[sx126x] Add sx126x component

[swoboda1337]

Description:

The SX126X component allows you to configure/control the SX1261, SX1261 and SX1268 transceivers in ESPHome. Supported frequencies range from 150 MHz to 960 MHz. Supported modulations include LoRa, FSK, GFSK, MSK and GMSK. There are many devices in the market with an ESP32 already packaged with these radios.

Datasheet: https://www.semtech.com/products/wireless-rf/lora-connect/sx1262#documentation

Related issue (if applicable): fixes

Pull request in esphome with YAML changes (if applicable):

• esphome/esphome#8516

Checklist:

• [x] I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
  or

• [ ] I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

• [x] Link added in /components/index.rst when creating new documents for new components or cookbook.

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[coderabbitai[bot]]

Walkthrough

This pull request updates several version numbers and documentation details. The version identifiers have been revised across configuration files (Doxygen, _static/version, conf.py, and Makefile), shifting from a stable release to a development version. Additionally, new optional configuration variables and documentation entries have been added for various components (CAN bus, ESPHome, logger, PSRAM, SX126x transceivers, and output components), and new CLI options have been introduced.

Changes

File(s)	Change Summary
Doxygen, _static/version, conf.py, Makefile	Updated version and reference values: PROJECT_NUMBER changed from 2025.3.3 to 2025.4.0-dev, conf.py version updated from "2025.3" to "2025.4", and ESPHOME_REF in Makefile switched from 2025.3.3 to dev.
components/canbus/esp32_can.rst, components/esphome.rst	Added new optional configuration variables: tx_enqueue_timeout for the ESP32 CAN bus and debug_scheduler for ESPHome.
components/logger.rst	Revised the description of deassert_rts_dtr to clarify its sequential handling of UART signals.
components/psram.rst	Updated defaults for configuration variables (mode defaults to quad, speed defaults to 40MHz) and added a new "Restrictions" section outlining PSRAM limitations.
components/index.rst	Added new documentation entries for hardware components: MCP4661 (Output Components) and SX1261/2/8 (Wireless Communication).
components/output/mcp4461.rst, components/sx126x.rst	Introduced new documentation pages for the MCP4461 output component and the SX126x transceiver configuration.
guides/cli.rst	Added new command-line options (--upload_speed BAUD_RATE and --reset) for the esphome run, upload, and logs commands.

Possibly related PRs

• esphome/esphome-docs#4110: Involves a similar update to the PROJECT_NUMBER in the Doxygen configuration.
• esphome/esphome-docs#3916: Contains modifications to the PROJECT_NUMBER tag in the Doxygen file.
• esphome/esphome-docs#4125: Directly relates to the update of the PROJECT_NUMBER in the Doxygen configuration file.

Suggested labels

next

Suggested reviewers

• jesserockz
• frenck

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[swoboda1337]

@bdraco The component was merged but not the docs. Thanks!

[bdraco]

I was too tired to double check it again last night. I have it on my list for later today

[swoboda1337]

Ok thanks, sounds good

[bdraco]

Thanks @swoboda1337