Duozone clock.ino

#include <Wire.h>
#include <Adafruit_MotorShield.h>
#include "utility/Adafruit_PWMServoDriver.h"

// Create the motor shield object with the default I2C address
Adafruit_MotorShield AFMS = Adafruit_MotorShield(); 
// Or, create it with a different I2C address (say for stacking)
// Adafruit_MotorShield AFMS = Adafruit_MotorShield(0x61); 

// Connect a stepper motor with 200 steps per revolution (1.8 degree)
// to motor port #2 (M3 and M4)
Adafruit_StepperMotor *myMotor = AFMS.getStepper(200, 2);
int onOffSwitch = 8;
String currentTimeZone = "SF";
int switchState = 0;

void setup() {
  Serial.begin(9600);           // set up Serial library at 9600 bps
  pinMode(onOffSwitch, INPUT);
  AFMS.begin();  // create with the default frequency 1.6KHz
  myMotor->setSpeed(10);  // 10 rpm   
}

void loop() {
  
  switchState = digitalRead(onOffSwitch);
  
  // BJ time
  if (switchState == 1 && currentTimeZone == "SF") {
    currentTimeZone = "BJ";
    myMotor->step(15/1.8*16, FORWARD, MICROSTEP);
  }
  
  // SF time
  if (switchState == 0 && currentTimeZone == "BJ") {
    currentTimeZone = "SF";
    myMotor->step(15/1.8*16, BACKWARD, MICROSTEP);
  }
  
  Serial.println(currentTimeZone);
  
  myMotor->step(15/1.8, FORWARD, MICROSTEP);
  delay(1000);

}