SerialLink - Allow Char instead Int

[levipereira]

Hi, First of all, many thanks for your sharing...it's wonderful. I'm using your Lib Seriallink.h to others projects with esp8266 and arduino uno. I need send/receive char over serial comunication. Far I can understand, it's allow only int values. I'm not familiar with C++ so things get difficult for me. There is any clue how get Char values over RX/TX.

Appreciate your help.