Fall Detection

Create your own fall detection sensor using an Arduino! (README will be updated)

How it works

This code runs on an Arduino Nano 33 BLE Sense and uses the inbuilt 9 axis inertial sensor to detect falls using a custom trained machine learning model.

Setup

Clone this repository onto your local computer.

Collecting Data

Follow these steps to collect your own data to train your model.

1. Upload scripts/CollectData/CollectData.ino to your Arduino.

2. Create a folder in the project workspace e.g: arduino.

3. Add a subfolder in the arduino directory with the name of the person whose data you are collection. Feel free to name it something like Person1 if you want the data to remain anonymous.

4. Run scripts/collect_data.py from the terminal using py ./scripts/collect_data.py

5. Connect to your Arduino over Bluetooth Low Energy (BLE) by selecting the Arduino from the list.

6. Once connected, the Arduino's light will turn green and you will be prompted for a command to send to the Arduino. Here is a list of available commands: STOP, WALKING, SITTING, LYING_DOWN, and FALL. The Arduino's LED will change to blue if a valid command has been received. If something went wrong, the LED will light up red. To start recording an action, send the command e.g: WALKING. To stop recording an action, send STOP. If you want to change the types of actions that can be recorded, edit possibleLabels in CollectData.ino to include your action. Important: remember to update POSSIBLE_LABELS_LENGTH with the length of possibleLabels.

   The Arduino will then start recording the action whose data will then be stored in the person's directory in arduino. The data, stored in the form of a CSV, will contain the following information: x_acc, y_acc, z_acc, label_name

LED Signals

Use this guide to understand the Arduino's signals through its LED:

• RED (Long): Waiting for connection
• Red (Blink): Unknown command
• BLUE: Valid command
• GREEN: Connected over BLE
• YELLOW: Sending data over BLE

Detecting Falls

Upload the contents of scripts/FallDetection to the Arduino. The script currently needs to be plugged into the computer to work. README and script will be updated to support fall detection remotely.