implement read for Serial

src/escpos/printer.py

@@ -155,6 +155,10 @@ class Serial(Escpos):
         """
         self.device.write(msg)
         
+    def _read(self):
+        """ Reads a data buffer and returns it to the caller. """
+        return self.device.read(16)
+
     def close(self):
         """ Close Serial interface """
         if self.device is not None and self.device.is_open: