Metro Express M0 32-bit, compatible with Arduino and CircuitPython, Adafruit 3505

Brand: Adafruit
Product Code: AN-09079
Availability: 3-5 business days
Planned delivery date after ordering: 2023-02-07
Ex Tax: 36.53€


The module is compatible with Arduino, based on the ATSAMD21G18 system. Designed to use with CircuitPython, a program that connects Python language with microcontrollers. It has 25 digital inputs/outputs, 20 PWM channels, 12 analog inputs, as well as popular communication interfaces. This version works with a voltage of 3.3 V, it has a microUSB connector for programming.


  • ATSAMD21G18 ARM Cortex M0+ 3.3 V microcontroller:
    • Flash memory: 256 KB
    • SRAM: 32 KB
    • Clock frequency: internal oscillator 48 MHz
  • Flash memory: additional 2 MB chip
  • Installed Arduino bootloader
  • Works with a modified version of the Arduino IDE
  • MicroUSB connector for programming
  • Installed 3.3 V voltage regulator with current delivery of up to 500 mA
  • Built-in oscillator 32.768 kHz
  • 25 GPIO pins
  • 20 PWM pins
  • 6 analog inputs
  • 1x analog output
  • Serial interfaces: UART, SPI, I2C
  • Built-in NeoPixel on pin #40
  • External interrupts
  • Connector: microUSB connector (cable sold separately)
  • Soldered ISP connector
  • Dimensions: 53 x 71 mm
  • Weight: approx. 20g

Useful links:
Manufacturer website

Claim orders from Stores

You can claim your purchased items within 1 - 4 work days after making an order (if product is in local warehouse).

Please wait for an email notification regarding Your order status update.

Vilnius Store address: Vytenio g. 20, LT-03229 Vilnius, Lietuva

Kaunas Store address: Pramonės pr. 4D, LT-51329, Kaunas, Lietuva

Local delivery

Purchased items are delivered locally through Venipak service. Depending on availability of items, orders are processed within 1-3 work days. Orders made until 1AM are shipped the same day.

Local delivery  (1-2 w.d.) price for items of any size is through through courier service is 4.50€ (incl. VAT). 

Local delivery price to Venipak parcel terminals (1-3w.d.) is 2.50€ incl. VAT.

Local delivery price to Omniva parcel terminals (1-3w.d.) is 3.50€ incl. VAT.

Payment on delivery +2.00€ (incl. VAT).

You can pay for the goods at the time of delivery to the courier in cash or by credit card. Payment to Omniva parcel terminals is only possible by bank card.

International delivery pricing through courier service

International shipping prices depend on geographic location:

Latvia - 5.50€ (incl. VAT)

Estonia - 6.50€ (incl. VAT)

other - negiotiated individually.

International delivery pricing to Omniva parcel terminals

Latvia - 6.00€ (incl. VAT)

Estonia - 8.50€ (incl. VAT)


We accept payments via PayPal for orders over 20€.

Paid orders of more than 100€ are shipped for free to Baltic countries.

Product availability status:

Vilnius Store In Stock - the product is at the store, Vytenio str. 20 in Vilnius and can be picked up / purchased the same day;

Kaunas Store In Stock - the product is at the store, Pramonės pr. 4D in Kaunas and can be picked up / purchased the same day;

Central Warehouse In Stock - In stock, product will be shipped in a short time 1-2 work days, there is no possibility to pickup on the spot;

1-2 work days - product will be shipped in a short time - 1-2 business days;

1-2 work days – we don’t have selected product in stock. Shipping time is only 1-2 work days;

3-5 work days – we don’t have selected product in stock. Shipping time is between 3-5 work days;

3-7 work days – we don’t have selected product in stock. Shipping time is between 3-7 work days;

Out of Stock – selected product is sold out at the moment, but you can apply for automatic alert by email when product will be in stock.