Seeed Studio XIAO RP2040 Plus

Note: 

This product is the Seeed Studio XIAO RP2040 Plus, the upgraded variant of XIAO RP2040 with 15 additional SMD GPIOs and integrated Li-ion battery management. The board and two 7-pin headers are included. No battery, USB cable, or other accessories are included.

Overview

Inspired by the XIAO Plus design language established by XIAO nRF52840 Plus, XIAO nRF52840 Sense Plus, and XIAO ESP32-S3 Plus, the new Seeed Studio XIAO RP2040 Plus expands the Raspberry Pi RP2040 family with additional GPIO resources, integrated Li-ion battery management, and a standardized backside layout for seamless hardware integration.

Powered by Raspberry Pi's RP2040 dual-core ARM Cortex-M0+ processor, XIAO RP2040 Plus brings enhanced expandability to the tiny and versatile XIAO RP2040. While maintaining all the powerful features including Arduino, MicroPython, CircuitPython, and PIO state machines, the Plus variant features redesigned castellations and backside pad layout, providing 15 additional GPIOs and integrated Li-ion battery management. It is ideal for advanced IoT projects, battery-powered wearables, custom PCBA designs, and production-ready SoM applications.

Production-Ready Design with FREE PCBA Support

As an addition to the Seeed Studio XIAO family, the XIAO RP2040 Plus remains the classic XIAO design (thumb-size, SMD, stamp holes). All these features make it a perfect fit for either space-limited applications, or a production-ready System on Module (SoM) for your PCBA designs. Through our Fusion PCBA Sponsorship program, you can not only enjoy the lowest unit prices for all XIAO modules from our Fusion Open Parts Library, but also fabricate and scale your XIAO-based PCBA designs at low cost (30% off) with FREE Design for Manufacturing consulting services, streamlining your journey from prototype to production.

 

Note: 

XIAO SoM User Manual open-sources all hardware and software materials of XIAO, providing professional product design guidelines to help you accelerate ideas off the ground, streamline product design, providing a seamless experience from module selection to mass production. You can check here to see more info.

Features

• High-Performance MCU

Dual-core ARM Cortex-M0+ processor running at up to 133 MHz, equipped with Raspberry Pi's unique PIO (Programmable I/O) state machines. Fully compatible with Arduino, MicroPython, CircuitPython, C/C++ SDK, Rust, Go, and Zephyr for any project from learning to production.

• Multi-Language SDK Support

Code with Arduino IDE for rapid prototyping, leverage C/C++ SDK for optimal performance, script in MicroPython/CircuitPython for quick iteration, or develop with Rust, Go, and Zephyr for modern applications. Backed by comprehensive documentation and an active Raspberry Pi community, you'll find abundant examples and resources to kickstart your projects.

• Efficient Power Management

The onboard PMIC enables direct Li-ion battery connection and provides 3V3/BAT backflow protection for convenient battery-powered applications.

XIAO RP2040 Plus also integrates a software-controlled battery voltage monitoring circuit. GPIO24 (BAT_EN) is used to enable the battery sensing circuit, while GPIO29 (A3) reads the battery voltage through the ADC, allowing the battery status to be monitored directly in software.

• Expanded I/O

15 additional GPIOs through redesigned 1.27mm-pitch SMD castellations, expanding the total available GPIO count for advanced applications. These extra I/Os enable direct connection of more sensors, displays, actuators, and peripherals without requiring external I/O expanders, making XIAO RP2040 Plus more flexible for complex embedded projects and production-ready SoM designs.

• Universal Compatibility — Standardized Backside Layout

Standard backside layout with aligned battery pads and debugger pads, ensuring compatibility with all current and upcoming XIAO expansion boards. One XIAO Plus footprint, infinite project possibilities.

• Classic XIAO Form Factor

21 x 17.8mm thumb-sized design with 2.54mm pin headers, single-sided mounting for wearables and space-constrained projects.

• XIAO Accessory Add-ons Compatibility

Natively compatible with the full XIAO Add-on ecosystem — from expansion boards, sensors and displays to connectivity modules and actuators (Grove Expansion, CAN-Bus, LoRa module, LED Matrix, Vision AI Sensor, Round Display, L76K GPS module, 2-Mic Array, ePaper Displays, mmWave sensor, AC relay, Bus Servo Driver and many more).

• Software-Controlled Battery Monitoring

Monitor battery status directly in software with the onboard battery sensing circuit. GPIO24 (BAT_EN) controls the sensing circuit, while GPIO29 (A3) is used to measure the battery voltage through the ADC. The sensing circuit can be enabled only when needed, providing flexible battery monitoring for portable and battery-powered applications.

• PinOut

• Learning & Education – Arduino, MicroPython, CircuitPython, TinyGo, Rust, embedded systems basics
• USB HID Devices – Custom keyboards, stream decks, arcade controllers, MIDI interfaces
• Wearable Projects – Smart accessories, LED clothing, wrist devices, sensor wearables
• IoT & Sensors – Environmental monitoring, smart home panels, weather stations, MQTT
• Display Projects – LED matrices, POV displays, rotating LED spheres
• Development – Rapid prototyping, hardware testing, PCB validation
• Robotics – Basic motor control, sensor integration, automation
• Audio/Video – Sound processing, media controls, visualizations
• Battery-Powered Devices – Portable data loggers, wireless sensor nodes, remote monitoring, wearables with on-board Li-ion battery, asset trackers
• Mass-Production SoM Designs – Mid-to-high volume products needing extra I/Os and integrated battery management

Wiki-XIAO RP2040 Plus Resources

Seeed Studio XIAO Use Case

3D Printing "Case" Studies