        hdlc.charReceiver(inChar);
    }
}