The RP2040 Pro Micro at $8.37 pairs a dual-core Cortex-M0+ chip with 16MB flash and USB-C. It runs MicroPython, QMK, the Pico SDK, and the Arduino IDE RP2040 core. The Pro Micro pinout fits keyboards and small builds, with Boot and Reset buttons on board. Pair it with a GPIO breakout kit from $10.71 for bench wiring.
What chip sits on the board?
The RP2040 runs dual Cortex-M0+ cores at up to 133 MHz, with 264KB of SRAM.
The board carries 16MB of flash, so firmware and files fit with room left.
USB-C handles power and data, with Boot and Reset buttons on board.
What firmware can it run?
It runs MicroPython, QMK, the Pico SDK, and the Arduino IDE RP2040 core.
QMK suits keyboards, MicroPython suits quick scripts, and the SDK suits C builds.
Pick the firmware for the project, since the 16MB board takes all four.
Why does the Pro Micro pinout matter?
The Pro Micro pinout matches a common keyboard controller footprint, so the 16MB board drops into existing designs.
The same pinout suits small builds that need a compact USB-C controller.
Check the pin labels against your wiring before you solder the board in.
What pairs with it on the bench?
The GPIO breakout kit from $10.71 adds a 40-pin T-Cobbler, a ribbon cable, and a breadboard.
Kit 2 at $11.82 adds a 65-piece jumper wire bundle to the same kit.
Every pin on the T-board carries a label, so wiring stays readable.
What did we check on the bench?
We matched the 16MB flash, the USB-C port, and the dual-core chip to the listing.
We matched the 40-pin cable and the labeled T-board to the breakout kit listing.
We counted 7 images on the Pro Micro listing and 5 on the breakout kit listing.
Quick comparison
| Board | Chip | Flash | USB | Price |
|---|---|---|---|---|
| RP2040 Pro Micro | RP2040 dual-core | 16MB | USB-C | $8.37 |
| ESP32 SuperMini | C3/S3/C6/H2 | Not stated | USB | from $9.99 |
Steps
- Pick the firmware for the project: QMK, MicroPython, SDK, or Arduino.
- Hold the Boot button, press Reset, and release to enter bootloader mode.
- Flash the firmware over USB-C.
- Check the pin labels against your wiring.
- Test the build before you close the case.
Frequently asked questions
Does it fit a Pro Micro footprint?
Yes. The board uses the Pro Micro pinout, so it fits designs made for that footprint. Check the pin labels on your design before you solder.
How much flash does it have?
It carries 16MB of flash. That leaves room for firmware, files, and QMK keymaps on one board.
Can I use it without a keyboard?
Yes. The board suits any small build that needs a compact USB-C controller. MicroPython and the Arduino core cover non-keyboard projects.
What is in the breakout kit?
Kit 1 holds a T-Cobbler, a breadboard, and a 40-pin ribbon cable. Kit 2 adds a 65-piece jumper wire bundle.
Parts used
RP2040 Pro Micro Development Board, 16MB Flash, USB-C, QMK Compatible, $8.37
Raspberry Pi GPIO Breakout Kit, 40-Pin T-Cobbler + Ribbon Cable + MB-102 Breadboard, $10.71
ESP32 SuperMini Development Board, C3 / C6 / S3 / H2 + Expansion Boards, WiFi + Bluetooth, $9.99
Related buying guides on Quality RC Parts
RP2040 Pro Micro for Keyboards and Small Builds Guide
Which ESP32 Board to Pick: DevKit V1, S2 Mini, or SuperMini
TFT LCD Displays for Arduino and ESP32 Projects Guide
Browse all the guides on the Quality RC Parts Drone Guides hub, or start at the Quality RC Parts store.
Sources
Quality RC Parts stocks parts in New York, USA and ships in-stock orders in 1-2 business days.
Last updated: 2026-11-11.