The ESP32-S2-MINI-2-N4R2 is a compact Wi-Fi module from Espressif, integrating the ESP32-S2FN4R2 SoC with a 240 MHz Xtensa® LX7 processor for efficient IoT designs. It combines 4 MB flash, 2 MB PSRAM, 320 KB SRAM, and an onboard PCB antenna within a 15.4 × 20.5 × 2.4 mm SMD package, supporting IEEE 802.11 b/g/n at 2.4 GHz and operating from a 3.0–3.6 V supply for reliable wireless connectivity in space-constrained applications.