Adafruit
Adafruit Metro M4 feat. Microchip ATSAMD51
Best high-performance controller for advanced hobbyist electronics projects.
Unleash powerful performance with the Adafruit Metro M4, featuring the Microchip ATSAMD51 Cortex M4 processor running at a swift 120 MHz. This development board offers ample 512KB flash and 192KB RAM, operating at a reliable 3.3V logic. It boasts dual 1 MSPS DACs and ADCs, alongside six hardware SERCOMs for versatile I2C, SPI, or UART communication. With 22 PWM outputs and native USB support, it's perfect for intricate projects. The integrated 2MB QSPI flash storage and UF2 bootloader simplify reprogramming, making it an excellent choice for advanced development.
$27.50
Owner Satisfaction
4.7
/ 5
Category Rank
15
/ 1543
#15 in Development Boards
Price vs Category Average
-69%
Below average
Dimensions
72.054.015.0
/ mm x mm x mm
Who it's for
- Developers building complex, high-speed computational projects
- Python enthusiasts seeking rapid prototyping and easy coding
- Makers leveraging existing Arduino shield ecosystems
Who should skip it
- Budget-conscious hobbyists working on simple, low-cost builds
- Engineers designing long-term, battery-powered remote devices
- Beginners needing only basic I/O for simple tasks
Performance breakdown
Processing Speed
The 120MHz clock handles complex calculations with impressive, snappy efficiency.
Connectivity Versatility
Six hardware SERCOMs provide exceptional flexibility for diverse peripheral communication.
Programming Accessibility
The UF2 bootloader makes code deployment seamless for developers of all levels.
Expansion Compatibility
Arduino shield compatibility opens the door to a massive ecosystem of add-ons.
Storage Capacity
Integrated 2MB QSPI flash offers plenty of room for data-heavy projects.
Analog Precision
Dual 1 MSPS DACs and ADCs deliver high-fidelity signal processing capabilities.
Key Specs
Dimensions
72.0mm x 54.0mm x 15.0mm
Weight
20.6g
Processor
Microchip ATSAMD51J19, Cortex M4 @ 120 MHz
Memory
512 KB Flash, 192 KB RAM
Power Input
7-9V DC or 5V USB
Logic Level
3.3V
Onboard Storage
2MB QSPI Flash
GPIO Pins
25 total pins
Features
- High-speed 120MHz Cortex M4 processor
- Native USB for easy connectivity
- Ample onboard QSPI flash storage
- Simple reprogramming with UF2 bootloader
- Arduino shield compatible layout
- Multiple hardware serial interfaces
- Onboard LEDs and NeoPixel
- Integrated crypto engines
What customers say
Customers overwhelmingly praise the Adafruit Metro M4 for its significant performance boost over older microcontrollers. The fast Cortex M4 processor makes it ideal for demanding tasks like data logging and audio processing. A key strength is the seamless integration with CircuitPython, which simplifies rapid prototyping while still supporting C++ development. Reviewers consistently highlight Adafruit's robust build quality, clear labeling, and reliable power management. Its Arduino Uno form factor allows easy use of existing shields. While priced higher, users find the superior hardware, documentation, and community support justify the cost. The Metro M4 is celebrated as a high-quality, high-performance board bridging beginner accessibility with professional embedded needs.
Know before you buy
Yes, the board features an Arduino-compatible layout, allowing you to use most standard shields. However, keep in mind that the Metro M4 operates at 3.3V logic, so ensure your shields are compatible with this voltage level to avoid damaging the board.
The board uses a UF2 bootloader, which makes programming straightforward. Once connected via USB, the board appears as a removable disk drive on your computer, and you simply drag and drop your compiled code file onto it.
Absolutely. With its 120 MHz Cortex M4 processor, 192KB of RAM, and 2MB of QSPI flash storage, it is well-suited for demanding tasks like signal processing, complex sensor data logging, or driving high-resolution displays.
You can power the Metro M4 through the micro-USB port using 5V or via the DC barrel jack, which accepts a 7-9V DC input. This flexibility makes it easy to power the board from a computer or a dedicated wall adapter.
Yes, it is equipped with 8 analog inputs and 2 true analog outputs (DACs). This makes it a strong choice for projects involving audio synthesis, precision sensor readings, or analog signal generation.
The Metro M4 is primarily designed for use with the Arduino IDE. Its native USB support and robust hardware make it a reliable platform for developing and testing complex firmware.
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