The RP2040 Metro Board: Powerful Development Platform, Arduino-Friendly Features
The RP2040 Metro Board packs a punch in a familiar form. Built around the Raspberry Pi RP2040 chip, it offers robust processing power, ample memory, and generous GPIO pins, making it ideal for a wide range of projects.
Familiar Footprint, Extra Muscle:

Arduino-style layout keeps things comfortable for experienced users.
Extra space and debugging ports provide flexibility for more ambitious projects.

Dual Cores, Ample Memory:

Two Cortex M0+ cores deliver impressive performance for demanding tasks.
264KB of RAM ensures smooth operation for complex applications.

Packed with Connectivity:

24 GPIO pins with 4 supporting analog inputs give you plenty of ways to connect sensors,actuators,and more.
Micro SD card slot expands storage for data logging and larger projects.
Onboard LEDs and NeoPixel driver add visual flair to your creations.

Seamless Debugging:

Dedicated SWD and Pico Probe ports simplify troubleshooting and programming.

Effortless Pin Control:

Unique RX-TX switch lets you choose between traditional Arduino pin order or hardware UART configuration with a flick.No more cutting or soldering needed!

Whether you’re a seasoned hobbyist or a curious newcomer, the RP2040 Metro Board offers a versatile and powerful platform to bring your ideas to life.
Features

RP2040 main chip, 133MHz clock, 3.3V logic

16 MB of QSPI flashfor program storage

24 GPIO, 4 of which are also analog inputs

Micro SD card socketwired up for SPI interfacing, also has extra pins connected for advanced-user SDIO interfacing (note that there’s no released usage code for SDIO in Arduino/Python, so this is a super-cutting-edge setup)

OnboardRGB NeoPixel

Onboard#13 LED

Stemma QTport for I2C peripherals and sensors

Reset and Boot buttonson PCB edge

Pico Probedebug port – 3 pin JST SH compatible

SWD debugport – 2×5 0.05″ standard connector

USB Type Cpower and data

5.5mm / 2.1mmDC jackfor 6-12VDC power

On/off switchfor DC jack

GPIO pin numbers match classic Arduino pins, other than A4/A5 which are D24 and D25 (there’s only 4 ADC pins on the RP2040)

RX / TX switch for swapping D0 and D1 locations

Resources
Primary Guide: Adafruit Metro RP2040