A mini wifi boards based ESP32-S2FN4R2. Features based ESP32-S2FN4R2 WIFI IC. Type-C USB. 4MB Flash. 2MB PSRAM. 27x IO. ADC, DAC, I2C, SPI, UART, USB OTG. Compatible with LOLIN D1 mini shields. Compatible with MicroPython, Arduino, CircuitPython and ESP-IDF. Default firmware: MicroPython. Tutorials Get started with MicroPython [S2 series]