I've been asked to connect and control a finger-sensing device to a Raspberry PI. There is a protocol to respect called OSDP. It supposes a serial connection on top of RS485.
I'm a seasoned C/C++ programmer, but I have very little experience in connecting devices.
I was wondering, to make the task less daunting, maybe I should try a simple "fun project" which will make me feel comfortable with serial communication. Do you have any documentation or books to recommend?