Merge branch 'master' of https://github.com/bitbank2/Thermal_Printer

Author: bitbank2

README.md

@@ -24,4 +24,8 @@ Features<br>
 - Supports graphics (dots, lines, text, bitmaps) and plain text output<br>
 - Includes easy to use BLE scanning and connection logic<br>
 - Doesn't depend on any other 3rd party code<br>
+<br>
+
+If you find this code useful, please consider sending a donation.
 
+[![paypal](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=SR4F44J2UR8S4)