SparkFun IoT RedBoard - RP2350

Resources:

• Schematic
• KiCad Files
• Board Dimensions
• Hookup Guide
• Datasheet - RP2350
• Qwiic Info Page
• GitHub Hardware Repo

SparkFun IoT RedBoard – RP2350: Dual-Architecture Wireless Development Platform

The SparkFun IoT RedBoard – RP2350 combines the cutting-edge Raspberry Pi RP2350 microcontroller with the Raspberry Pi RM2 wireless module, creating a powerful IoT-ready development board in the Arduino R4 form factor. Designed for versatility and modern connectivity, it supports WiFi 4, Bluetooth 5.2 (BDR & EDR), and BLE, making it an excellent platform for IoT devices, robotics, edge computing, and prototyping. The RP2350B at the heart of this board offers a unique dual-core, dual-architecture system where developers can choose at boot between:

• Two Arm Cortex-M33 cores
• Two Hazard3 RISC-V cores
• One Cortex-M33 + One Hazard3 RISC-V

This flexibility allows tailoring processing power and architecture to specific project requirements. Running at up to 150 MHz, the MCU also provides 48 GPIO, eight ADCs, dual UART/SPI/I2C interfaces, USB 1.1 host/device, 24 PWM channels, and 12 PIO state machines for extensive hardware interfacing. Memory resources include 520kB of integrated SRAM, plus 16MB external Flash and 8MB PSRAM for advanced applications. A built-in uSD card slot further extends storage options. Developers also benefit from Qwiic compatibility, an HSTX high-speed transmit connector, and on-board battery charging and monitoring (MCP73831 LiPo charger + MAX17048 fuel gauge).

Key Features

• MCU: Raspberry Pi RP2350B

  • Dual-core, dual-architecture: Arm Cortex-M33 or Hazard3 RISC-V (user-selectable).

  • 150 MHz max clock speed.

  • 520kB SRAM in 10 banks.

  • 48 GPIO, 8 analog inputs.

  • USB 1.1 host and device.

  • 2× UART, 2× I2C, 2× SPI, 24× PWM, 12× PIO.

• Wireless Connectivity: Raspberry Pi RM2 Radio Module

  • WiFi 4.

  • Bluetooth 5.2 with BDR (1 Mbps) and EDR (2–3 Mbps).

• Memory & Storage

  • 16MB QSPI Flash.

  • 8MB PSRAM.

  • µSD card slot.

• Expansion & Interfaces

  • Arduino R4-compatible form factor.

  • ST Zio/Arduino Uno V3 compatible connectors.

  • Qwiic connector for plug-and-play I²C peripherals.

  • 22-pin HSTX ribbon connector.

  • 3-pin debug header.

• Power & Battery

  • MCP73831 single-cell LiPo battery charger.

  • MAX17048 battery fuel gauge.

  • USB-C power input.

• User Interface

  • Buttons: RESET, BOOT, USER.

  • LEDs: Power (red), Charge (yellow), Status (blue), Wireless (blue), RGB WS2812 LED.

• Form Factor

  • Arduino Uno R4 footprint with female headers and plated through-hole (PTH) headers.

• Software Support

  • Raspberry Pi Pico SDK (C/C++).

  • MicroPython.

  • Arduino IDE compatibility.