diff --git a/app.py b/app.py
index e711f0d..349bd75 100644
--- a/app.py
+++ b/app.py
@@ -1,13 +1,13 @@
 import os
 from flask import Flask, request, abort, jsonify
-
-import unlocker
+from chip_unlocker import ChipUnlocker
 
 PORT = os.environ.get('PORT') or 5000
 CODE = os.environ.get('CODE') or '8787'
-UNLOCKER_PIN = os.environ.get('UNLOCKER_PIN') or 'XIO-P7'
+UNLOCK_PIN = os.environ.get('UNLOCK_PIN') or 'XIO-P7'
 
 app = Flask(__name__)
+unlocker = ChipUnlocker(UNLOCK_PIN)
 
 
 @app.route('/')
@@ -22,7 +22,7 @@ def unlock():
     code = request.args.get('code')
 
     if (code == CODE):
-        unlocker.run(UNLOCKER_PIN)
+        unlocker.unlock()
         return "OK"
     else:
         abort(404)
diff --git a/chip_unlocker.py b/chip_unlocker.py
new file mode 100644
index 0000000..0edeafe
--- /dev/null
+++ b/chip_unlocker.py
@@ -0,0 +1,19 @@
+import time
+import CHIP_IO.GPIO as GPIO
+
+
+class ChipUnlocker:
+    def __init__(self, unlock_pin: str):
+        self.unlock_pin = unlock_pin
+
+    def unlock(self):
+        # 設定接腳
+        GPIO.setup(self.unlock_pin, GPIO.OUT)
+
+        # 送出低電位 0.4 秒後回復到高電位
+        GPIO.output(self.unlock_pin, GPIO.LOW)
+        time.sleep(0.4)
+        GPIO.output(self.unlock_pin, GPIO.HIGH)
+
+        # 復歸接腳
+        GPIO.cleanup(self.unlock_pin)
diff --git a/unlocker.py b/unlocker.py
deleted file mode 100644
index 016fbc2..0000000
--- a/unlocker.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import time
-import CHIP_IO.GPIO as GPIO
-
-
-def run(pin: str):
-    GPIO.setup(pin, GPIO.OUT)
-
-    GPIO.output(pin, GPIO.LOW)
-    print("[Door] Unlocking...")
-
-    time.sleep(0.4)
-
-    GPIO.output(pin, GPIO.HIGH)
-    print("[Door] Unlocked!")
-
-    GPIO.cleanup(pin)