SparkFun Thing Plus – RP2040


The SparkFun Thing Plus – RP2040 is a low-cost, high performance board with flexible digital interfaces featuring the Raspberry Pi Foundation’s RP2040 microcontroller. Besides the Thing Plus or Feather footprint (with 18 GPIO pins), the board also includes an SD card slot, 16MB (128Mbit) flash memory, a JST single cell battery connector (with a charging circuit and fuel gauge sensor), an addressable WS2812 RGB LED, JTAG PTH pins, four (4-40 screw) mounting holes, and our signature Qwiic connector.


The RP2040 contains two ARM Cortex-M0+ processors (up to 133MHz) and features:

264kB of embedded SRAM in six banks
6 dedicated IO for SPI Flash (supporting XIP)
30 multifunction GPIO:
Dedicated hardware for commonly used peripherals
Programmable IO for extended peripheral support
Four 12-bit ADC channels with internal temperature sensor (up to 0.5 MSa/s)
USB 1.1 Host/Device functionality

The RP2040 is supported with both C/C++ and MicroPython cross-platform development environments, including easy access to runtime debugging. It has UF2 boot and floating-point routines baked into the chip. While the chip has a large amount of internal RAM, the board includes an additional 16MB of external QSPI flash memory to store program code.
SparkFun Thing Plus – RP2040 Features

Raspberry Pi Foundation’s RP2040 microcontroller
16MB QSPI Flash Memory
Thing Plus (or Feather) Form-Factor:
18x Multifunctional GPIO Pins
Four available 12-bit ADC channels with internal temperature sensor (500kSa/s)
Up to eight 2-channel PWM
Up to two UARTs
Up to two I2C buses
Up to two SPI buses
USB-C Connector:
USB 1.1 Host/Device functionality
2-pin JST Connector for a LiPo Battery (not included):
500mA charging circuit
Qwiic Connector
PWR – Red 3.3V power indicator
CHG – Yellow battery charging indicator
25 – Blue status/test LED (GPIO 25)
<>WS2812 – Addressable RGB LED (GPIO 08)
Four Mounting Holes:
4-40 screw compatible
Dimensions: 2.3″ x 0.9″

RP2040 General Features:

Dual Cortex M0+ processors, up to 133 MHz
264 kB of embedded SRAM in 6 banks
6 dedicated IO for QSPI flash, supporting execute in place (XIP)
30 programmable IO for extended peripheral support
SWD interface
Timer with 4 alarms
Real time counter (RTC)
USB 1.1 Host/Device functionality
Supported programming languages

1. Note: GPIO 08< is not included in this count, as it passes through the WS2812 addressable RGB LED first. GPIO 07 and GPIO 23 are counted as a single GPIO because they are tied together. 2. Note: The GPIO pins are programmable so you can reconfigure the pins! Check out the RP2040 datasheet for more information on the GPIO functionality. Resources Board Dimensions (PDF) Hookup Guide Software (SDK) Documentation: Online SDK Documentation Raspberry Pi Pico C/C++ SDK (PDF) - A guide on the libraries and tools for C++ development on RP2040 microcontrollers Raspberry Pi Pico Python SDK (PDF) - A guide on the MicroPython environment for RP2040 microcontrollers Hardware Component Information: Raspberry Pi RP2040 Datasheet (PDF) 16MB Flash (W25Q128) Datasheet (PDF) Low Dropout (LOD) Voltage Regulator (AP2112) Datasheet (PDF) Linear Charge Management Controller (MCP73831) Datasheet (PDF) RGB LED (WS2812C) Datasheet (PDF) Fuel Gauge (MAX17048) Datasheet (PDF) SparkFun Qwiic Connect System Software Development Platforms for the RP2040: MicroPython Example code to accompany the Get Started with MicroPython on Raspberry Pi Pico book Pico C/C++ SDK Example codes Beta Libraries Example code for the beta libraries Tools and Resources: RP2040 Boot ROM - Souce code for the USB mass storage device emulation Picotool - Inspecting RP2040 binaries in BOOTSEL mode Debugging Probe Configuration OpenOCD Debugger pico-project-generator - GUI tool to automatically generate a Pico C/C++ SDK project UF2 Files- Just drag-and-drop onto your RP2040 board C/C++ Files: Blink binary Hello World binary MicroPython Files: MicroPython firmware (build date: 05-Feb-2021) Utility Files: microcontroller Reset flach memory - Clears flash memory from board


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