RP2040 Expansion Card

The RP2040 Expansion Card is a community-designed expansion card integrating a Raspberry Pi RP2040 microcontroller into a Framework expansion card form factor¹. Designed by Josh Cook (jyancat) of i2cLabs, it provides a programmable MCU with breakout GPIO, usable as a development board or embedded controller accessible directly from the laptop¹².

Design

The card is built around the RP2040 with an external flash chip for program storage¹. A JST SH connector breaks out I²C, UART, SPI, and SWD interfaces, and a Qwiic/Stemma QT port provides plug-and-play sensor connectivity¹. A NeoPixel RGB LED is included for status indication¹.

Josh Cook assembled five prototype units in April 2023, reporting they worked and broke out nearly all GPIO (four omitted)¹.

Specifications

Specification	Details
MCU	Raspberry Pi RP2040 (dual-core Cortex-M0+)1
Storage	External flash chip1
Breakout	I²C, UART, SPI, SWD, general-purpose GPIO1
Sensor port	Qwiic / Stemma QT (JST SH)1
Indicator	NeoPixel RGB LED1
USB Interface	USB 1.1 (via RP2040 internal PHY)
Case options	Black, white, silver, or no case2
Source	i2cLabs store2
Price	$30 AUD2

Availability

The card is sold assembled and tested through i2cLabs for $30 AUD with multiple case color options². i2cLabs also offers other Framework expansion cards including a UART card, EC debug card, DB9 serial card, CAN-FD card, and LTE card².

Related Projects

Project	Description
RP2350 20-pin GPIO Expansion Card	RP2350A-based GPIO expansion card with 20-pin header
EC Card 2	UART-based EC debug expansion card

Footnotes

1. RP2040 Expansion Card — Framework Community (Josh_Cook, July 2022 – April 2023) ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹

2. RP2040 Expansion Card — i2cLabs store ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶