DORJI Data Radio Modem (433Mhz)
DRF4463D20 is a high efficient transceiver module designed for operations in the unlicensed ISM (Industrial Scientific Medical) and LPRD bands based on RFIC SI4463 from Silicon labs.
Datasheet
http://www.wiltronics.com.au/datasheets/DORJI/RF-DRF4463D20.pdfNotes
This unit required no example code or library as it connects directly to your UART and acts as a transparent RF link.
The datasheet explains configuration (data rates) if required and mode of operations via two I/O pins.