A fantastic compact little microcomputer from Raspberry Pi, the Pico RP2040 features a dual-core ARM Cortex-M0+ processor with 264kB internal RAM and support for up to 16MB of off-chip flash. I/O options includes I2C, SPI, and – uniquely – Programmable I/O (PIO).
The Pico is available as a standalone board, or with 2.4GHz 802.11n Wireless in the Pico W version.
Raspberry Pi Pico – the non-Wifi version
Raspberry Pi Pico Pinout