And you’ll absolutely get an LED blinking faster in ESP32 BASIC than you will on an Arduino! ... labeled as the MOSI pin for “HSPI”. ... Falling back to built-in command interpreter.

It’s a WiFi SoC that despite its ESP32 name contains a RISC-V core in place of the Tensilica core in the ESP32s we know, and uses the ESP8266 pin-out rather than that of its newer sibling.