{
  "added_at": "2026-11-09",
  "additional_evidence_urls": [
    "https://github.com/rpidanny/wireless-doorbell-clone/blob/e5f0d4987a881471a6d50be10af99b6809b2553b/README.md"
  ],
  "category": "reconstruction-cases",
  "class": "hardware",
  "description_en": "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.",
  "description_zh": "Wireless Doorbell Clone 重建 Grundig QH-831A 无线门铃遥控器发送的数据帧，并提供 Arduino 与 MicroPython 发射程序。文档列出比特序列及 475 微秒、1435 微秒两种脉冲时长；仓库还保存了无线电采样数据。",
  "entry_url": "https://awesomerea.org/resources/wireless-doorbell-clone-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/wireless-doorbell-clone-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/rpidanny/wireless-doorbell-clone/blob/e5f0d4987a881471a6d50be10af99b6809b2553b/QH831A.md",
  "group": "cases",
  "id": "wireless-doorbell-clone-case",
  "json_url": "https://awesomerea.org/resources/wireless-doorbell-clone-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/wireless-doorbell-clone-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/wireless-doorbell-clone-case/index.md",
  "name": "Wireless Doorbell Clone: reconstructing a Grundig QH-831A remote frame",
  "name_zh": "Wireless Doorbell Clone：重建 Grundig QH-831A 门铃遥控帧",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "prerequisites",
    "license"
  ],
  "requirements": [
    "Investigating the signal requires an SDR; transmitting it requires an Arduino- or MicroPython-compatible board and a 433 MHz ASK transmitter.",
    "The documented software tools are GQRX, Audacity and Arduino IDE.",
    "MIT License."
  ],
  "requirements_zh": [
    "研究信号需要 SDR；发射信号需要兼容 Arduino 或 MicroPython 的开发板及 433 MHz ASK 发射器。",
    "文档列出的软件工具为 GQRX、Audacity 和 Arduino IDE。",
    "MIT 许可证。"
  ],
  "scope": "unknown",
  "targets": [
    "protocol"
  ],
  "url": "https://github.com/rpidanny/wireless-doorbell-clone",
  "verification": "source-reviewed",
  "verified_at": "2026-11-07"
}