Module chip 

Telling the concentrator apart from its relatives, and from nothing at all.

Two questions get asked of a board before anything is loaded onto it. The version register answers the first: a concentrator that is powered, wired the right way round, and clocked reads back EXPECTED_VERSION, and a board that reads anything else is not talking.

The part number answers the second, and it lives in one-time programmable memory rather than a register, so it takes two transfers: select the byte, then read it. The SX1302 and the SX1303 are the same silicon to the SPI bus, and only this byte separates them.

Enums

Model

Which concentrator this is.

Step

A step in reading the part number.

Constants

EXPECTED_VERSION

What the version register reads on a concentrator that is answering.

MODEL_BYTE_ADDRESS

Where the part number sits in the one-time programmable memory.

Functions

answers

Whether the version register says a concentrator is answering.

identify

The transfers that read the part number, in order.