The X-NUCLEO-53L8A1 is an expansion board for any STM32 Nucleo board equipped with the Arduino R3 connectors. It provides a complete evaluation kit that allows you to learn, evaluate, and develop applications based on the VL53L8 series Time-of-Flight sensors. The expansion board is delivered with a cover glass holder in which you can fit three different spacers of 0.25, 0.5, and 1 mm height below the cover glass to simulate various air gaps. Several ST expansion boards can be stacked through the Arduino® connectors, which allow, for example, the development of VL53L8 series ToF applications with Bluetooth® Low Energy or Wi-Fi interfaces.