Datasheet

6. Radio specification
2.4GHz ISM band radio
Increased range with 20 dBm radio amplifier, tested to > 1 km range LOS with Crazyradio PA (environmentally dependent)
Bluetooth Low Energy support with iOS and Android clients available
Dual antenna support with both on board chip antenna and U.FL connector
7. Expansion connector specification
The expansion connector is used to attach decks with additional functionality. Either official Bitcraze decks can be used or
custom ones can be design using our KiCad template.
The expansion connector includes the following:
VCC 3.0V (max 100mA)
GND
VCOM (unregulated VBAT or VUSB, max 1A)
VUSB (both for input and output)
I2C (400kHz)
SPI
2 x UART
4 x GPIO/CS for SPI
1-wire bus for expansion identification
2 x GPIO connected to nRF51
Please note the following:
The Crazyflie 2.1 is a 3.0V system, meaning a high output will be 3.0V but still compatible with a 3.3V system.
All IO pins are 5V tolerant except PA5 and the NRF51 pins
The NRF51 pins can be multiplexed with any of the available NRF51 peripheral.
The STM32F405RG pins can be multiplexed with more functions.
7.1. Expansion connector multiplexing
8. Mechanical specifications
Takeoff weight: 27g
Size (WxHxD): 92x92x29mm (motor-to-motor and including motor mount feet)
9. Mechanical drawing
Bitcraze AB Datasheet Crazyflie 2.1 - Rev 3
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