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Best RP2040 Boards 2021

Best RP2040 Boards
(Image credit: Tom's Hardware)

While Raspberry Pi boards have been around since 2012, they have been powered by Broadcom SoCs and the first Raspberry Pi silicon, the RP2040, just launched in January 2021. With two Arm Cortex M0+ cores running at 133 MHz, 264KB of RAM and up to 16MB of Flash, these chips enable a whole ecosystem of microcontrollers that compete more closely with traditional Arduino boards than a Raspberry Pi 4.

While Raspberry Pi has its own RP2040-powered board in the Raspberry Pi Pico, there are now more than a dozen, third-party solutions that offer improvements which range from smaller sizes to built-in Wi-Fi, more storage or a lot of additional outputs. There are even RP2040-powered keypads.

To help you choose, we’ve listed the best RP2040 boards below. These boards can be used for everything from general learning to building Wi-Fi connected robots to implementing basic A.I. 

Shopping Tips for RP2040 Boards 

  • What size / pins do you need?  Smaller RP2040 boards like the Pimoroni Tiny RP2040 have fewer than the standard 40 pins, but can fit in narrower projects.
  • Do you need wireless? Right now there is only one board, the Arduino Nano RP2040 Connect, which comes with Wi-Fi and Bluetooth built-in, but you can add these using add-ons such as Adafruit’s Airlift board or Pimoroni’s Pico Wireless Pack.
  • Choose your ecosystem: The pinouts of different RP2040 boards may align with different add-ons. For example, Adafruit’s Feather RP2040 is compatible with around two dozen different FeatherWing, including those which offer wireless connectivity while the Pico itself connects directly to Pimroni’s “packs."
  • Specialist connectors such as Stemma QT, Qwiic and Grove are desirable extra features for those that want simple and neat electronics projects. The Pico doesn’t come with any of these, but many third-party boards do. The simplicity of these connections belies the choice of sensors and components offered.

The Best Raspberry Pi RP2040 Boards You Can Buy Today 

(Image credit: Tom's Hardware)

1. Raspberry Pi Pico

$4 Dual core Arm microcontroller

Low cost
Small size
Ease of use
Built-in ADC
No USB-C
Only three ADC pins

The original and least expensive RP2040 board, the Raspberry Pi PIco costs just $4 and has a full 40-pin GPIO. Because it’s the standard, there are a lot of add-on boards that are made to connect to its pins specifically, such as the Kitronik Robotics Board or Pimoroni’s pack ecosystem which has a wireless pack, an LED pack and many others.

Of course, for the cheapest model, you have to make a few compromises. First, you have only three analog-to-digital pins where many of the third-party boards have four or more. That means that you can only use up to three potentiometers and 1.5 analog joysticks. It also has only 2MB of storage, which is the bare minimum, though more-than-adequate for most coding. 

Another trade-off is that the Pico uses a micro USB connector rather than a more-advanced USB-C connector. However, given the low cost and strong support ecosystem, the Raspberry Pi Pico is a must-have.

Read: Raspberry Pi Pico Review

(Image credit: Tom's Hardware)

2. Adafruit Feather RP2040

The Gold Standard of ‘Pi Silicon’

Great form factor
STEMMA QT easy to use
FeatherWing add-ons
Onboard battery connection and charging
Pin labelling on both sides of the board
No pull up resistors on I2C pins
No battery monitoring

Adafruit, partners in the RP2040 project have released many great RP2040 boards in a short space of time. The company has its own ecosystem of form factors and its largest, the Feather, is where we saw their first RP2040 system. Designed to take advantage of an expansive range of add-ons called “FeatherWings”, the Feather RP2040 has fewer pins than a typical Raspberry Pi Pico, but the choice of pins is curated to give us the best that the RP2040 can offer.

What we lose in GPIO pins we gain in onboard LiPo / Li-Ion battery charging, great pin labeling and Stemma QT, Adafruit’s connector of choice for components that connect using I2C. With Stemma QT we have none of the messy wiring and polarity issues, enabling us to focus on the project and not our wiring.

If you’re looking for the most versatile RP2040 board on the market, look no further. Sure, we pay a premium over the Raspberry Pi Pico, but the Adafruit Feather RP2040 is a refined product that is ready to drop into your next project.

Read: Adafruit Feather RP2040 Review

(Image credit: Tom's Hardware)

3. Cytron Maker Pi Pico

The ideal way to build your Raspberry Pi Pico projects

Low cost
Easy to use
Lots of extra features
Inline LEDs
Grove connectors
ESP-01 needs extra work 

The Raspberry Pi Pico is a fun and inexpensive way to get into coding and electronics. After buying a Pico, we need to also buy extra components to expand its scope and this can become costly and complicated. The Maker Pi Pico crams a lot of extra functions into a small package all for less than $10, including a pre-soldered Raspberry Pi Pico.

For $10, the sheer amount of features is amazing. We have a micro SD card reader, buzzer / 3.6mm audio jack, NeoPixel, all of the GPIO pins broken out for use and we have six Grove connectors for use with compatible components. Each of the GPIO pins has a useful LED that can be used to quickly debug an issue. The included ESP-01 header enables basic Wi-Fi access and, since we wrote our review, Cytron has released an updated guide on how to get the Maker Pi Pico connected to wireless. For $10 this board is hard to beat!

Read: Cytron Maker Pi Pico Review 

(Image credit: Tom's Hardware)

4. Adafruit QT Py RP2040

A tiny board for great projects

Small size
Stemma QT Port
USB-C
Lack of GPIO pins 

Adafruit’s QT Py RP2040 is similar to Pimoroni’s Tiny 2040. We have the RP2040 squeezed into the smallest package and we have a curated selection of GPIO pins for our projects. Adafruit’s QTPy RP2040 has castellated edges, designed to surface mount the board into a project and it features a Stemma QT / Qwiic connector which breaks out an additional I2C connection for use with Stemma QT / Qwiic compatible components, a useful and tidy solution for rapid prototyping.

The low cost and ease of use afforded by the QTPy RP2040 is amplified by Adafruit’s MicroPython fork, CircuitPython, which has many libraries of code for use with Stemma QT / Qwiic components. Even if you already own a Raspberry Pi Pico, the QTPy RP2040 should still be part of your project box.

Read: Adafruit QT Py RP2040 Review  

(Image credit: Tom's Hardware)

5. Pimoroni Tiny 2040

First third-party, RP2040 board offers features the Pico doesn’t have.

Small size
More ADC pins than Pico
Built-in reset button
Pin IDs printed on top
Tricky to surface mount
Incompatible with Pico add-on boards
Premium price

Pimoroni’s Tiny 2040 is a mere third of the size of a Raspberry Pi Pico, yet it packs the full power of the Pico’s RP2040 SoC, a curated selection of GPIO pins including an additional analog input. The reduction in size has seen an increase in price, around three times the price of a stock Pico ($12 vs $4) but there is always a premium for compact design.

The Pimoroni Tiny 2040 is not for all projects. Its bottom-facing SoC poses a challenge for mounting it in projects and its unique pin layout means that it won’t work with the ecosystem of packs, aka add-on boards, that are designed to plug into the original Pico. However, if you are building your own project that doesn’t require these add-ons and need a more compact board that packs on extra features, the Tiny 2040 is a fantastic choice.

Read: Pimoroni Tiny 2040 Review 

(Image credit: Tom's Hardware)

6. Pimoroni Pico Lipo

Pico Pinout with Plenty of Extras

Identical Pico pinout
Battery charging
Stemma QT / Qwiic connector
Large flash memory
USB C
Costs much more than a Pico 

Many of the Raspberry Pi Pico alternatives have one thing in common, they lack the full set of GPIO pins found on the Pico. Pimoroni’s Pico LiPo is a drop-in replacement for the Raspberry Pi Pico that provides all of the GPIO pins found on a Pico, with added bonus of onboard LiPo / Li-Ion charging and a Stemma QT / Qwiic connector. 

Pico LiPo does cost more than three times the price of a standard Pico, but with these extra features in the same form factor we can justify spending the extra money. If you are planning to build embedded / mobile projects or wish to try out the Stemma QT / Qwiic components ecosystem, then Pico LiPo is a serious contender for your attention.

Read: Pimoroni Pico LiPo Review 

(Image credit: Tom's Hardware)

7. Arduino Nano RP2040 Connect

An Arduino with the heart of a Pi

Small form factor
Lots of analog inputs
Built-in Wi-Fi and BLE
Pin numbers hidden away
High Cost
No USB-C
Software is a little buggy

Arduino’s first RP2040 powered board may be the last of the first wave of partner boards, but it is safe to say that it is the most anticipated. The Arduino Nano RP2040 Connect is the only RP2040 based board to come with onboard Wi-Fi, the same Wi-Fi as used in Arduino’s Nano 33 IoT and given that these two boards share the same pinout and form factor, the RP2040 is a drop in replacement.

The Arduino Nano RP2040 Connect is not just a “one trick pony” it also comes with an LSM6DSOXTR Inertial Measurement Unit, capable of measuring orientation, inertial forces and gestures, and the board also features a microphone for simple voice / audio input. The Arduino Nano RP2040 Connect is compatible with CircuitPython, MicroPython and C, but being an Arduino product the greatest compatibility and support is found in their IDE.

However, for a board this expensive, it is annoying that it lacks USB-C and our initial experience programming it was a challenge because of some bugs. And the initial documentation from Arduino on how to program it has been very poor.

Read: Arduino Nano RP2040 Connect Review 

(Image credit: Tom's Hardware)

8. Adafruit ItsyBitsy RP2040

A Surprising Compromise

More pins than a QT Py, but not a full complement
User programmable BOOT button
Same price as QT Py RP2040
No Stemma QT 

Adafruit’s ItsyBitsy RP2040 is the middle child between the larger Feather RP2040 and the smaller QTPy RP2040. The board is a compromise; we have more pins than the QT Py RP2040, a user programmable button, and it is the same price as the QT Py RP2040. What we lose is a Stemma QT connector. Not a great loss, but the feature is nice to have.

The board resembles an Arduino Nano layout but it lacks the castellated edges found on other boards, so no surface mount soldering for this board. On the up side, we have 30 GPIO pins around the board and given that this board is still rather small, that is quite the achievement. ItsyBitsy RP2040 is the ideal board to be hidden away in a project, getting the job done with little fanfare.

Read: Adafruit ItsyBitsy RP2040 Review 

(Image credit: Tom's Hardware)

9. Pimoroni Keybow 2040

Programmable Keyboard with Pi Silicon Inside

Ease of use
Compact size
Clicky Keys
Pricey
Lacks MicroPython support

Pimoroni’s Keybow 2040 is something special in the RP2040 range: a programmable 16-key keypad, powered by the RP2040. This isn’t a board that you use to build a project, rather it is something that we integrate into a project. With 16 mechanical keys, each with an addressable NeoPixel LED we can build the Keybow 2040 into our daily workflow.

The board ships with Pimoroni’s fork of MicroPython with modules to use Keybow 2040, but you will only get the best from this board via Adafruit’s CircuitPython and its USB HID module. Using this we can assign keypresses, media keys and mouse movements to any of the keys, making short work of tedious tasks.

Read: Pimoroni Keybow 2040 Review 

(Image credit: Tom's Hardware)

10. Sparkfun Pro Micro

All the features you need without wasting a millimeter

Qwiic connector
Great choice of GPIO
Small size
Castellated edges
Only one I2C channel 

The $10 SparkFun Pro Micro RP2040 is the cheapest model in SparkFun’s range and follows a classic design that resembles an Arduino Nano board layout which is at home in a breadboard and embedded into your projects. We have fewer GPIO pins than a Pico, but more than Adafruit’s QTPy RP2040 while retaining a small layout.

SparkFun’s Qwiic connector, compatible with Adafruit’s Stemma QT, enables us to use many of the compatible components such as sensors and displays with the Pro Micro and for $10 this is a Swiss Army Knife of a board that provides a cost effective and multi-purpose means to explore the RP2040 ecosystem.

Read: SparkFun Pro Micro RP2040 Review