Raspberry Pi RP2040-Zero microcontroller. Dual-core processor RP2040-Zero RP2040 for Raspberry Pi Microcontroller PICO Development Board Module Dual-core Cortex M0+ Processor 2MB Flash 100% new RP2040 Zero Board (without header) Not soldered (excluding pin headers) $49 RP2040 Zero Board (with soldered header) Soldered $59 Based on Raspberry Pi RP2040, all unused pins are extended in an ultra-small board size Using half-hole technology