Contact person: Business Client

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Location: Delhi, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I’m building a compact wearable that runs on an ESP32 and need firmware that reliably powers its core features: health monitoring and fitness tracking. The device integrates three sensors—heart-rate, accelerometer, and temperature—so the code must acquire, timestamp, and store data from each, handle basic preprocessing (e.g., simple averages or thresholds), and expose clean interfaces for a companion app to read the results.

Power efficiency and stability are critical because this is a body-worn product. Please structure the project so I can adjust sampling rates, sleep cycles, and any calibration constants without rewriting large sections of code.

Deliverables
• Well-commented ESP-IDF or Arduino framework source code that compiles error-free
• A brief README outlining build steps, pin assignments, and how to extend or modify sensor routines
• A short test routine (serial or BLE output) showing live readings from all three sensors

I’ll flash and run the firmware on my hardware to confirm that all three streams operate continuously for at least two hours without crashes or significant data loss." (client-provided description)