I didn't reverse-engineer the protocol for my blood pressure monitor in 24 hours
11 days ago
- #blood-pressure
- #reverse-engineering
- #health-tech
- Author receives a flu vaccine and a blood pressure test at a pharmacy.
- Pharmacy offers a 24-hour blood pressure study using a Microlife WatchBP O3 device.
- Device's measurements are inaccessible to the user, prompting reverse-engineering attempts.
- Author sets up a Windows VM to interact with the device using WatchBP Analyzer software.
- USB traffic is captured using Wireshark to analyze data transmission.
- Blood pressure readings (SYS, DIA, HR) are identified in the data packets.
- Attempts to decode timestamps and additional metrics (OPP, MAP, PP) are partially successful.
- AI tools provide limited help, leading to dead ends and wasted time.
- Author returns the device without fully reverse-engineering the protocol.
- Key takeaway: Blood pressure readings can be higher in clinical settings (White Coat Hypertension).