HDLC library for arduino
This Project is based on https://github.com/jarkko-hautakorpi/Arduhdlc .
I changed some function name, make code more clean and added one example.
The example is mainly tested on ESP8266 Arduino 2.3.0 environment.
A portable pure C version can be found here: https://github.com/mengguang/minihdlc
More information about HDLC: https://en.wikipedia.org/wiki/High-Level_Data_Link_Control