{
  "added_at": "2026-11-08",
  "category": "reconstruction-cases",
  "class": "hardware",
  "description_en": "A protocol study and Python client reconstruct the OxyII Bluetooth LE link used by the Wellue O2Ring-S T8520 pulse oximeter. It documents GATT characteristics, framing, CRC-8 and commands for device information, live SpO2 and heart rate, and stored-file transfer.",
  "description_zh": "该研究与 Python 客户端还原 Wellue O2Ring-S T8520 血氧仪使用的 OxyII BLE 链路，记录 GATT 特征、帧格式、CRC-8，以及设备信息、实时血氧和心率、历史文件传输命令。",
  "entry_url": "https://awesomerea.org/resources/o2ring-s-protocol-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/o2ring-s-protocol-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/nglessner/o2ring-s-protocol/blob/8a1d60367f79f97af68177242657954b0462963a/README.md",
  "group": "cases",
  "id": "o2ring-s-protocol-case",
  "json_url": "https://awesomerea.org/resources/o2ring-s-protocol-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/o2ring-s-protocol-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/o2ring-s-protocol-case/index.md",
  "name": "Wellue O2Ring-S: reconstructing the OxyII BLE protocol",
  "name_zh": "Wellue O2Ring-S：还原 OxyII BLE 协议",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "A Wellue O2Ring-S T8520 and a Bluetooth LE connection are required.",
    "Real-time waveform and PPG sample data have not been decoded or validated; OTA remains unexercised.",
    "MIT license."
  ],
  "requirements_zh": [
    "需要 Wellue O2Ring-S T8520 设备及 BLE 连接。",
    "实时波形和 PPG 样本数据尚未解码或验证；OTA 尚未实际测试。",
    "MIT 许可证。"
  ],
  "scope": "unknown",
  "targets": [
    "protocol"
  ],
  "url": "https://github.com/nglessner/o2ring-s-protocol",
  "verification": "source-reviewed",
  "verified_at": "2026-11-08"
}