Aiming for this to be back in stock in June 2022

What is it?

Tracer is a cost-efficient, high-performance ESP32-based Inertial Measurement Unit system with excellent compatibility with Open Source libraries in a lightweight, easily mountable small form factor. It also integrates a Time-of-Flight sensor that can be used to sense objects and for gesture control. Leveraging on existing open-source projects, the Tracer fully supports integration with Phyphox and can be programmed using Micropython and Arduino. Power users can also use the ESP-IDF tool for maximum customization.

Key Features;

• Leverage the LSM6DSL to track your objects in real-time.
• Use the VL53L0X for distance measuring or gesture control.
• Easy mounting using high-quality velcro straps allows the unit to be mounted on various objects, from your bicycle to track lean angles to a tennis racquet for pose insights.
• On-board Li-ion battery charging using the TP4065.
• 2.5 hours of battery life at a stream rate of 10 Hz (continuous streaming over Bluetooth).
• 15m BLE range (unobstructed) - tested on a tennis court

Why did you make it?

Have you ever wanted to stick an IMU on a thing to trace its pose and motion? Tracer provides reliable, high-performance, and cost-efficient tracking of objects for various applications. Tracer can be easily mounted using a high-quality velcro strap, allowing it to be fastened on the bicycle's frame for lean and cadence tracking or even the neck of a tennis racquet to count the number of strokes and potentially differentiate between topspin and slice. Let your imagination run wild!

Specification

• Microcontroller | ESP32-PICO-D4
  • WiFi | 802.11b/g/n
  • Bluetooth | BLE 4.2
  • FLASH | 4MB
  • Programming | USB over UART (CP2104)
• Inertial Measurement Unit (IMU) | LSM6DSLTR
  • Accelerometer | ±2/±4/±8/±16 g at 1.6 Hz to 6.7KHz
  • Gyroscope | ±125/±250/±500/±1000/±2000 DPS at 12.5 Hz to 6.7 kHz
• Time-of-Flight (TOF) | VL53L0X
  • Range | Up to 2m
  • 1D Gesture Recognition
• Li-ion Battery Management | TP4065
• Power | 700mA 3.3V LDO
• Weight | 20g, including velcro strap
• Mounting Options | Velcro Strap or 3x M.2.Screws

What makes it unique?

For more technical detail, check out the Github repo or the Hackaday project page.

What does it ship with?

• 1x Tracer unit
• 1x Velcro Strap
• No battery because it is Lithium-Ion, but it uses the LIR2450, which is available on Amazon or RS