![]() ![]() The Arduino Uno Wi-Fi board can operate on an external power supply of 6 to 20 volts. You can connect leads from a battery to the Gnd and Vin pin headers of the POWER connector or plug in a 2.1mm center-positive adapter into the board's power jack. The power source is selected automatically. ![]() External (non-USB) power can come from an AC-to-DC adapter (wall-wart) or battery. The Arduino Uno Wi-Fi can be powered via the USB connection or with an external power supply. Additionally, it can act as an access point. One useful feature of the Uno Wi-Fi is support for OTA (over-the-air) programming, which allows you to transfer Arduino sketches or Wi-Fi firmware wirelessly. The ESP8266 Wi-Fi Module is a self-contained system-on-chip (SoC) with an integrated TCP/IP protocol stack that provides access to your Wi-Fi network. It contains everything needed to support the microcontroller, and can be connected to a computer via USB cable or powered with an AC-to-DC adapter or battery. The Arduino Uno Wi-Fi is the new Arduino Uno with an integrated Wi-Fi module! The board is based on the ATmega328P (datasheet) microcontroller, along with the ESP8266 Wi-Fi Module (datasheet). It features 14 digital input/output pins (six of which can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. Note: This product is discontinued by the manufacturer.
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