Local telemetry
Custom Bluetooth characteristics carry identity and structured live readings directly to nearby devices.
Under design
Connected hardware
Duct Airflow Anemometer
A connected airflow measurement concept for 7-inch ducts, pairing a Hall-effect rotor sensor with local Bluetooth telemetry and companion Apple-device monitoring.
Design objective
Make multi-point duct airflow easier to see.
The design combines an ESP32-S3 sensor module, a magnet-driven Hall-effect pulse input, battery telemetry, and Bluetooth Low Energy. Companion iPhone, iPad, and Apple Watch prototypes are being developed to discover equipment and show live readings without a cloud relay.
- Two magnet pulses counted per rotor revolution
- Local Bluetooth discovery and live telemetry
- Per-sensor RPM, airflow, battery, and health data
- Combined CFM for multiple connected sensors
Hardware path
A serviceable sensor architecture.
The current production-board direction uses a board-mounted DRV5032 Hall switch on the 3.3-volt rail with an ESP32-S3 module. The sensor position, magnet gap, switching threshold, and maximum rotor speed still require mechanical validation on the actual 7-inch rotor.
Distinct equipment IDs
Each sensor generates and stores a unique part number for recognition in multi-sensor environments.
Development status
Prototype software exists; calibration and production validation are still in progress.
The rotor-to-airflow calibration factor is not final, the production PCB is a placement and net-intent design, and the sensor is not currently offered as a certified measurement instrument. Specifications and availability may change.