diff --git a/app.js b/app.js
index 4d5d49a..d195fa7 100644
--- a/app.js
+++ b/app.js
@@ -1,6 +1,7 @@
 const bleno = require('bleno')
+const config = require('./config.json')
 const adapterName = 'BLE_Printer'
-const serverUUID = 'ff9987'
+const serverUUID = config.uuid.main
 
 const MainService = require('./main-service')
 
@@ -24,4 +25,4 @@ bleno.on('advertisingStart', function (error) {
       console.log('set service', error)
     })
   }
-})
\ No newline at end of file
+})
diff --git a/config.json b/config.json
index fa93475..a540f7d 100644
--- a/config.json
+++ b/config.json
@@ -1,5 +1,6 @@
 {
 	"uuid":{
+		"main": "930da73d-1b80-4d3e-a8b6-d9b4e7e771bd",
 		"service":{
 			"id":"dd535b71-8f05-4e30-beb0-6fa7ea3dfc3e",
 			"func":{
diff --git a/gdata-characteristic.js b/gdata-characteristic.js
index 44b82ff..4be0314 100644
--- a/gdata-characteristic.js
+++ b/gdata-characteristic.js
@@ -1,6 +1,8 @@
 const bleno = require('bleno')
 const config = require('./config.json')
 
+var tmp = []
+
 class DataCharacteristic extends bleno.Characteristic {
   constructor() {
     super({
@@ -18,7 +20,18 @@ class DataCharacteristic extends bleno.Characteristic {
   onWriteRequest(data, offset, withoutResponse, callback) {
     console.log(`offset :: ${offset} , withoutRes :: ${withoutResponse}`)
     console.log(`get data`, data)
-    if (withoutResponse) {
+
+	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')
       callback(this.RESULT_SUCCESS)
     }
   }