espp/sx126x

# SX126x Component [![Badge](https://components.espressif.com/components/espp/sx126x/badge.svg)](https://components.espressif.com/components/espp/sx126x) The `Sx126x` component provides a driver for the Semtech SX126x series of sub-GHz LoRa radio transceivers (SX1261, SX1262) and compatible chips such as the LLCC68. These radios are found on many popular development boards, including the LilyGo T-Deck (SX1262) and the M5Stack Cardputer-Adv LoRa+GPS Cap (SX1262). Features: - LoRa modem configuration (spreading factor, bandwidth, coding rate, preamble length, sync word, CRC, IQ inversion) - Interrupt-driven (DIO1) or polled operation - Blocking and non-blocking transmit - Continuous receive with RSSI / SNR packet status - Channel activity detection (CAD) - TCXO (DIO3) and RF-switch (DIO2) control - Time-on-air calculation - Datasheet errata workarounds (TX modulation quality, TX clamp, IQ polarity) The radio is a command-based SPI peripheral; the driver is written against the `espp::BasePeripheral` interface and requires a `write_then_read` implementation which keeps chip select asserted across the write and read phases (e.g. a single full-duplex transfer via `espp::Spi::Device::transfer`), which allows it to share an SPI bus with other devices (as on the T-Deck, where the radio shares the bus with the display and uSD card). ## Example The [example](./example) shows how to use the `espp::Sx126x` component to configure the radio and send / receive LoRa packets, configurable (via menuconfig) for the LilyGo T-Deck, the M5Stack Cardputer-Adv with the LoRa+GPS Cap, or custom hardware. Flash it onto two boards and they will ping each other.

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