Swing Path Tracking

This is a repo of the final project of the embedded system course. (2021 spring)

Motivation

• We are in the baseball team of NYCU
• Batting is a important part in baseball
• We want to track the path of bat while swinging
• Improve training efficiency
• Help player to adjust batting pose

Idea

• Use IMU (GY-801) to track the path
• Plot and visualize the path
• Show the result via Line Notify

Hardware

• Raspberry Pi: MQTT Broker and client, data processing and visualization, send result via Line
• ESP32-S: MQTT Client, collect raw data from the IMU
• GY-801: IMU
• Battery (18650)

Software

• Python: Used on Raspberry Pi
• Micropython: Used on ESP32-S
• MQTT (Message Queuing Telemetry Transport)
• Line Notify API: Used to send message

How to use

With ESP32

1. Connect your GY801 to a ESP32, make sure the ESP32 and Raspberry Pi are in the same network.
2. Run main_esp32.py on ESP32.
3. Run mqtt_subscribe.py on Pi to make sure if MQTT is working.
4. Run main_pi.py on Pi to start measuring!

You may need to adjust the setting in line_notifier.py to send the message correctly

Without ESP32

1. Connect GY801 directly to Pi
2. Run main_without_esp32.py on Pi to start measuring!

Where to calibrate

With ESP32

Checkout main_without_esp32.py

Without ESP32

Checkout imu.py

References

• Exploring Data Acquisition and Trajectory Tracking with Android Devices and Python
• AHRS
• gborgonovo/gy801