diff --git a/arduino/arduino/arduino.ino b/arduino/arduino/arduino.ino
deleted file mode 100644
index 03850ce..0000000
--- a/arduino/arduino/arduino.ino
+++ /dev/null
@@ -1,36 +0,0 @@
-
-
-int incomedate = 0;
-
-void setup() {
-  // put your setup code here, to run once:
-   pinMode(13, OUTPUT);
-   Serial.begin(9600); //设置串口波特率9600
-  Serial.println(78, BIN);// "1001110"
-  Serial.println(78, OCT);// "116"
-  Serial.println(78, DEC);// "78"
-  Serial.println(78, HEX);// "4E"
-  Serial.println(1.23456, 0);// "1"
-  Serial.println(1.23456, 2);// "1.23"
-  Serial.println(1.23456, 4);// "1.2346"
-  Serial.println('N');// "N"
-  Serial.println("Hello world.");// "Hello world."
-
-}
-
-void loop() {
-  // put your main code here, to run repeatedly:
-   digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
-   delay(1000); // wait for a second
-   digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
-   delay(1000); // wait for a second
-  if (Serial.available() > 0)//串口接收到数据
-  {
-    incomedate = Serial.read();//获取串口接收到的数据
-    if (incomedate == 'H')
-    {
-      Serial.println("Good Job!");
-    }
-  }
-
-}
diff --git a/arduino/stepper.ino/stepper.ino.ino b/arduino/stepper.ino/stepper.ino.ino
new file mode 100644
index 0000000..35af2db
--- /dev/null
+++ b/arduino/stepper.ino/stepper.ino.ino
@@ -0,0 +1,57 @@
+/*
+ Stepper Motor Control - one revolution
+ This program drives a unipolar or bipolar stepper motor.
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+ The motor should revolve one revolution in one direction, then
+ one revolution in the other direction.
+ Created 11 Mar. 2007
+ Modified 30 Nov. 2009
+ by Tom Igoe
+ */
+#include <Stepper.h>
+#include <Servo.h>
+
+const int stepsPerRevolution = 20;  // change this to fit the number of steps per revolution
+// for your motor
+Servo myservo; // create servo object to control a servo
+
+// initialize the stepper library on pins 8 through 11:
+
+#define CLK 10
+#define CW 9
+#define EN 8
+
+void setup() {
+  // set the speed at 60 rpm:
+  pinMode(CLK,OUTPUT);
+  pinMode(CW,OUTPUT);
+  pinMode(EN,OUTPUT);  
+  // initialize the serial port:
+  Serial.begin(115200);
+  digitalWrite(EN,LOW);
+  myservo.attach(12); // attaches the servo on pin 9 to the servo object
+}
+
+void loop() {
+     char data[20] = {0};
+     digitalWrite(EN,LOW);
+
+  // step one revolution  in one direction:
+     if(Serial.available()){ //if number of bytes (characters) available for reading from { 
+        Serial.readBytes(data,20);
+        Serial.print("I received:"); //print I received
+        Serial.write(data); //send what you read
+        String strInt = data;    // string to hold input
+        int ints = strInt.toInt();
+        Serial.print(ints); //print I received
+        myservo.write(ints); // sets the servo position according to the scaled value
+        for(int cnt = 0;cnt < ints;cnt++){
+          delay(100);          
+          digitalWrite(EN,LOW);
+          delay(100);
+          digitalWrite(EN,HIGH);
+
+        }
+        ints = 0;
+     }
+}