From 32af5548e622dd4770c400ffb7ce04a37d5fa4bd Mon Sep 17 00:00:00 2001
From: Jay <admin@trj.tw>
Date: Mon, 14 Aug 2017 23:17:03 +0800
Subject: [PATCH] add printer func

---
 config.json             |  3 +++
 gdata-characteristic.js | 24 +++++++++++++++++++++++-
 package.json            |  1 +
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/config.json b/config.json
index a540f7d..74309ac 100644
--- a/config.json
+++ b/config.json
@@ -8,5 +8,8 @@
 				"data":"00000002-8f05-4e30-beb0-6fa7ea3dfc3e"
 			}
 		}
+	},
+	"printer": {
+		"serial": "/dev/ttyUSB0"
 	}
 }
diff --git a/gdata-characteristic.js b/gdata-characteristic.js
index a453fd5..1a80861 100644
--- a/gdata-characteristic.js
+++ b/gdata-characteristic.js
@@ -1,5 +1,13 @@
 const bleno = require('bleno')
 const config = require('./config.json')
+const escpos = require('escpos')
+const device = escpos.Serial(config.printer.serial)
+const printer = escpos.Printer(device)
+let isOpen = false
+
+device.open(()=>{
+  isOpen = true
+})
 
 var tmp = []
 
@@ -26,7 +34,8 @@ class DataCharacteristic extends bleno.Characteristic {
       console.log(data[0])
     } else if (data.length == 1 && data[0] == 0xff) {
       //console.log(tmp)
-      console.log(new Buffer(tmp).toString())
+      console.log(Buffer.from(tmp).toString())
+      printString(Buffer.from(tmp).toString())
     } else {
       tmp = [...tmp, ...data.slice(2, data.length)]
     }
@@ -37,4 +46,17 @@ class DataCharacteristic extends bleno.Characteristic {
   }
 }
 
+
+function printString(str){
+  if(!isOpen) return 
+  let strs = str.split(/\n/)
+  printer.font('a')
+    .align('ct')
+    .size(1,1)
+  for(let i in strs){
+    printer.text(strs[i])
+  }
+  printer.cut(true, 8)
+}
+
 module.exports = DataCharacteristic
diff --git a/package.json b/package.json
index 62b2064..ac0c481 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "license": "MIT",
   "dependencies": {
     "bleno": "^0.4.2",
+    "escpos": "^2.4.3",
     "uuid": "^3.1.0"
   }
 }