Development Boards / Metro

Top view of the Adafruit Metro development board

The Adafruit METRO is an Arduino Uno equivalent board designed with a few extra features to improve upon the original Uno. We sure love the ATmega328, and we use it a lot for our own projects. The processor has plenty of GPIO, analog inputs, hardware UART, SPI and I2C, timers, and PWM galore. All the hardware you need for most simple projects. When we need to go small, we use a Metro Mini which crams all that Metro goodness into a breadboard-friendly stick. For more advanced projects, we upgrade to the Metro M0 Express, it is shield compatible and comes with a massive memory and speed upgrade and even runs CircuitPython. With Express you'll get where you're going even faster!

Overhead shot of long skinny black microcontroller connected to an OLED screen and a temperature-and-humidity sensor. The sensor data displays on the OLED.

Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz - STEMMA QT / Qwiic

Product ID: 2590

One of our star development boards is the Adafruit METRO Mini 328, an excellent lil fellow that lets you make your Arduino-based project tiny. Recently we had to redesign this board to move from the obsolete CP2104 to the available CP2102N, and one thing led to another, and before you know it we made a completely refreshed design: the Adafruit METRO Mini 328 V2. The...

$14.95

In stock

Angled shot of black and white microcontroller.

Adafruit METRO 328 - Arduino Compatible - with Headers - ATmega328

Product ID: 2488

This is the Adafruit METRO Arduino-Compatible - with headers. It's a fully assembled and tested microcontroller and physical computing board with through-hole headers attached. If you don't want a Metro with the headers attached for super-slimness, check out our Metro without Headers. The METRO works great with the Arduino IDE, and runs the ATmega328P at 16MHz so it...

$17.50

In stock

Angled shot of a Adafruit METRO M0 Express - designed for CircuitPython.

Adafruit METRO M0 Express - designed for CircuitPython - ATSAMD21G18

Product ID: 3505

Metro is our series of microcontroller boards for use with the Arduino IDE. This new Metro M0 Express board looks a whole lot like our original Metro 328, but with a huge upgrade. Instead of the ATmega328, this Metro features a ATSAMD21G18 chip, an ARM Cortex M0+. At the Metro M0's heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic,...

$24.95

In stock

Angled shot of black, credit-card-sized dev board.

Adafruit Metro ESP32-S3 with 16 MB Flash 8 MB PSRAM

Product ID: 5500

What's Metro-shaped and has an ESP32-S3 WiFi module? What has a STEMMA QT connector for I2C devices and a Lipoly charger circuit? What has your favorite Espressif WiFi microcontroller and lots of memory for your next IoT project? That's right - it's the new Adafruit Metro ESP32-S3! With native USB and a load of octal PSRAM, this board is perfect for use with...

$24.95

24 in stock

Angled shot of black, credit-card-sized development board.

Adafruit Metro RP2040

Product ID: 5786

Choo! Choo! This is the RP2040 Metro Line, making all station stops at "Dual Cortex M0+ mountain", "264K RAM round-about" and "16 Megabytes of Flash town". This train is piled high with hardware that complements the Raspberry Pi RP2040 chip to make it an excellent development board for projects that want Arduino-shape-compatibility or just need the extra space and...

$14.95

85 in stock

Adafruit Metro M4 feat. Microchip ATSAMD51

Product ID: 3382

Are you ready? Really ready? Cause here comes the fastest, most powerful Metro ever. The Adafruit Metro M4 featuring the Microchip ATSAMD51. This Metro is like a bullet train, with its 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset....

$27.50

In stock

Adafruit Grand Central M4 Express featuring the SAMD51

Product ID: 4064

Are you ready? Really ready? Cause here comes the Adafruit Grand Central featuring the Microchip ATSAMD51. This dev board is so big, it's not named after a Metro train, it's a whole freakin' station! This board is like a freight train, with its 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for...

$39.95

In stock

Adafruit Metro ESP32-S2

Product ID: 4775

What's Metro shaped and has an ESP32-S2 WiFi module? What has a STEMMA QT connector for I2C devices, and a Lipoly charger circuit? What has your favorite Espressif WiFi microcontroller and lots of memory for your next IoT project? That's right - its the new Adafruit Metro ESP32-S2! With native USB and a load of PSRAM this board is perfect for use with CircuitPython...

$22.50

In stock

Adafruit Grand Central M4 Express featuring SAMD51 - Without Headers

Product ID: 4084

$29.95

In stock

Plastic Translucent Enclosure for Metro or Arduino with Metro installed

Plastic Translucent Enclosure for Metro or Arduino - LEGO Compatible

Product ID: 4490

This simple but effective enclosure will fit any 'classic Arduino' shaped development board - we've tested it with the Arduino UNO R3, Adafruit Metro, and Adafruit Metro M4 Express. We rather like this case because it's low-profile enough that you can fit shields on top. There's even a flexi-nub for pressing the reset button! Best of all, it's LEGO brick compatible!...

$4.95

40 in stock

Angled shot of red credit-card sized microcontroller.

Adafruit Metro M7 with microSD - Featuring NXP iMX RT1011

Product ID: 5600

Your favorite electronics companies have collaborated to make the fastest Metro ever! For this new product, DigiKey, NXP and Adafruit all contributed the stuff the stuff they know best: shipping parts fast (DigiKey), designing microcontrollers (NXP) and crafting great products with tutorials (that's us, Adafruit!) We teamed up to present to you the Adafruit Metro M7...

$19.95

In stock

Adafruit MetroX Classic Kit - Experimentation Kit for Metro 328

Product ID: 3588

Interested in making neat stuff with an Arduino-compatible board but not sure where to start? This kit includes all the pieces needed to complete over 20 different circuit and projects. Basically everything you need to be playing within minutes of its arrival. No soldering required, works with Mac, Windows and Linux! This item is the same exact kit as...

$84.95

10 in stock

Adafruit Metro M7 with AirLift - Featuring NXP iMX RT1011

Product ID: 4950

Get ready for our fastest Metro ever - the NXP iMX RT1011 microcontroller powers this board with a 500 MHz ARM Cortex M7 processor. There's 8 MB of execute-in-place QSPI for firmware + disk storage and 128KB of SRAM in-chip, plus a WiFi co-processor using an on-board ESP32 module. The iMX series of chips is the fastest microcontrollers around, with a Cortex M7...

$29.95

29 in stock

Adafruit Metro 328 Starter Pack

Product ID: 3345

Heard about Arduino IDE-compatibles but not sure how to start? The Adafruit Metro is an ATmega328-based (like a lot of our own products) development board. Since it is shaped the same, and code/shield-compatible with the Arduino UNO R3 design, our Adafruit Metro is easy to use and hacker friendly and this is the perfect beginner kit for learning how to use the...

$44.95

17 in stock

Angled shot of a Adafruit METRO 328 Fully Assembled

Adafruit METRO 328 Fully Assembled - Arduino IDE compatible - ATmega328

Product ID: 50

We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Metro Mini or a Trinket M0, but when size isn't as much of a concern, we reach for an Adafruit METRO. New!...

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$17.50

Out of stock

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Adafruit MetroX Classic Kit - Experimentation Kit for Metro 328

Product ID: 170

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$84.95

Out of stock

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Angled shot of a Adafruit METRO 328 without Headers.

Adafruit METRO 328 without Headers - ATmega328

Product ID: 2466

We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Metro Mini, but when size isn't as much of a concern, and a USB-serial converter is required, we reach for...

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Discontinued

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Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz - STEMMA QT / Qwiic

Product ID: 5597

Now available here! One of our star development boards is the Adafruit METRO Mini 328, an excellent lil fellow that lets you make your Arduino-based project tiny. Recently we had to redesign this board to move from the obsolete CP2104 to the available CP2102N and one thing led to another and before you know it we made a completely refreshed design: the Adafruit METRO...

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Discontinued

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