The Espressif ESP32-S2-Saola-1 is a compact Wi-Fi development board based on the single-core LX7 MCU, featuring 4 MB SPI flash, USB programming, and rich peripherals including GPIO, SPI, I²C, I²S, UART, ADC, DAC, and touch inputs. Available in variants with PCB antenna (-1M), external antenna (-1U), or extra 2 MB PSRAM (-1R), it includes hardware security features and is ideal for low-power IoT prototyping and wireless applications.