From 2d8a774b9f28b90b7f72f7aae37e3ce67854596a Mon Sep 17 00:00:00 2001
From: csoft2k <csoft2k@hotmail.com>
Date: Sat, 22 Jul 2017 11:57:49 +0200
Subject: [PATCH] Corrections to pull request 237.

Create a _read function in the Escpos abtract class, which throws a
NotImplementedError.
Rename the isOnline function.
---
 src/escpos/escpos.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/escpos/escpos.py b/src/escpos/escpos.py
index 3639ea1..a1055ab 100644
--- a/src/escpos/escpos.py
+++ b/src/escpos/escpos.py
@@ -79,6 +79,9 @@ class Escpos(object):
         """
         pass
 
+    def _read(self, msg):
+        raise NotImplementedError(); 
+
     def image(self, img_source, high_density_vertical=True, high_density_horizontal=True, impl="bitImageRaster",
               fragment_height=960):
         """ Print an image
@@ -744,7 +747,7 @@ class Escpos(object):
         else:
             return [8];
 
-    def _isOnline(self):
+    def isOnline(self):
         status = self.queryStatus()[0];
         return ((status & RT_MASK_ONLINE) == 0);