
Overview
The MKR2UNO Adapter allows you to turn your Arduino UNO form factor based project into a MKR based one without too much effort! You can so upgrade your project with a powerful board with integrated LiPo battery charger.
Please note that currently the MKR2UNO adapter is compatible only with MKR1000 without headers
Need Help?
- On the Software on the Arduino Forum
- On Projects on the Arduino Forum
- On the Product itself through our Customer Support
Tech specs
Operating Voltage | 3.3V |
Input Voltage (recommended) | 7-12V |
Input Voltage (limit) | 6-16V |
Analog Input Pins | 6 |
Analog Output Pins | 1 |
Digital I/O Pins | 14 |
DC Current for 3.3V Pin | 700 mA |
DC Current for 5V Pin | 700 mA |
Length | 68.6 mm |
Width | 53.4 mm |
Weight | 24 g |
Conformities
Resources for Safety and Products
Manufacturer Information
The production information includes the address and related details of the product manufacturer.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
https://www.arduino.cc/
Responsible Person in the EU
An EU-based economic operator who ensures the product's compliance with the required regulations.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
Phone: +39 0113157477
Email: support@arduino.cc
Documentation
OSH: Schematics
MKR2UNO is open-source hardware! You can build your own board using the following files:
EAGLE FILES IN .ZIP SCHEMATICS IN .PDF
Please keep in mind that the MKR2UNO is just a form factor adapter and so is NOT present any voltage translation. Be careful before connecting a shield since shield without IOREF level shifting capability may not work properly.
Like in many others Arduino boards this adapter allows to power your MKR board using a barrel jack with center positive polarity or the VIN pin on the headers.
Unlike the Arduino UNO, the MKR2UNO Adapter do NOT have I2C signals on A4 and A5 and SPI on pins 11, 12 and 13.
All the pins on the MKR2UNO Adapter are wired one to one from the MKR to the UNO form factor with some exception:
Get Inspired

Everyone in the world of smart and digital automation is getting ready to meet at SPS in Nuremberg. It’s the place to be if you want to see the future come to life – and of course a great opportunity to get to know Arduino better, with live demos and the chance to talk directly to our experts. Come visit booth 5-338 to discover our growing ecosystem of solutions and see it in action! “Since the 2022 edition of SPS, we’ve launched dozens of components, released software upgrades and added new services. But that’s only half the story. What we strive to achieve is to enable millions of Arduino users to imagine, implement and truly innovate. Our mission is to make technology accessible to all, to see people achieve the impossible. The maker philosophy may have started with tinkering in a messy garage, but has evolved into a distinct professional approach that allows everyone to seize the opportunities that come with the most disruptive phenomena of the present.”– Adriano Chinello, Pro Business Unit Leader at Arduino Without doubt, automation is one of the strongest trends we see today, with huge potential for future development. That’s why the applications we’ll showcase at SPS run the gamut from super-powerful edge computing to energy monitoring systems. For example, in Nuremberg you can check out how the Portenta X8 combines with the Portenta Max Carrier to deploy a secure, industrial-grade Linux computer – ready to interact with equipment in the factory or integrate with existing smart kiosks by creating a multi-protocol gateway that collects data from various onsite controllers, processes them and sends them to the Cloud via Wi-Fi, LoRa®, NB/IoT or LTE Cat.M1. Or you can find out how the Portenta Machine Control can be integrated in an electric panel to monitor consumption and other energy-related parameters... or team up with a Nicla Vision to control a robotic arm that automatically picks items from a conveyor belt and places