# Wireless Doorbell Clone: reconstructing a Grundig QH-831A remote frame

> Wireless Doorbell Clone reconstructs the Grundig QH-831A doorbell remote's transmitted data frame and implements transmitters in Arduino and MicroPython. The notes give the bit sequence and 475 µs and 1435 µs pulse lengths, while the repository includes captured radio data.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-07
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/rpidanny/wireless-doorbell-clone>
- Primary source: <https://github.com/rpidanny/wireless-doorbell-clone/blob/e5f0d4987a881471a6d50be10af99b6809b2553b/QH831A.md>
- Catalog page: <https://awesomerea.org/resources/wireless-doorbell-clone-case/>
- Record JSON: <https://awesomerea.org/resources/wireless-doorbell-clone-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/wireless-doorbell-clone-case/index.md)

## Requirements & limits

- **Prerequisites:** Investigating the signal requires an SDR; transmitting it requires an Arduino- or MicroPython-compatible board and a 433 MHz ASK transmitter.
- **Prerequisites:** The documented software tools are GQRX, Audacity and Arduino IDE.
- **License:** MIT License.

## Primary sources

1. <https://github.com/rpidanny/wireless-doorbell-clone/blob/e5f0d4987a881471a6d50be10af99b6809b2553b/QH831A.md>
2. <https://github.com/rpidanny/wireless-doorbell-clone/blob/e5f0d4987a881471a6d50be10af99b6809b2553b/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.