Simple Nunchuck/Servo mashup

servochuck

// Controlling a servo position using a Wii Nunchuck.
// by Fanjita <http://www.fanjita.org/>
// Includes code from 'Knob' sample by Michal Rinott <http://people.interaction-ivrea.it/m.rinott> 

#include <Wire.h>
#include <Servo.h> 
#include "wiichuck.h"
 
Servo myservo;  // create servo object to control a servo 
 
int potpin = 0;  // analog pin used to connect the potentiometer
int val;    // variable to read the value from the analog pin 
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
  
  // Initialise WiiChuck in pins A2-A5.
  nunchuck_setpowerpins();
  nunchuck_init();
  
  pinMode(13, OUTPUT);
} 
 
void loop() 
{ 
  nunchuck_get_data();
  val = nunchuck_joyx();  // 0 - 256
  val = map(val, 0, 256, 0, 179);     // scale it to use it with the servo (value between 0 and 180) 
  myservo.write(val);                  // sets the servo position according to the scaled value 
  delay(15);                           // waits for the servo to get there 
  
  // Let's also copy the Z-button state to pin13's built-in LED.
  digitalWrite(13, nunchuck_zbutton());
}