Herein are presented the architecture of our system and its individual components. The main consideration was for the system to be as simple as possible, without compromising any functionality.

Contents

• System Architecture
  • General Sketch
  • Hardware Architecture
  • Software Architecture
• Selected Components
  • Hardware Components
    • Off the shelf
    • Ad-Hoc
  • Software Components
• Open Issues

System Architecture

General Sketch

Hardware Architecture

• Smartphone:

  • Serves as an interface device and is also a computational node of the system. It receives data from the various sensors and elaborates and collects them and then sends instructions to the actuators’ controller.

  • Carried by the user.

• Actuator Gateway:

  • Receives instructions from the smartphone and controls the actuators accordingly. Essentially a gateway for integrating the actuators.

  • Located inside the user’s home.

• Heartbeat Sensor:

  • Senses in real time vital parameters of the user and sends them to the gateway.

  • Worn on the user’s finger. (FR 3.1)

• Actuators:

  • are located in various positions throughout the room

  • Lights: receive instructions from the actuator controller to dim the lights and change the lighting hue. (FR 4.2)

  • Speaker: receives instructions from the actuator controller and plays music selected by the user as well as instructions on the breathing pattern to be followed(FR 4.1)

  • Aroma diffuser: receive instructions from the actuator controller and diffuses aroma in the user’s environment. (FR 4.3)

• Microphone:

  • Records the user’s breathing and sends the data to the smartphone

  • Worn on the user

Software Architecture

• Offline server

  • Contains the user’s preferences, audio tracks (F2.1, 4.1)

• Actuator gateway software

  • programmed in Python 2.7, running on the same device

  • Actuators control (FR 4.1, 4.2, 4.3)

• Smartphone app

  • programmed in Java, running on the smartphone

  • Interface for the user (FR 1.1, 1.2, 2.2, 2.1)

  • Analysis of sensor data and subsequent instructions to the microcontroller

  • Offline data collection management (FR 2.1, 2.2)

  • Communication with the online server via SQLite, JQuery and Bootstrap (FR 1.1, 1.2, 2.1)

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Selected Components

Hardware Components

Off the shelf

To be procured

• CC3000 adafruit WiFi shield
• “Spark electronics” pulse sensor
• Smartphone (Android 5+), already in our possession

Ladispe

• 2 Arduino
• Raspberry Pi
• Philips hue lights
• Speakers

Ad-Hoc

Aromatherapy diffuser
Device to be constructed, able to diffuse a relaxing scent throughout the user’s environment in the case of a panic attack. Consisting of a simple store bought automatic aroma diffuser, specially customized and connected to the microcontroller of the system.

Software Components

• Java (Android), Used for the mobile app development
• Python 2.7, Used for the actuator gateway programming and online server management
• SQLite, SQL library for the servers’ management
• Flask, framework for the HTTP communication management

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Open Issues

• Hardware needed to detect the user’s heartbeat in real time.
• How to detect the user’s breathing pattern and adjust the instructions in real time.