Morpheus project: smart ambient data collector

This repository contains the code used for the Morpheus project inside the broader NecstCamp project at Politecnico di Milano in 2019. Specifically, the project aimed to analyze people's sleep collecting information about their heart rate, with a Polar OH1 device, and the quality of the sleeping room, collecting temperature, humidity, CO2, noise and light of the bedroom.

The data from the sensor is sent to a remote InfluxDB instance via REST API and locally stored using CSV format.

The whole system runs as a Linux service to start automatically on a Raspberry-based system. Every sensor runs on separate thread to handle errors in sampling, delayed response from collection server or else.

Each node employs a simple json file as a configuration to know the id of the room in which it was installed, and the id of the participants sleeping there. No personal data is stored on the physical devices

Structure of the repo

arduino_node: An initial iteration using Arduino MKR1000 to measure temperature and humidity
raspberry_node: A linux service running on Raspberry Pi zero-W to communicate with sensors and backend
polar_backend: BLE delegate to collect data from Polar OH1 heart rate sensors and extract some heart rate variability stats

Sensors employed

ADC MCP3008: analog-to-digital readout of sound noise from a mems microphone (Adafruit MEMS SPW2430) and ambient light (GA1A12S202 log-scale analog)
Adafruit si7021 temperature&humidity sensor (I2C protocol)
Adafruit SGP30 CO2 sensor (I2C protocol)
Polar OH1 a heart rate sensor worn by users with data collected through BLE4.0 scanning

Dependencies

See requirements.txt files in the folders.

Currently missing

Schematics with the wiring of the sensors
Test environment and examples

Acknowledgments to project contributors