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New version of entry-level Arduino Uno WiFi board for IoT projects

08 January 2019

RS Components’ new Arduino board comes with Wi-Fi networking capability and more processing power, by integrating a new 8-bit microprocessor from Microchip.

This second version – Rev2 – of the highly popular Arduino Uno WiFi board is functionally the same as the Arduino Uno Rev3, but also comes with built-in Wi-Fi, enabling easy connection to the Internet, plus the addition of an on board IMU (Inertial Measurement Unit) sensor. The board, which comes in the Uno’s 68.6 x 53.4mm form factor, is based around the new ATmega4809 8-bit processor from Microchip, which in turn integrates 6KB of SRAM and 256 bytes of EEPROM.

The board’s on-board wireless communications SoC module comes with an integrated TCP/IP protocol stack for access to Wi-Fi networks and can act as an Internet access point. The module also delivers security for users, as the Wi-Fi connection is secured via the inclusion of a new ECC608 crypto-chip accelerator.

The Uno board has 14 digital input/output pins – with six that can be used as PWM outputs – and six analogue inputs. Other features include a 16MHz ceramic resonator, USB connection, an ICSP header, power jack and reset button. A highly useful feature of the Uno is support for OTA (Over-The-Air) programming, enabling the transfer of Arduino sketches or Wi-Fi firmware.

Offering plug and plug capability, users can be quickly up and running following connection to a computer via a USB cable. The board can also be powered via an AC-DC adapter or battery.

The Arduino Uno Wi-Fi Rev2 board is shipping now from RS in the EMEA and Asia Pacific regions.


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