The ESP32-WROOM-32UE-N4 from Espressif Systems is a Wi-Fi and Bluetooth module based on the ESP32-D0WD-V3 dual-core Xtensa LX6 processor running up to 240 MHz, integrating 4 MB QSPI flash and 520 KB SRAM for embedded firmware and connectivity stacks. Supplied in a compact 18 × 19.2 × 3.2 mm SMT module with a U.FL connector for external antenna, it supports 802.11 b/g/n Wi-Fi and Bluetooth 4.2 (BR/EDR + BLE), operates from 3.0 V to 3.6 V, and is rated for -40°C to +85°C, making it suitable for robust industrial IoT, wireless control and connected HMI designs.