Android Motion Collector

Android Motion Collector is an Android app designed to collect gyroscope, accelerometer, and gravity sensor data from a smartwatch and transfer it to a smartphone in CSV format with accurate timestamps. Furthermore, it gives prediction to the movement from a wearable to the phone in real-time. The application is used to primarily to compare sensor data output with iOS Motion Collector (Apple Watch 4) and utilized the trained TensorFlow lite model (Float32) to give real-time prediction. The application is one of the 2 applications used to finish the thesis of Wittawin Panta, Computer BSc, Eötvös Loránd University, 2023/2024-2. The thesis name is Machine Learning Based Real-time Movement Detection of Children.

Features

• Collects data from gyroscope, accelerometer, and gravity sensors.
• Captures sensor data with precise timestamps.
• Exports data in CSV format.
• Give interence from the wearable to the phone in real-time.
• Lightweight and battery-efficient.

Requirements

• Android Studio or equivalent IDE.
• A compatible Android smartphone.
• A compatible Android smartwatch.

Installation

1. Clone this repository to your local machine:

   git clone https://github.com/black-hole-diver/android-motion-collector.git

2. Open the project in Android Studio.
3. Build and run the project on both the smartwatch and the smartphone.

Usage

1. Connect Devices: Make sure both the smartphone and smartwatch are paired via Bluetooth.
2. Launch Apps:

• Start the Sensor Data Collector app on phone.

3. Start Collection:

• Press the "Start" button on the phone to begin collecting data.
• Data is continuously sent to the smartphone and sent to Downloads/ directory on phone.

Data Format

The exported CSV file contains the following columns:

1. Timestamp (milliseconds since epoch)
2. Accelerometer with X, Y, Z values (uacc_x, uacc_y, uacc_z)
3. Gravity with X, Y, Z values (grav_x, grav_y, grav_z)
4. Gyroscope with X, Y, Z values (gyr_x, gyr_y, gyr_z)