diff --git a/gdata-characteristic.js b/gdata-characteristic.js
index 4be0314..a453fd5 100644
--- a/gdata-characteristic.js
+++ b/gdata-characteristic.js
@@ -16,22 +16,22 @@ class DataCharacteristic extends bleno.Characteristic {
       ]
     })
   }
-  
+
   onWriteRequest(data, offset, withoutResponse, callback) {
     console.log(`offset :: ${offset} , withoutRes :: ${withoutResponse}`)
     console.log(`get data`, data)
 
-	if(data.length == 1 && data[0] == 0x00){
- 		tmp = []
-		console.log(data[0])
-	}else if(data.length == 1 && data[0] == 0xff){
-		//console.log(tmp)
-		 console.log(new Buffer(tmp).toString())
-	}else{
-		tmp = [...tmp, ...data.slice(2, data.length)]
-	}
+    if (data.length == 1 && data[0] == 0x00) {
+      tmp = []
+      console.log(data[0])
+    } else if (data.length == 1 && data[0] == 0xff) {
+      //console.log(tmp)
+      console.log(new Buffer(tmp).toString())
+    } else {
+      tmp = [...tmp, ...data.slice(2, data.length)]
+    }
     if (!withoutResponse) {
-	console.log('send response')
+      console.log('send response')
       callback(this.RESULT_SUCCESS)
     }
   }