SystemsThe ESP32-PICO-D4 is a System in Package (SiP) module with an ESP32-based core, manufactured by Espressif Systems. This module combines a dual-core microcontroller (MCU), 4 MBytes of Flash memory, and Wi-Fi and Bluetooth connectivity in a tiny 7 mm × 7 mm package, making it ideal for compact embedded systems. With an advanced RF system on a chip, the ESP32-PICO-D4 module provides high performance and a low-power architecture. It is also equipped with a high-performance, low-power Wi-Fi and Bluetooth combo chip, allowing for great wireless communication capabilities. The ESP32-PICO-D4 module is powered by an ultra-low-power dual-core Tensilica LX6 MCU and supports a wide variety of peripherals for a broad range of applications. It has a highly integrated LGA48-pin package with a footprint of only 7 mm × 7 mm. Moreover, the ESP32-PICO-D4 is a cost-effective Wi-Fi and Bluetooth combo solution for the Internet of Things (IoT) applications. The module ensures reliable communications and robust connectivity, making it an ideal solution for a wide range of applications.