The reference docs are here:
There is another company that uses the same chip, it is 20230308 - Waspmote
IMPORTANT!!!
There another transceiver with all the circuitry inside, it is the RFM96, that is just an implementation of the SX1272 on a small PCB. Link to purchase on RS Components. It is better to use dire ctly this board. There are tons of applications with Arduino and other systems. On Faunaphotonics I have some of those chips that I can use myself.
The most used tools are:
Here a super simple guide about how to use the RFM96
It is possible to buy premade PCB’s with this chip, like Lora Radio Node v1.0, the documentation here. It is necesary an ISP programmer or arduino Bootloader.