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Microcontroller: ATmega1281
Frequency: 14MHz
SRAM: 8KB
EEPROM: 4KB
FLASH: 128KB
SD Card: 2GB
Weight: 20gr
Dimensions: 73.5 x 51 x 13 mm
Temperature range:   [-10ºC, +65ºC]
Clock: RTC (32KHz)

Consumption

ON: 15mA
Sleep: 55uA
Deep Sleep:   55uA
Hibernate:   0.7uA

Input / Output

7 Analog Inputs, 8 Digital I/O, 2 UART, 1 I2C, 1 SPI, 1 USB, Specific Default Socket for “basic sensors” Temperature, Humidity, Light (LDR)

Sensors embedded on board

Temperature (+/-): -40ºC , +85ºC. Accuracy: 0.25ºC.
Accelerometer: ±2g/±4g/±8g
    Low power: 0.5 Hz / 1 Hz / 2 Hz / 5 Hz / 10 Hz
    Normal mode: 50 Hz / 100 Hz / 400 Hz / 1000 Hz

Electrical characteristics

Battery voltage: 3.3V - 4.2V
USB charging: 5V - 100mA
Solar panel load: 6 - 12 V - 280mA