Olimex RP2350-PICO2 open hardware boards expose all 48 GPIOs for breadboard prototyping

Olimex RP2350-PICO2-BB48 and RP2350-PICO2-BB48R open hardware development boards are built around the Raspberry Pi RP2350B MCU, and expose all 48 GPIOs in a 0.6-inch dual-inline PCB layout. Compared to the earlier PICO2-XL and PICO2-XXL boards, this new board features a breadboard-friendly design with options for PSRAM and microSD on the BB48R version.

Other features include USB-C power/data, BOOT and RESET buttons, a 2A 3.3V regulator, UEXT and Qwiic/Stemma connectors, status LED, and debug pads. With pre-soldered headers, it can be plugged directly into a breadboard, making it ideal for DIY projects, IoT, retro computing, and hardware prototyping.

Olimex RP2350-PICO2-BB48 and RP2350-PICO2-BB48R specifications:

• MCU – Raspberry Pi RP2350B
  • CPU
    • Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trustzone, Secure boot OR
    • Dual-core RISC-V Hazard3 @ 150 MHz
    • Either two cores can be used.
  • Memory – 520 KB on-chip SRAM
  • Package – QFN-80
• Memory – 8 MB external QSPI PSRAM (only on BB48R version)
• Storage
  • 16 MB external QSPI flash (all versions)
  • MicroSD card slot (only on BB48R version)
• USB – USB Type-C port for power and programming
• Expansion
  • All 48x RP2350 GPIOs exposed, breadboard-friendly 0.6″ (15.24 mm) DIL layout
  • UETX connector with UART, I2C, and SPI
  • Qwiic/Stemma I²C connector
• Misc
  • Boot and Reset buttons
  • Status LED
• Power Supply
  • 5V via USB-C port 0r 1.8 to 5.5V via VS pin
  • Onboard DC-DC regulator 3.3 V, 2 A (3 A peak)
  • +3.3 V output up to 2 A for external devices
• Dimensions – 69 × 18 mm (4-layer PCB for better noise immunity and USB routing)

In terms of software support, it works with the official Raspberry Pi C SDK and can also be programmed with MicroPython, although support for the RP2350B is still limited (GPIO30–47 are not yet accessible). For full GPIO functionality, CircuitPython from Adafruit already provides complete support. Additionally, Arduino IDE support is available, making the board compatible with a wide range of development workflows.

The company also provides documentation for the RP2350-PICO2-BB48, including a user manual, EU and UKCA declarations of conformity, schematic (PDF), pinout diagram, KiCAD hardware design files, and other resources available on GitHub.

The Olimex RP2350-PICO2-BB48 is priced at €9.95 (~$11.65), while the enhanced RP2350-PICO2-BB48R variant featuring PSRAM and microSD support is available for €13.95 (~$16.30) through the Olimex online store.

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