Adafruit METRO M0 Express - designed for CircuitPython - ATSAMD21G18

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SKU: ADA3505 Brand: Adafruit Guides (1)
Metro is Adafruit's series of microcontroller boards for use with the Arduino IDE. This new Metro M0 Express board looks a whole lot like Adafruit's original Metro 328, but with...
$52.35 AUD, inc GST
$47.59 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Thu, 25th of Jul

Quantity Discounts:

  • 6-12 $45.69 (exc GST)
  • 12+ $44.26 (exc GST)
- +

1 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

Shipping:

  • $6+ Standard (5+ days*, tracked)
  • $10+ Express (2+ days*, tracked)
  • FREE Pickup (Newcastle only - must order online*)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

Metro is Adafruit's 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+. It's Adafruit's first Metro that is designed for use with CircuitPython! CircuitPython is Adafruit's beginner-oriented flavor of MicroPython - and as the name hints at, its a small but full-featured version of the popular Python programming language specifically for use with circuitry and electronics.

Not only can you use CircuitPython, but the Metro M0 is also usable in the Arduino IDE.

At the Metro M0's heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip.

  • Power the METRO with 7-9V polarity protected DC or the micro USB connector to any 5V USB source. The 2.1mm DC jack has an on/off switch next to it so you can turn off your setup easily. The METRO will automagically switch between USB and DC.
  • METRO has 25 GPIO pins, 12 of which are analog in, and one of which is a true analog out. There's a hardware SPI port, hardware I2C port and hardware UART. Logic level is 3.3V
  • Native USB, there's no need for a hardware USB to Serial converter as the Metro M0 has built in USB support. When used to act like a serial device, the USB interface can be used by any computer to listen/send data to the METRO, and can also be used to launch and update code via the bootloader. It can also act like a keyboard, mouse or MIDI device as well.
  • Four indicator LEDs and one NeoPixel, on the front edge of the PCB, for easy debugging. One green power LED, two RX/TX LEDs for data being sent over USB, and a red LED connected. Next to the reset button there is an RGB NeoPixel that can be used for any purpose.
  • 2 MB SPI Flash storage chip is included on board. You can use the SPI Flash storage like a very tiny hard drive. When used in Circuit Python, the 2 MB flash acts as storage for all your scripts, libraries and files. When used in Arduino, you can read/write files to it, like a little datalogger or SD card, and then with Adafruit's helper program, access the files over USB.
  • Easy reprogramming, comes pre-loaded with the UF2 bootloader, which looks like a USB storage key. Simply drag firmware on to program, no special tools or drivers needed! It can be used to load up CircuitPython, PXT MakeCode or Arduino IDE (it is bossa-compatible)

Comes fully assembled with headers, tested, and with the UF2 bootloader loaded on. They also include 4 rubber bumpers to keep it from slipping off your desk. No soldering required to use, plug and play!

Check out Adafruit's full guide for pinouts, schematics, drivers, instructions, Fritzing object, and more!

Please note, CircuitPython is still in beta and Adafruit are working hard to make it awesome! So please pick up an M0 Express if you want to try it out - maybe even help Adafruit find bugs and make improvements! You can of course use the Metro M0 in Arduino IDE as much as you like, which is well supported.

Technical Details

Detailed specifications:

  • ATSAMD21G18 @ 48MHz with 3.3V logic/power
  • 256KB of FLASH + 32KB of RAM
  • 2 MB SPI Flash chip
  • No EEPROM
  • 32.768 KHz crystal for clock generation & RTC
  • 3.3V regulator with 500mA peak current output
  • USB native support, comes with USB bootloader and serial port debugging
  • You also get tons of pins - 25 GPIO pins, 5 more than the Metro 328
  • Hardware Serial, hardware I2C, hardware SPI support
  • PWM outputs on almost all pins
  • 6 x 12-bit analog inputs
  • 1 x 10-bit analog output (DAC)
  • Built in NeoPixel on pin #40
  • Pin #13 red LED for general purpose blinking
  • Power on/off switch
  • 4 mounting holes
  • They also include 4 rubber bumpers to keep it from slipping off your desk
  • Reset button
  • Adafruit Black PCB with gold plate on pads
  • Dimensions: 71mm x 53mm / 2.8" x 2.1"
  • Height (w/ barrel jack): 13mm / 0.5"
  • Weight: 20g

Product Comments

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

  • $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
  • $6+ for Standard Post (typically 6+ business days, tracked)
  • $10+ for Express Post (typically 2+ business days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11+ for Pack and Track (3+ days, tracked)
  • $16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!

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