servo motor sample #2

#include <Servo.h>
Servo srv;
int deg = 0;
int save_deg = 0;

void setup()
{
  srv.attach(8);
  Serial.begin(9600);
}

void loop()
{
  if (Serial.available() > 0) {
    delay(15);
    deg = readData();
    srv.write(deg);
  }
  if (save_deg != deg){
  Serial.print("degree is ");
  Serial.println(deg);
  }
  save_deg = deg;
}

#define MAX_DIGIT  3

int readData(){
  char c[MAX_DIGIT]="0";
  for ( int i = 0; i < MAX_DIGIT; i++ ) {
    c[ i ]= Serial.read();
    if ( c[ i ] =='¥0')
    break;
  }
  return atoi( c );
}