diff --git a/PrinterDev.js b/PrinterDev.js
index cd6e025..32ac7c7 100644
--- a/PrinterDev.js
+++ b/PrinterDev.js
@@ -2,11 +2,7 @@ const EventEmitter = require('events')
 const escpos = require('escpos')
 const config = require('./config.json')
 const fs = require('fs')
-
-// const device = new escpos.Serial(config.printer.serial)
-
-// const printer = new escpos.Printer(device)
-// let isOpen = false
+const iconv = require('iconv-lite')
 
 class PrinterDevice {
   constructor() {
@@ -16,6 +12,11 @@ class PrinterDevice {
     this._type = null // type = serial or console
   }
 
+  encodeStr(str){
+    if(!str || typeof str != 'string') return false
+    return iconv.encode(str, 'big5')
+  }
+
   async connect() {
     let chkSerial = await new Promise((resolve, reject) => {
       fs.access(config.printer.serial, err => {
@@ -44,16 +45,41 @@ class PrinterDevice {
     })
   }
 
-  printerString(str) {
-    if (!this._isOpen || !this._printer) return
-    let strs = str.split(/\n/)
+  async printerString(str) {
+    if (!this._isOpen || !this._printer) return false
+
     this._printer.font('a')
       .align('ct')
       .size(1, 1)
-    for (let i in strs) {
-      this._printer.text(strs[i], 'big5')
+
+    let cmds = str.split(/__/).filter(t => t)
+
+    for (let i in cmds) {
+      let tmp = cmds[i]
+      if (tmp[0] === '&') {
+        switch (tmp[1]) {
+          case 'a':
+            let align = tmp.substring(2)
+            if (!align) break
+            this._printer.align(align)
+            break
+          case 's':
+            let size = tmp.substring(2)
+            let sarr = size.trim().split(',')
+            if (sarr.length != 2) break
+            if(!isFinite(sarr[0]) || !isFinite(sarr[1])) break
+            sarr = sarr.map(t => Math.floor(t))
+            this._printer.size(sarr[0], sarr[1])
+            break
+        }
+      } else {
+        this._printer.print(this.encodeStr(tmp))
+      }
     }
-    this._printer.cut(true, 8)
+
+    this._printer.cut(true, config.printer.cutFeed || 4)
+
+    return true
   }
 
   async close() {
@@ -61,7 +87,7 @@ class PrinterDevice {
     if (this._type == 'serial') {
       let self = this
       await new Promise((resolve, reject) => {
-        self._device.close(() => {
+        self._printer.close(() => {
           resolve(1)
         })
       })
diff --git a/app.js b/app.js
index abbd305..b2f6dc4 100644
--- a/app.js
+++ b/app.js
@@ -8,6 +8,16 @@ const MainService = require('./main-service')
 
 const printer = require('./PrinterDev')
 
+async function initSystem(){
+  try{
+    await printer.connect()
+  }catch(err){
+    throw err
+  }
+}
+
+initSystem()
+
 bleno.on('stateChange', state => {
   console.log(`bt device state ${state}`)
   if (state == 'poweredOn') {
@@ -31,7 +41,6 @@ bleno.on('advertisingStart', function (error) {
 })
 
 localEvent.on('print', async (str) => {
-  console.log(`get printer string >>> \n${str}`)
   let status = false
   if (printer.isOpen) {
     try {
@@ -46,4 +55,5 @@ localEvent.on('print', async (str) => {
 
 process.on('SIGINT', () => {
   printer.close()
+  process.exit(0)
 })
\ No newline at end of file
diff --git a/config.json b/config.json
index 9b2bba9..58bd2f0 100644
--- a/config.json
+++ b/config.json
@@ -9,6 +9,7 @@
 		}
 	},
 	"printer": {
-		"serial": "/dev/ttyUSB0"
+		"serial": "/dev/ttyUSB0",
+		"cutFeed": 8
 	}
 }
diff --git a/gdata-characteristic.js b/gdata-characteristic.js
index 2fcd438..c75a73e 100644
--- a/gdata-characteristic.js
+++ b/gdata-characteristic.js
@@ -4,6 +4,7 @@ const localEvent = require('./localEvent')
 
 var tmp = []
 var idx = 0
+var failFlag = false
 
 const notifyDesciptor = new bleno.Descriptor({
   uuid: '8888',
@@ -29,12 +30,23 @@ class DataCharacteristic extends bleno.Characteristic {
     if (data.length == 1 && data[0] == 0x00) {
       tmp = []
       idx = 0
+      failFlag = false
     } else if (data.length == 1 && data[0] == 0xff) {
       console.log(Buffer.from(tmp).toString())
-      localEvent.emit('print', Buffer.from(tmp).toString())
-    } else {
+      if (!failFlag) {
+        localEvent.emit('print', Buffer.from(tmp).toString())
+      }
+    } else if (!failFlag) {
+      let pidx = ((data[0] & 0xff) << 8) + (data[1] & 0xff)
+      if (idx !== pidx) {
+        // insert fail method
+        failFlag = true
+        this.sendNotidy('fail')
+      }
+      idx++
       tmp = [...tmp, ...data.slice(2, data.length)]
     }
+
     if (!withoutResponse) {
       console.log('send response')
       callback(this.RESULT_SUCCESS)
diff --git a/initscript/systemd/ble-server.service b/initscript/systemd/ble-server.service
new file mode 100644
index 0000000..4bd5415
--- /dev/null
+++ b/initscript/systemd/ble-server.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=BLE Printer Server
+After=bluetooth.target
+
+[Service]
+ExecStart=/usr/local/bin/node /usr/local/node/ble-server/app.js
+Restart=always
+User=root
+Environment="NODE_ENV=production"
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file
diff --git a/main-service.js b/main-service.js
index 4dc21c3..eec9898 100644
--- a/main-service.js
+++ b/main-service.js
@@ -2,7 +2,6 @@ const bleno = require('bleno')
 const config = require('./config.json')
 const localEvent = require('./localEvent')
 
-// const TimeCharacteristic = require('./time-characteristic')
 const GdataCharacteristic = require('./gdata-characteristic')
 const dataCharacteristic = new GdataCharacteristic()
 
@@ -17,7 +16,8 @@ class MainService extends bleno.PrimaryService {
   }
 }
 
-localEvent.on('printResult', async str => {
+localEvent.on('printResult', async state => {
+  let str = state ? 'ok' : 'fail'
   dataCharacteristic.sendNotidy(str)
 })
 
diff --git a/package.json b/package.json
index ac0c481..3ff193f 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "dependencies": {
     "bleno": "^0.4.2",
     "escpos": "^2.4.3",
+    "iconv-lite": "^0.4.18",
     "uuid": "^3.1.0"
   }
 }