Metro is our series of microcontroller boards to be used 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 our first Metro that is designed to be used with CircuitPython! CircuitPython is our 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 to be used with circuitry and electronics.
Not only are you able to use CircuitPython, but the Metro M0 is also usable in the Arduino IDE.
Native USB, there is no need for a hardware USB to Serial converter as the Metro M0 has built in USB strengthen. When used to act like a serial device, the USB interface can be utilized by any computer to listen/send data to the METRO, and can 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 utilized for any purpose.
2 MB SPI Flash storage chip is included on board. You’ll 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 of your scripts, libraries and files. When used in Arduino, You’ll read/write files to it, like a little datalogger or SD card, and then with our helper program, access the files over USB.
Comes fully assembled with headers, tested, and with the UF2 bootloader loaded on. We also include 4 rubber bumpers to keep it from slipping off your desk. No soldering required to use, plug and play!
Make sure this fits by entering your model number.
7-9V polarity secure DC or the micro USB connector to any 5V USB source
CircuitPython now comes preloaded
ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic
Built in USB so it has USB-to-Serial program & debug capability built in without having for an FTDI-like chip
256K of FLASH (8x more than the Atmega328) and 32K of RAM (16x as much)
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