# Sony WH-CH720N: reconstructing headset control over RFCOMM

> Sony WH-CH720N control is reconstructed as a Linux Python client for the headset's Bluetooth Classic RFCOMM service. The project documents its framed messages, checksum, ACK sequence rule and command map, then uses them for battery readings, six-band EQ and noise-cancelling or ambient-mode control.

- 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/skaka/sony-headphones-linux>
- Primary source: <https://github.com/skaka/sony-headphones-linux/blob/990b1008d164c2c2291a3a4dd3a7527a50bad7ca/README.md>
- Catalog page: <https://awesomerea.org/resources/sony-wh-ch720n-linux-case/>
- Record JSON: <https://awesomerea.org/resources/sony-wh-ch720n-linux-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/sony-wh-ch720n-linux-case/index.md)

## Requirements & limits

- **Prerequisites:** Linux and a paired Sony WH-CH720N headset; the documented command map is for firmware 1.0.8.
- **Limits:** Only one MDR connection can be active at a time.
- **License:** MIT license.

## Primary sources

1. <https://github.com/skaka/sony-headphones-linux/blob/990b1008d164c2c2291a3a4dd3a7527a50bad7ca/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.