# Adafruit Metro RP2350 > Arduino-Uno-compatible board with RP2350, dual ARM Cortex-M33 at 150 MHz, 520KB SRAM, 16MB QSPI flash, microSD, HSTX port, 23 GPIO on headers, NeoPixel, STEMMA QT, and USB-C. ## Quick Facts - **Brand:** Adafruit - **Board Type:** dev-board - **Price:** ~$24.95 - **Product Readiness:** developer - **CPU:** RP2350 - **CPU Architecture:** ARM Cortex-M33 / RISC-V Hazard3 - **CPU Cores:** 2 - **RAM:** 520KB SRAM - **Flash:** 16MB - **Power:** 5V via USB-C or 6-17V DC barrel jack - **Operating Voltage:** 3.3V - **SD Card:** microSD ## Open Source - **Firmware:** Yes - **Schematics:** No - **PCB Layout:** No ## Certifications RoHS ## Compatible Firmware circuitpython, micropython, C/C++, arduino ## Use Cases - prototyping - education - data-logging - iot - arduino-shields - display ## Components - **RP2350** (mcu): Dual ARM Cortex-M33 or RISC-V Hazard3 at 150 MHz, 520KB SRAM, 12 PIO, TrustZone. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) - **TPS563201** (power): TI TPS563201 synchronous buck converter, 6-17V input, up to 2A at 3.3V. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps563201.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) - **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) ## Protocols - **I2C**: SDA: GPIO22, SCL: GPIO23 - **SPI**: MOSI: GPIO19, MISO: GPIO20, SCK: GPIO18 - **UART**: TX: GPIO1, RX: GPIO0 - **HSTX**: - **SWD**: ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO0 | D0 / RX | UART | uart-rx, digital | | GPIO1 | D1 / TX | UART | uart-tx, digital | | GPIO2 | D2 | GPIO | digital, pwm | | GPIO3 | D3 | GPIO | digital, pwm | | GPIO4 | D4 | GPIO | digital, pwm | | GPIO5 | D5 | GPIO | digital, pwm | | GPIO6 | D6 | GPIO | digital, pwm | | GPIO7 | D7 | GPIO | digital, pwm | | GPIO8 | D8 | GPIO | digital, pwm | | GPIO9 | D9 | GPIO | digital, pwm | | GPIO10 | D10 | GPIO | digital, pwm | | GPIO11 | D11 | GPIO | digital, pwm | | GPIO12 | D12 | GPIO | digital, pwm | | GPIO13 | D13 | GPIO | digital, pwm | | GPIO18 | SCK | SPI | spi-sck, digital | | GPIO19 | MOSI | SPI | spi-mosi, digital | | GPIO20 | MISO | SPI | spi-miso, digital | | GPIO22 | SDA | I2C | i2c-sda, digital | | GPIO23 | SCL | I2C | i2c-scl, digital | | GPIO26 | A0 | GPIO | analog, digital | | GPIO27 | A1 | GPIO | analog, digital | | GPIO28 | A2 | GPIO | analog, digital | | GPIO29 | A3 | GPIO | analog, digital | ## Available Software - **[CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fdownloads&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)** - **[Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)** ## Description ## Overview The Adafruit Metro RP2350 brings Raspberry Pi's RP2350 microcontroller into an Arduino Uno-compatible form factor, delivering a significant performance upgrade over the RP2040-based Metro. The RP2350 offers dual ARM Cortex-M33 cores (or dual RISC-V Hazard3 cores) at 150 MHz with hardware floating-point, 520 KB SRAM, 12 PIO state machines, and TrustZone security — roughly doubling performance and memory compared to its predecessor. The Metro RP2350 provides 16 MB of QSPI flash and a microSD socket (SPI and SDIO-capable) for generous storage. A 22-pin 3-lane differential HSTX FPC connector (Pi 5-compatible) enables high-speed data output for displays and video. The board exposes 23 GPIO on standard Arduino headers, 6 analog inputs, 24 PWM channels, plus 12 additional GPIO via the HSTX port and 2 for USB host. A 5.5mm/2.1mm DC barrel jack accepts 6–17V via a TPS563201 buck converter (up to 2A), with USB Type-C as the primary power and data port. On-board peripherals include a NeoPixel, LED on pin 23, reset and bootloader buttons, a DPDT RX/TX switch, Pico Probe debug connector, STEMMA QT, and an on/off switch for the DC jack. Fully supported by CircuitPython, MicroPython, C/C++ (Pico SDK), and informal Arduino support. Note: ships with the RP2350 A2 revision affected by the E9 erratum on GPIO pulldown inputs. ## Where to Buy - [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6003&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) — 24.95 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6003&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) - [learn guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-rp2350&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) ## Tags `adafruit`, `metro`, `rp2350`, `arduino-compatible`, `cortex-m33`, `hstx`, `circuitpython`, `microsd` ## Images ![Adafruit Metro RP2350](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-metro-rp2350/af01713a4433.jpg) ![Adafruit Metro RP2350](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-metro-rp2350/098731ddf5d2.jpg) ![Adafruit Metro RP2350](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-metro-rp2350/984ebf01adb6.jpg) --- [View full device page](https://openhardware.directory/devices/adafruit-metro-rp2350)