Detailed Description

LoRa radio codec + driver (PC_ENABLE_LORA) - Semtech SX127x / RFM95-96.

A per-radio plugin for the gateway (PC_ENABLE_GATEWAY): the southbound-radio half of a LoRa-to-web bridge. Two layers:

Codec - the RadioHead-compatible 4-byte frame header (to / from / id / flags) that virtually every hobby / sensor LoRa deployment uses on top of the header-less LoRa PHY. pc_lora_frame_parse() splits a received frame into that header and the payload; pc_lora_frame_build() prepends it. Pure, no hardware.
Driver - the SX127x register protocol (init / send / receive / enter-RX) over a caller-supplied register-access bus (pc_lora_bus). The SPI transfer and the chip-select / reset GPIOs are the integration's - you implement two callbacks that read and write a chip register - so the register sequence is host-testable with a mock bus and portable across whatever SPI peripheral you wire the module to.

Wiring to the gateway (see example LoRaGateway): poll pc_lora_recv(); on a frame, pc_lora_frame_parse() then pc_gateway_uplink(port, header.from, payload, len, rssi). A downlink builds a frame with pc_lora_frame_build() and pc_lora_send()s it. The codec + register protocol are verified on the host; the RF link itself needs the module.

Author: Douglas Quigg (dstroy0)

Date: 2026

Definition in file lora.h.