# RFLink ESP

> RFLink ESP is ESP32 and ESP8266 firmware that receives and decodes 433 MHz OOK device messages. Its debug mode reports unrecognized pulse timings, and its plugin guide uses those captures to investigate a device's radio protocol and add a decoder.

- Type: Tool
- Targets: Protocol
- Category: Protocol analysis tools
- Relationship: Foundation tool
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/cpainchaud/RFLink32>
- Primary source: <https://github.com/cpainchaud/RFLink32/blob/dbf78f81b6a03d8fb84cee4dff6e2a962f4c848c/doc/how_to_write_a_plugin.md>
- Catalog page: <https://awesomerea.org/resources/rflink-esp/>
- Record JSON: <https://awesomerea.org/resources/rflink-esp/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/rflink-esp/index.md)

## Requirements & limits

- **Prerequisites:** An ESP32 or ESP8266 board and a compatible radio receiver such as RXB6 are needed.
- **Prerequisites:** The documented build workflow uses PlatformIO or Arduino IDE.
- **Limits:** OLED display support is experimental and disabled by default.
- **License:** The repository contains RFLink Gateway License v1.0 in License.txt.

## Primary sources

1. <https://github.com/cpainchaud/RFLink32/blob/dbf78f81b6a03d8fb84cee4dff6e2a962f4c848c/doc/how_to_write_a_plugin.md>
2. <https://github.com/cpainchaud/RFLink32/blob/dbf78f81b6a03d8fb84cee4dff6e2a962f4c848c/README.md>
3. <https://github.com/cpainchaud/RFLink32/blob/dbf78f81b6a03d8fb84cee4dff6e2a962f4c848c/License.txt>

## More in Protocols

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.