The Arduino UNO WiFi Rev.2 is the easiest point of entry to basic IoT with the standard form factor of the UNO family. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data to a cellphone, the Arduino UNO WiFi Rev.2 is your one-stop-solution for many of the basic IoT application scenarios.
Add this board to a device and you'll be able to connect it to a WiFi network, using its secure ECC608 crypto chip accelerator. The Arduino Uno WiFi is functionally the same as the Arduino Uno Rev3, but with the addition of WiFi / Bluetooth® and some other enhancements. It incorporates the brand new ATmega4809 8-bit microcontroller from Microchip and has an onboard IMU (Inertial Measurement Unit) LSM6DS3TR.
The Wi-Fi Module is a self-contained SoC with integrated TCP/IP protocol stack that can provide access to a Wi-Fi network, or act as an access point. It is the u-blox NINA-W102.
The Arduino UNO WiFi Rev.2 has 14 digital input/output pins—5 can be used as PWM outputs—6 analog inputs, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller. Simply connect it to a computer with a USB cable or power it with an AC adapter or battery to get started.
Compatibility
This board has the Microchip ATmega4809 microcontroller, but thanks to the compatibility layer included in the core, you can run all the sketches made for the UNO's ATmega328P microconntroller on the ATmega4809. You can find more information about the usage of this mode in the Getting Started page of the Arduino UNO WiFi Rev.2.
Specifications
Microcontroller
ATMEGA4809
Operating Voltage
5V
Input Voltage (recommended)
7 - 12V
Input Voltage (limit)
6 - 12V
Digital I/O Pins
14 — 5 Provide PWM Output
PWM Digital I/O Pins
5
Analog Input Pins
6
DC Current per I/O Pin
20 mA
DC Current for 3.3V Pin
50 mA
Flash Memory
48 KB (ATMEGA4809)
SRAM
6,144 B (ATMEGA4809)
EEPROM
256 Bytes (ATMEGA4809)
Clock Speed
16 MHz
LED_BUILTIN
25
Length
68.6 mm
Width
53.4 mm
Weight
25 g
Note
Pin 11 is not PWM enabled and the connector is wrongly marked on some batches. Available PWM pins are: 3, 5, 6, 9, and 10.
Download the latest Arduino IDE
The open-source Arduino Software (IDE) makes it easy to write code and upload it to the board. This software can be used with any Arduino board.
The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs).