Wireless Module Literature for Beginners


I’ve always had an interest in embedded systems. I’ve programmed microcontrollers to interface with various digital and analog I/O and I2C devices.

How can I get started on learning what a wireless module / chip is, how to interface with it, what it does, how to choose one, etc?

The Source is overwhelming, and everything I can find - literature, forum topics, etc. are already so detailed and far over my head, I’m not sure how to get started.

Thanks for any help.

how about this one?