SPECIFICATIONS:-
• Microcontroller: SAMD21 Cortex- M0+32 bit low power ARM MCU
• Radio module: U- Blox NINA-W 102
• Board power supply (USB/VIN): 5v
• Secure element: ATECCC508
• Supported battery: Li-Po single cell, 3.7V,1024 mAh minimum
• Circuit operating voltage: 3.3V
• Digital I/O Pins: 8
• PWM Pins: 13 (0,…8,10,12,18/A3, 19/A4)
• UART: 1
• SPI: 1
• I2C: 1
• Analog input pins:7 (ADC 8/10/12 bit)
• Analog output pins: 1 (DAC 10 bit)
• External interrupts: 8 (0,1,4,5,6,7,8,16/A1,17/A2)
• DC current per I/O pin: 7 mA
• CPU flash memory: 256 KB (internal)
• SRAM: 32 KB
• EEPROM: no
• Clock speed: 32.768 kHz (RTC),48 MHz
• LED_BUILTIN: 6
• USB: Full-speed USB device and embedded host
• Size: 61.5mm x 25mm
• Weight: 32 gm