An Arduino isn’t worth very much unless it can talk to the outside world, and making the familiar Arduino commands work with the ESP32’s peripheral hardware is the job of the core firmware.

In case you missed it, the big news is that a minimal Arduino core is up and working on the ESP32. There’s still lots left to do, but the core functionality — GPIO, UART, SPI, I2C, and WiFi ...

512KB SRAM and 16KB of RTC SRAM Dual-core CPU at 240 MHz clock speed USB-C programming port The Arduino Nano ESP32 is available to order today in the Arduino Store, starting at $18.

There is now extended ESP32 support - i.e. non Arduino boards - to ESP32-S2, ESP32-S3 and ESP32-C3 devices, commonly used by hobbyists and developers.