Custom Healthypi-Style IoT Monitor

Budget: ₹37500 - ₹75000

I want to build an open-source bio-signal acquisition platform that follows the Healthypi-5 approach yet extends it for my medical research needs. In addition to heart-rate, SpO₂ and full-lead ECG capture, the device must record body temperature plus height and weight using the VL53L8CX ToF sensor and an HX711 load-cell interface respectively.

All signals should stream in real time to an end-to-end IoT stack so I can review them from anywhere—think secure MQTT or HTTPS up to a lightweight cloud service, then a responsive dashboard or mobile view for live and historical plots.

Key expectations • Hardware: complete schematic and PCB layout for the main board, daughterboards for the VL53L8CX and HX711 if required, and a parts list that sticks to widely available components. • Firmware: clean, well-commented code that handles sensor fusion, basic filtering and packetises the data for network transmission (C/C++ or MicroPython are both fine). • Cloud & UI: a small but functional backend (Node-RED, AWS IoT, Firebase or similar) with authentication plus a simple web/mobile interface that graphs each channel and allows CSV/JSON export. • Documentation: build instructions, calibration notes, and a walkthrough explaining how to flash the firmware and bring the entire pipeline online.

Acceptance criteria

1. Continuous acquisition of ECG, heart-rate, SpO₂, temperature, height, and weight for at least 8 hours on USB power without buffer overruns.
2. Height readings within ±2 cm and weight within ±0.2 kg against reference instruments.
3. Data visible on the dashboard within 2 s of capture with no loss over a standard Wi-Fi link.
4. All design files released under an open-hardware/software licence.

If you have prior experience with Healthypi, ESP32/Raspberry Pi Pico, VL53L8CX, HX711, BLE or MQTT, you’ll hit the ground running. Let’s create a robust, shareable tool for researchers everywhere.