Datasheet

The ATSAMW25 includes also a single 1x1 stream PCB Antenna.
The design includes a Li-Po charging circuit that allows the Arduino/Genuino MKR1000 to run on battery
power or external 5V, charging the Li-Po battery while running on external power. Switching from one source
to the other is done automatically.A good 32 bit computational power similar to the Zero board, the usual rich
set of I/O interfaces, low power Wi-Fi with a Cryptochip for secure communication, and the ease of use of the
Arduino Software (IDE) for code development and programming.
All these features make this board the preferred choice for the emerging IoT battery-powered projects in a
compact form factor.
The USB port can be used to supply power (5V) to the board.The Arduino MKR1000 is able to run with or
without the Li-Po battery connected and has limited power consumption.
The MKR1000 Wifi module supports certificate SHA-256.
Warning: Unlike most Arduino & Genuino boards, the MKR1000 runs at 3.3V. The maximum voltage
that the I/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I/O pin could damage
the board. While output to 5V digital devices is possible, bidirectional communication with 5V
devices needs proper level shifting.