diff --git a/Lock.rar b/Lock.rar
new file mode 100644
index 0000000..a833114
Binary files /dev/null and b/Lock.rar differ
diff --git a/Lock/Lock.ino b/Lock/Lock.ino
index 8e646f4..0fc8409 100644
--- a/Lock/Lock.ino
+++ b/Lock/Lock.ino
@@ -67,10 +67,19 @@
 #define relay_2 6 //6     // Set Relay 1 Pin
 #define button_2 8 // button exit 
 
-#define wipeB A0     // Button pin for WipeMode
+
 
 #define Light A1 // Led tro sang camera
+//------------------------
+#define ss A0
+int stt_ss;
+int stt_old_ss;
+String input_ss;
 
+int th = 1023; // ngưỡng
+int time_get = 250;
+
+//------------------------
 
 int stt;
 int stt_old;
@@ -95,14 +104,14 @@ void setup()
   pinMode(13, OUTPUT);
   pinMode(Light, OUTPUT);
   digitalWrite(13, LOW);
-  
+
   pinMode(ledView, OUTPUT);
-  pinMode(wipeB, INPUT_PULLUP); // Enable pin's pull up resistor
+  pinMode(ss, INPUT);
   pinMode(relay, OUTPUT);
   pinMode(relay_2, OUTPUT);
-  pinMode(button,INPUT);
-  pinMode(button_2,INPUT);
-  
+  pinMode(button, INPUT);
+  pinMode(button_2, INPUT);
+
   digitalWrite(relay, HIGH); // Make sure door is locked
   digitalWrite(relay_2, HIGH); // Make sure door is locked
   digitalWrite(Light, LOW);
@@ -113,9 +122,10 @@ void setup()
 ///////////////////////////////////////// Main Loop ///////////////////////////////////
 void loop()
 {
-    ReadButton();
-    SerialRead();
-    CheckButton();
+  ReadLightSS();
+  ReadButton();
+  SerialRead();
+  CheckButton();
 }
 
 /////////////////////////////////////////  Access Granted    ///////////////////////////////////
@@ -167,7 +177,7 @@ void ReadButton()
   {
     relay_stt = false;
   }
-    if (stt_2 == 0 && stt_old_2 == 1)
+  if (stt_2 == 0 && stt_old_2 == 1)
   {
     //Serial.println("Button 2 press");
     relay_stt_2 = true;
@@ -176,10 +186,49 @@ void ReadButton()
   {
     relay_stt_2 = false;
   }
-  
+
   stt_old = stt;
   stt_old_2 = stt_2;
 }
+//Read Light Sensor
+bool stt_msg = false;
+void ReadLightSS()
+{
+  //  stt_ss = digitalRead(ss);
+  int val = analogRead(A0);
+  if (val > th) {
+    delay (time_get);
+    int val = analogRead(A0);
+    if (val > th) {
+      stt_ss = 1;
+    } else {
+      stt_ss = 0;
+    }
+  } else {
+    stt_ss = 0;
+  }
+  //
+  if (stt_ss == 1 && stt_old_ss == 0)
+  {
+    stt_msg = true; // bật cờ gửi tín hiệu cho engine bật ads
+    
+    Light_stt = !Light_stt;
+    if (Light_stt == 1) {
+      TurnOn_Light();
+      //        Serial.println("Light sensor press ON");
+    }
+    else {
+      TurnOff_Light();
+      //        Serial.println("Light sensor press OFF");
+    }
+
+  }
+  if (stt_msg == true){
+     Serial.println("open_bf");
+     ClearSerialdata()
+  }
+  stt_old_ss = stt_ss;
+}
 
 
 
@@ -201,17 +250,17 @@ void SerialRead()
       ClearSerialdata();
 
     } else if (input == "4") {
-     
+
       if (Light_stt == true) {
         TurnOff_Light();
-        
+
       }
-       Serial.println("open_4");
+      Serial.println("open_4");
       ClearSerialdata();
     }
     else if (input == "1")
     {
-      
+
       if (relay_stt == false)
       {
         relay_stt = true;
@@ -219,9 +268,9 @@ void SerialRead()
       }
       Serial.println("open_1");
       ClearSerialdata();
-    }else if (input == "2")
+    } else if (input == "2")
     {
-      
+
       if (relay_stt_2 == false)
       {
         relay_stt_2 = true;
@@ -229,8 +278,11 @@ void SerialRead()
       }
       Serial.println("open_2");
       ClearSerialdata();
-    }
-    else
+    } else if (input == "recv_bf")
+    {
+      stt_msg = false;
+      ClearSerialdata();
+    } else
     {
       digitalWrite(13, LOW);
     }
@@ -259,7 +311,7 @@ void CheckButton()
     relay_stt = false;
   }
   //-------------------------
-   if (relay_stt_2 == true)
+  if (relay_stt_2 == true)
   {
     granted_2(4000); // Open the door lock for 300 ms
     relay_stt_2 = false;