S1 is also higher than D1, so the Q1A body diode blocks. However, if voltage is connected backwards, the body diode in Q5-1 conducts, holding G1 and S1 at the same voltage, closing the Q1A conductive channel. There's an immediate voltage drop of around 1 V, but then provided the Q5-1 nMOS is conducting, R27 will pull G1 below S1, turning on the pMOS's conductive channel and reducing its resistance to a few tens of milliohms. Under normal operation, the body diode in the pMOS conducts from the drain to the source. As it's behaving like a diode, it blocks current flow if the power supply is connected in reverse. On the left, the Q1A pMOS is connected 'backwards' in what is called an 'ideal diode' configuration. You can find more information about the usage of this mode in the Getting Started page of the Arduino UNO WiFi Rev.2.They're actually back-to-back P-channel MOSFETs. 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. Simply connect it to a computer with a USB cable or power it with an AC adapter or battery to get started. It contains everything needed to support the microcontroller. 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. 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 incorporates the brand new ATmega4809 8-bit microcontroller from Microchip and has an onboard IMU (Inertial Measurement Unit) LSM6DS3TR. The Arduino Uno WiFi is functionally the same as the Arduino Uno Rev3, but with the addition of WiFi / Bluetooth® and some other enhancements.

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.Īdd 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 Rev.2 is the easiest point of entry to basic IoT with the standard form factor of the UNO family.

Arduino uno wifi rev2 datasheet