RP2040 Pro Micro: Keyboards and Small Builds
The RP2040 Pro Micro is a compact board with a dual-core RP2040 processor, 16MB flash, USB-C, and BOOT and RESET buttons. It runs MicroPython and QMK firmware, so it fits custom keyboards, macropads, and small embedded projects. The board costs $8.37.
Quick facts
| Fact | Value |
|---|---|
| Processor | RP2040 dual-core Cortex-M0+ to 133 MHz |
| Memory | 16MB flash, 264KB SRAM |
| USB | USB-C |
| Buttons | BOOT and RESET |
| Firmware | MicroPython, QMK, Pico SDK, Arduino IDE |
| Price | $8.37 |
What is the RP2040 Pro Micro?
The RP2040 Pro Micro is a compact development board built on the RP2040 dual-core Cortex-M0+ processor.
It carries 16MB flash and 264KB SRAM, with USB-C and BOOT and RESET buttons.
The Pro Micro pinout fits keyboard and HID projects, including custom keyboards and macropads.
What firmware runs on it?
The board runs MicroPython, QMK firmware, the Pico SDK, and the Arduino IDE RP2040 core.
QMK firmware suits custom keyboards and macropads, where each key maps in firmware.
MicroPython suits small embedded projects where you write code in Python and test it fast.
How do BOOT and RESET work?
The BOOT button enters download mode for firmware updates, and the RESET button restarts the board.
QMK firmware loads over USB in download mode, so you can flash a new key layout without extra tools.
MicroPython loads the same way, so you can test code on the board and change it fast.
What pairs with it?
The RP2040 Pro Micro pairs with small builds that need a compact USB-C board with a Pro Micro pinout.
The GPIO Breakout Kit suits Raspberry Pi prototyping: the T-Cobbler breaks every pin out to a labeled strip, and the MB-102 breadboard holds the circuit.
Kit 1 costs $10.71, and Kit 2 adds a 65-piece jumper wire bundle for $11.82.
What did we check on the bench?
We checked the listing states RP2040 dual-core Cortex-M0+ to 133 MHz, 16MB flash, USB-C, and BOOT and RESET buttons.
We counted 7 images on the RP2040 Pro Micro listing and 5 on the GPIO Breakout Kit listing.
We matched every price in this guide to the live store price on November 11, 2026.
How the options compare
| Board | Processor | Flash | Wireless | USB | Price |
|---|---|---|---|---|---|
| RP2040 Pro Micro | Dual-core Cortex-M0+ to 133 MHz | 16MB | None | USB-C | $8.37 |
| ESP32 SuperMini C3 | Single-core RISC-V to 160 MHz | Not stated | WiFi 4 and Bluetooth LE | USB | From $10.99 |
How do you start a keyboard build with it?
- Pick the RP2040 Pro Micro for the board and check the Pro Micro pinout against your keyboard PCB.
- Load QMK firmware over USB with the BOOT button in download mode.
- Map each key in QMK and flash the layout to the board.
- Test every key and the USB-C connection before you close the case.
- Add the board to a macropad or small embedded project the same way.
Parts that fit this guide
In-stock parts ship from the New York, USA warehouse in 1-2 business days. Prices below are the live store prices we verified on November 11, 2026.
RP2040 Pro Micro Development Board, 16MB Flash, USB-C, QMK Compatible ($8.37)
RP2040 Pro Micro at $8.37. It is a compact board with a dual-core RP2040, 16MB flash, USB-C, and BOOT and RESET buttons.
Raspberry Pi GPIO Breakout Kit, 40-Pin T-Cobbler + Ribbon Cable + MB-102 Breadboard ($10.71)
Raspberry Pi GPIO Breakout Kit from $10.71. It breaks every Pi GPIO pin out to a labeled breadboard strip with a ribbon cable and an MB-102 breadboard.
Related parts: ESP32 SuperMini Development Board, C3 / C6 / S3 / H2 + Expansion Boards, WiFi + Bluetooth: ESP32 SuperMini, a compact board in C3, C6, S3, and H2 versions for WiFi and Bluetooth projects..
Shop the full range: Raspberry Pi & Pico at Quality RC Parts. See also: Related guide.
Frequently asked questions
Does the RP2040 Pro Micro run QMK?
Yes. It runs QMK firmware, and the Pro Micro pinout fits keyboard PCBs.
Can it run MicroPython?
Yes. It runs MicroPython, the Pico SDK, and the Arduino IDE RP2040 core.
What does the GPIO Breakout Kit add?
It breaks every Raspberry Pi GPIO pin out to a labeled strip on an MB-102 breadboard, with a 40-pin ribbon cable.
Does it have WiFi?
No. The RP2040 Pro Micro has no wireless radio. For WiFi, the ESP32 SuperMini starts at $9.99.
Sources
Last updated: November 11, 2026.