{"product_id":"adafruit-metro-mini-328-v2-arduino-compatible-5v-16mhz-stemma-qt-qwiic","title":"Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz","description":"\u003cp\u003eOne of our star development boards is the Adafruit METRO Mini 328, an excellent lil fellow that lets you make your Arduino-based project tiny.\u003c\/p\u003e\n\u003cp\u003eRecently Adafruit 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.\u003c\/p\u003e\n\u003cp\u003eThe V2 is a significant redesign, enough so they consider it a completely new product. It still features the ATmega328 chip but has many upgrades and improvements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSame ATmega328 chip, running at 16 MHz, which makes it compatible with all Arduino UNO based libraries, codes and examples\u003c\/li\u003e\n\u003cli\u003eSame pinout and size, same mounting hole locations.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" data-mce-href=\"\/en-eu\/collections\/stemma-qt\"\u003eAdditional STEMMA QT port for plug and play I2C connections\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB Type C\u003c\/strong\u003e port instead of Micro B\u003c\/li\u003e\n\u003cli\u003eUpgraded USB to serial converter from CP2104 to CP2102 - same great reliable drivers!\u003c\/li\u003e\n\u003cli\u003eCan still be set to use 3.3V power and logic by soldering a jumper on the bottom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe METRO Mini V2 works great with the Arduino IDE, and runs the ATmega328P at 16MHz so it is pin-compatible with Arduino UNO R3 - note you won't be able to plug in shields, but great for use with breadboards. \u003cstrong\u003eYou can use this with the Arduino IDE (both desktop and cloud version) by selecting 'Arduino UNO' in the Boards menu.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMETRO Mini V2 is the culmination of years of playing with AVRs: Adafruit wanted to make a tiny, breadboard-friendly development board that is easy to use and has a STEMMA QT port for plug and play support with hundreds of devices. Metro Mini can be programmed with the Arduino IDE (select 'UNO' in the boards dropdown)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eATmega328 brains\u003c\/strong\u003e - This popular chip has 32KB of flash (1\/2 K is reserved for the bootloader), 2KB of RAM, clocked at 16MHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower the METRO Mini\u003c\/strong\u003e with 6-16V polarity protected on the Vin pin, or plug the micro USB connector to any 5V USB source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMETRO has 20 GPIO pins\u003c\/strong\u003e, 6 of which are Analog in as well, and 2 of which are reserved for the USB-serial converter. There's also 6 PWMs available on 3 timers (1 x 16-bit, 2 x 8-bit). There's a hardware SPI port, hardware I2C port, and hardware UART to USB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGPIO Logic level is 5V\u003c\/strong\u003e but by cutting and soldering closed a jumper on the bottom, you can easily convert it to 3.3V logic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5V onboard regulator\u003c\/strong\u003e with 150mA out, separate 3.3V 500mA regulator is also available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB to Serial converter\u003c\/strong\u003e, there's a genuine SiLabs CP2102N hardware USB to Serial converter that 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\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUSB C power and data\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour indicator LEDs\u003c\/strong\u003e, on the top of the PCB, for easy debugging. One green power LED, two RX\/TX LEDs for the UART, and a red LED connected to pin PB5 \/ digital #13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy reprogramming\u003c\/strong\u003e, comes pre-loaded with the \u003ca href=\"https:\/\/github.com\/Optiboot\/optiboot\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOptiboot bootloader\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeautiful styling\u003c\/strong\u003e by PaintYourDragon and Bruce Yan, in Adafruit Black with gold plated pads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Metro Mini comes as a fully assembled and tested board, with bootloader burned in and also some 0.1\" header. Some light soldering is required if you'd like to plug it into a breadboard, or you can solder wires or header directly to the breakout pads. Once headers are installed they can be fitted into 0.6\" wide sockets\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMac \u0026amp; Windows People! Don't forget to grab the \u003ca href=\"https:\/\/www.silabs.com\/products\/development-tools\/software\/usb-to-uart-bridge-vcp-drivers\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSiLabs CP210x drivers from SiLabs\u003c\/a\u003e to make the COM\/Serial port show up right...\u003c\/strong\u003e The default OS drivers may not support the interface chip\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eATmega328 microcontroller with Optiboot (UNO) Bootloader\u003c\/li\u003e\n\u003cli\u003eUSB Programming and debugging via the well-supported genuine SiLabs CP2102N\u003c\/li\u003e\n\u003cli\u003eInput voltage (Vin): 6-16V (a 9VDC power supply is recommended)\u003c\/li\u003e\n\u003cli\u003e5V logic with 3.3V compatible inputs, can be converted to 3.3V logic operation\u003c\/li\u003e\n\u003cli\u003e20 Digital I\/O Pins: 6 are also PWM outputs and 6 are also Analog Inputs\u003c\/li\u003e\n\u003cli\u003e32KB Flash Memory - 0.5K for bootloader, 31.5KB available after bootloading\u003c\/li\u003e\n\u003cli\u003e16MHz Clock Speed\u003c\/li\u003e\n\u003cli\u003eAdafruit Black PCB with gold plate on pads\u003c\/li\u003e\n\u003cli\u003eJST SH 4-pin \u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT port for plug and play I2C connections\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eDerivative of \u003ca href=\"http:\/\/www.arduino.cc\/en\/Main\/ArduinoBoardUno\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\"Arduino UNO R3 Reference design\" \u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit-METRO-328-PCB\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOpen source hardware files on github!\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/github.com\/adafruit\/Fritzing-Library\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eFritzing object in the Adafruit Fritzing Libra\u003c\/a\u003ery\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.atmel.com\/devices\/atmega328p.aspx\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eATmega328P product page\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 44.3mm x 17.8mm x 4.9mm \/ 1.7\" x 0.7\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 3.4g \/ 0.1oz\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":40206441250899,"sku":"ADA5597","price":15.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5597-06.jpg?v=1661270557","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-metro-mini-328-v2-arduino-compatible-5v-16mhz-stemma-qt-qwiic","provider":"Pimoroni Ltd","version":"1.0","type":"link"}