Based on the VL53L5CX Time-of-Flight 8x8 multizone ranging sensor with wide field of view, the STSW-IMG035 is a simple and robust gesture recognition solution. The software includes a complete development ecosystem with ready-to-use example code and intuitive GUI for reduced design times.
The VL53L5CX gesture recognition algorithms can detect multiple motions. They include: single and double tap, swiping in four directions (left, right, up, and down), and level control.
The application can run on microcontrollers based on Cortex® M0+ and M4-based microcontrollers, thanks to the libraries available in the package. The package includes: the GUI executable, example code for the NUCLEO-F401RE board, libraries for supported Cortex® cores, and an easy-to-read user manual.
To run the GUI, a VL53L5CX Nucleo expansion board (X-NUCLEO-53L5A1) is required with a NUCLEO-F401RE Nucleo board. These two boards are also available as a kit under P-NUCLEO-53L5A1. You can also use the breakout boards (VL53L5CX-SATEL) connected to the STM32 Nucleo board as described in the application note AN5717.
One major advantage of this gesture solution is that it provides full privacy thanks to the VL53L5CX computing distance information (no image, no camera). The performances are independent of target reflectance. The solution works even with gloves or in low light conditions, unlike camera-based solutions.
The gesture recognition mode can be combined with the distance measurement mode of the VL53L5CX sensor, allowing user detection and system activation use-cases. The small size of the sensor makes it easy to integrate, and it can be hidden behind a dark cover window.
Gesture recognition can be used to enhance numerous applications and end-products. It perfectly fits to home appliances devices like coffee machines, cooking plates or ovens. In public places, it could control vending machines, elevator call buttons, and more. Personal electronics can also benefit from gesture recognition: especially in smart speakers, laptops, tablets, or AR/VR headsets.
The VL53L5CX allows multi-zone distance measurements with up to 8x8 real time native zones and a wide 63° diagonal field of view. Each zone of the sensor can measure the distance to a target at up to 4 meters with a maximum frequency of 60 Hz. With ST’s patented histogram algorithms, the VL53L5CX is able to detect multiple objects within the FoV and ensures immunity to cover glass crosstalk beyond 60 cm.