# DMR-39 Remote Bridge: reconstructing set-top-box remote control

> DMR-39 Remote Bridge reconstructs remote control of the SUPER DMR-39 set-top box by probing its I2C front panel and capturing NEC infrared signals. The resulting ESP32-C3 firmware and Python tools expose mapped buttons through a web relay, with HDMI capture used to observe responses. The author reports mapping all 41 remote buttons.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/evnchn-agentic/dmr39>
- Primary source: <https://github.com/evnchn-agentic/dmr39/blob/f1d46b5bb564b8a72a318cdb0d43eba6ca64212a/README.md>
- Catalog page: <https://awesomerea.org/resources/dmr39-case/>
- Record JSON: <https://awesomerea.org/resources/dmr39-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/dmr39-case/index.md)

## Requirements & limits

- **Prerequisites:** A SUPER DMR-39 set-top box, ESP32-C3, and access to the demodulated IR traces; HDMI capture supports the documented observation workflow.
- **Limits:** The author reports finding only one working key code through I2C injection before switching to IR control.
- **License:** MIT licence.

## Primary sources

1. <https://github.com/evnchn-agentic/dmr39/blob/f1d46b5bb564b8a72a318cdb0d43eba6ca64212a/README.md>

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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.