WiiChuckDemo with 7-Segment Display for button presses

gistfile1.ino

/*
 * WiiChuckDemo -- 
 *
 * 2008 Tod E. Kurt, http://thingm.com/
 *
 * with code for 7-Segment Display added by Chris Nolan.ca
 * based on https://gist.github.com/3268581
 *
 */

#include <Wire.h>
#include "nunchuck_funcs.h"
#include <SoftwareSerial.h>

int loop_cnt=0;

byte accx,accy,zbut,cbut;
int ledPin = 13;

#define SerInToArdu 2
#define SerOutFrmArdu 3
#define wDelay 300
SoftwareSerial mySerialPort(SerInToArdu,SerOutFrmArdu);
String seven_seg;

void setup()
{
  
    pinMode(SerOutFrmArdu,OUTPUT);
    mySerialPort.begin(9600);
    mySerialPort.print("v");
    seven_seg = "x--x";
    mySerialPort.print(seven_seg);
    
    Serial.begin(19200);
    nunchuck_setpowerpins();
    nunchuck_init(); // send the initilization handshake
    
    Serial.print("WiiChuckDemo ready\n");
}

void loop()
{
    if( loop_cnt > 100 ) { // every 100 msecs get new data
        loop_cnt = 0;

        nunchuck_get_data();

        accx  = nunchuck_accelx(); // ranges from approx 70 - 182
        accy  = nunchuck_accely(); // ranges from approx 65 - 173
        zbut = nunchuck_zbutton();
        cbut = nunchuck_cbutton(); 
            
        Serial.print("accx: "); Serial.print((byte)accx,DEC);
        Serial.print("\taccy: "); Serial.print((byte)accy,DEC);
        Serial.print("\tzbut: "); Serial.print((byte)zbut,DEC);
        Serial.print("\tcbut: "); Serial.print((byte)cbut,DEC);
        
        if (zbut == 0) {
          seven_seg.setCharAt(0, '0');
        } else {
          seven_seg.setCharAt(0, '1');
        };
        if (cbut == 0) {
          seven_seg.setCharAt(3, '0');
        } else {
          seven_seg.setCharAt(3, '1');
        };
        mySerialPort.print(seven_seg);
        Serial.print("\t7Seg: "); Serial.println(seven_seg);
    }
    loop_cnt++;
    delay(1);
}